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SBE 37 SMP-ODO with Plastic Housing, No Pressure Sensor, XSG Connector, RS-485, 600 meter ODO Sensor, Includes Accessories

SBE 37 SMP-ODO with Plastic Housing, No Pressure Sensor, XSG Connector, RS-485, 600 meter ODO Sensor, Includes Accessories
Product #: 37SMP.10112S
USD Price: Get Quote

SBE 37 Change Notice

Model 37-SM 37-SMP 37-SMP-ODO
Pump No Yes Yes
Dissolved Oxygen Sensor No No Yes
Housing 1 - 350 m (plastic)
3 - 7000 m (titanium)
1 - 350 m (plastic)
3 - 7000 m (titanium)
1 - 350 m (plastic)
3 - 7000 m (titanium)
Pressure Sensor/Range 0 - none
1 - 20 m strain gauge
2 - 100 m strain gauge
3 - 350 m strain gauge
4 - 600 m strain gauge
5 - 1000 m strain gauge
6 - 2000 m strain gauge
7 - 3500 m strain gauge
8 - 7000 m strain gauge
0 - none
1 - 20 m strain gauge
2 - 100 m strain gauge
3 - 350 m strain gauge
4 - 600 m strain gauge
5 - 1000 m strain gauge
6 - 2000 m strain gauge
7 - 3500 m strain gauge
8 - 7000 m strain gauge
0 - none
1 - 20 m strain gauge
2 - 100 m strain gauge
3 - 350 m strain gauge
4 - 600 m strain gauge
5 - 1000 m strain gauge
6 - 2000 m strain gauge
7 - 3500 m strain gauge
8 - 7000 m strain gauge
Connector 1 - XSG
2 - MCBH

1 - XSG
2 - MCBH

1 - XSG
2 - MCBH
Communications 0 - RS-232
1 - RS-485
0 - RS-232
1 - RS-485
2 - SDI-12
(requires MCBH connector)
0 - RS-232
1 - RS-485
2 - RS-232 / SDI-12
(requires MCBH connector)
SBE 63 Optical
Dissolved Oxygen
0 - none 0 - none 2 - 600 m
3 - 5000 m
4 - 7000 m
SBE 37-SM MicroCAT C-T (P) Recorder

Example: 37SM.13100 is an SBE 37-SM with 350 m housing, 350 m strain gauge pressure sensor, XSG connector, and RS-232 communications. See table below for description of each selection:

PART # DESCRIPTION NOTES
37SM

MicroCAT C and T (pressure optional) Recorder with Serial interface and Memory - Includes mooring clamp, 8 MB Flash memory, serial interface, external power input capability (power plus serial on connector), lithium battery (non-hazardous), AF24173 Anti-Foulant Devices, data/power interface cable (cable may be deleted for credit), Seasoft software, and complete documentation.

37-SM MicroCAT includes:

  • Serial interface
  • Memory

Compare features of the numerous SBE 37 MicroCAT models.

SBE 37-SM Housing (depth) Selections MUST SELECT ONE
37SM.1xxx0 350 m plastic housing  
37SM.3xxx0 7000 m titanium housing  
SBE 37-SM Pressure Sensor Range (depth) Selections — MUST SELECT ONE
37SM.x0xx0 No pressure sensor

Pressure sensor is installed in end cap, & is not field replaceable / swappable. While highest pressure rating gives you most flexibility in using MicroCAT, it is at expense of accuracy & resolution. It is advantageous to use lowest range pressure sensor compatible with your intended maximum operating depth, because accuracy & resolution are proportional to pressure sensor's full scale range. For example, comparing 2000 & 7000 m sensors:

  • 2000 m sensor:
    initial accuracy = 2 m (= 0.1% * 2000 m),
    resolution = 0.04 m (= 0.002% * 2000 m)
  • 7000 m sensor:
    initial accuracy = 7 m (= 0.1% * 7000 m),
    resolution = 0.14 m (= 0.002% * 7000 m)
37SM.x1xx0 20 m strain gauge pressure sensor
37SM.x2xx0 100 m strain gauge pressure sensor
37SM.x3xx0 350 m strain gauge pressure sensor
37SM.x4xx0 600 m strain gauge pressure sensor
37SM.x5xx0 1000 m strain gauge pressure sensor
37SM.x6xx0 2000 m strain gauge pressure sensor
37SM.x7xx0 3500 m strain gauge pressure sensor
37SM.x8xx0 7000 m strain gauge pressure sensor
SBE 37-SM Connector Selections MUST SELECT ONE
37SM.xx1x0 XSG connector (includes data/power interface cable 801385)

Wet-pluggable connectors may be mated in wet conditions. Their pins do not need to be dried before mating. By design, water on connector pins is forced out as connector is mated. However, they must not be mated or un-mated while submerged. Wet-pluggable connectors have a non-conducting guide pin to assist pin alignment & require less force to mate, making them easier to mate reliably under dark or cold conditions, compared to XSG/AG connectors. Like XSG/AG connectors, wet-pluggables need proper lubrication & require care during use to avoid trapping water in sockets.

 
XSG connector on left, Wet-pluggable (MCBH) connector on right

37SM.xx2x0 Wet-pluggable (MCBH) connector (includes data/power interface cable 801206)
SBE 37-SM Communications Selections— MUST SELECT ONE
37SM.xxx00 RS-232 serial interface

Note: Each interface version of 37-SM has a separate manual.

37SM.xxx10 RS-485 (half duplex ONLY) serial interface Two-wire, RS-485 interface provides communication with individual 37-SM or with all 37-SMs attached to RS-485 interface. This allows for coordination of sampling among many instruments. However, note that half-duplex communication is one-direction at a time (i.e., you cannot send commands & receive data at same time).
Note: Each interface version of 37-SM has a separate manual.
SBE 37-SM Mooring Clamp Wire Size Selections (Specify clamp to match O.D. of mooring wire jacket) — MUST SELECT ONE
50261.I Wire guide & mounting clamp for 1/4 in. diameter mooring wire

Cable fits loosely through wire guide, & is clamped only at mounting clamp. See document 67094. '.I' designation indicates that guide and clamp are to be installed on instrument at factory.

Thread for clamping to mooring cable:

  • 1/4 in. diameter: 1/4-28 UNF
  • 5/16 in./8 mm diameter: 5/16-24 UNF
  • 3/8 in. diameter: 3/8-24 UNF
  • 1/2 in. diameter: 9/16-12 UNC
  • 5/8 in./16 mm diameter: 5/8-18 UNF
  • 6 mm diameter: 1/4-20 UNF
  • 8 mm diameter: 5/16-24 UNF
  • 10 mm diameter: 7/16 -14 UNF
  • 12 mm diameter: 1/2-13 UNF

Clamp Size Note: Mooring wire is typically specified by wire size, not by outer diameter (O.D.) of the mooring wire jacket. Verify the wire jacket O.D. before selecting the clamp size. The clamp size must be less than or equal to the wire jacket O.D. but larger than the wire diameter. For example, Mooring System Inc.’s specifications for 3x19 wire rope (in 2016) are as follows:

Wire Diameter Jacket Diameter Recommended Sea-Bird Clamp
3/16 inch (5.0 mm) 0.255 inch (6.5 mm) 1/4 inch
1/4 inch (6.5 mm) 0.330 inch (8.4 mm) 5/16 inch
5/16 inch (8.0 mm) 0.392 inch (9.9 mm) 3/8 inch
3/8 inch (9.5 mm) 0.453 inch (11.5 mm) 10 mm (0.394 inch)
7/16 inch (11.1 mm) 0.5 inch (12.7 mm) 1/2 inch

For mounting on a rope, verify the rope outer diameter, and select a clamp smaller than the rope O.D. to account for the rope compressibility (for example, for 5/16 inch rope, select a ¼ inch clamp; a 5/16 inch clamp will be too large).

50263.I Wire guide & mounting clamp for 5/16 in. or 8 mm diameter mooring wire
50262.I Wire guide & mounting clamp for 3/8 in. diameter mooring wire
50269.I Wire guide & mounting clamp for 1/2 in. diameter mooring wire
50267.I Wire guide & mounting clamp for 6 mm diameter mooring wire
50268.I Wire guide & mounting clamp for 10 mm diameter mooring wire
50270.I Wire guide & mounting clamp for 12 mm diameter mooring wire
50271.I Wire guide & mounting clamp for 5/8 in. or 16 mm diameter mooring wire
50264.I Alternative mounting - plastic brackets to provide through-bolt mounting to a flat surface

See document 67096. '.I' designation indicates that brackets are to be installed on instrument at factory.

SBE 37-SM Spares & Accessories
801542 AF24173 Anti-Foulant Device pair (spare, bagged, labeled for shipping) Anti-foulant devices fit into anti-foulant device cups at each end of conductivity cell. Anti-foulant devices included with standard shipment; these are spares.
Useful life varies, depending on several factors. We recommend that customers consider more frequent replacement when high biological activity & strong current flow (greater dilution of anti-foulant concentration) are present. Moored instruments in high growth & strong dilution environments have been known to obtain a few months of quality data, while drifters that operate in non-photic, less turbid deep ocean environments may achieve years of quality data. Experience may be strongest determining factor in specific deployment environments.
50441 SBE 37 & 44 lithium batteries (spare), package of twelve 3.6V AA cells (Saft LS 14500)

One set of batteries is included with standard shipment; 50441 are spares. Batteries are easily accessed by removing 2 screws from connector end cap & pulling out end cap. Shipping restrictions apply for lithium batteries; see SBE 37-SM manual for details. Click here to buy Saft LS 14500 from Amazon.

In 2008, original battery pack was replaced with red top battery holder, which uses 12 AA lithium batteries instead of 50243.1 battery set. See Application Note 89 for details.

801797 is battery holder, without batteries.

Price for 50442, which includes both battery holder (801797) & batteries (50441), is less than price when ordering battery holder & batteries separately. Sea-Bird is helping to absorb some cost for new battery holders by providing a reduced price.

Note: Newer MicroCATs (SMP & IMP with firmware > 4.0, and all IDO & ODO MicroCATs) use a battery pack with a yellow cover plate; the wiring of that pack is different from this one, and cannot be used with SBE 37-SM.



801797 shown with 50441 cells installed
(Note: Cells cannot be shipped installed in battery holder)


Cells packed in heat-sealed plastic (above),
then placed in bubble-wrap outer sleeve & strong packaging for shipment (below)

801797 Red top battery holder (7V nominal, Version 1) for use with twelve 3.6V AA lithium cells, for SBE 37 (SM, SMP, IM, IMP with firmware version < 4.0) & SBE 44
50442 Red top battery holder (7V nominal, Version 1) (PN 801797) and twelve AA lithium cells (PN 50441), for SBE 37 (SM, SMP, IM, IMP with firmware version < 4.0) and SBE 44
233540 Anti-foulant cap without hose barb, black (for use with SBE 37 [SM, SMP, IM, IMP, SI, SIP] with firmware version < 4.0)

Anti-foulant cap holds AF24173 Anti-Foulant Device in place. This cap, without a hose barb, is a spare, and is intended for use during deployment.
Note: Do not deploy MicroCAT with barbed anti-foulant device cap(s)!

50087.1 Cell filler/storage device with hose barbs (Application Note 34) This kit includes a syringe & tubing assembly, & 2 anti-foulant device caps with hose barbs. Remove installed anti-foulant device cap(s) & replace them with caps with hose barbs for cleaning & storage only.
  • Cleaning instructions require use of syringe & tubing assembly at intake end of conductivity cell (requiring 1 barbed cap).
  • Storage instructions require looping Tygon tubing from end to end of conductivity cell (requiring 2 barbed caps).
Do not deploy MicroCAT with barbed anti-foulant device cap(s)!
801385 Data/Power interface cable, RMG-4FS to DB-9S & red/black twisted wire leads, 2.4 m (DN 32277) Included with standard shipment if 37SM.xx1x0 (XSG connector) selected; this is spare.
801206 Data/Power interface cable, Wet-Pluggable, MCIL-4FS to DB-9S & red/black twisted wire leads, 2.4 m (DN 32366) Included with standard shipment if 37SM.xx2x0 (MCBH connector) selected; this is spare.
20200 USB to Serial Port Adapter, FTDI UC232R-10 (connects computers with USB ports to RS-232 instruments) Many newer PCs & laptop computers have USB port(s) instead of RS-232 serial port(s). USB serial adapter plugs into USB port, & allows a serial device to be connected through adapter. Multi-port adapters are available from other companies; see Application Note 68.
233186 High-head pressure port plug for muddy/biologically productive environments (Application Note 84), for use with SBE 37 [SM, SMP, IM, IMP, SI, SIP] with firmware version < 4.0 This pressure port plug extends beyond surface of instrument end cap, and has 4 horizontal vent holes connecting internally to a vertical vent hole. If you are deploying 37-SM in an orientation close to horizontal, with pressure port up, horizontal orientation of vent holes prevents deposit of sediment inside pressure port. Each of the 4 vent holes is larger than single vent hole in standard pressure port plug, significantly reducing possibility that biological growth will cover all holes. See Application Note 84.
31632 Storm Shipping Case (iM2950) - holds up to 4 SBE 37SMs

Storm shipping case with custom foam inserts holds up to 4 MicroCATs that do not include dissolved oxygen — IMP, IM, SMP, SM, SIP, SI.

  • Injection molded case with HPX resin plastic body, recessed wheels, automatic pressure equalization valve, hinged push-button latches, fold-down padded handle, & O-ring seal. Meets airline luggage regulations.
  • Inner dimensions:
    29 x 18 x 10.5 inches (74 x 46 x 27 cm).
  • Outer dimensions:
    31.3 x 20.4 x 12.2 inches (80 x 52 x 31 cm).
SBE 37-SMP MicroCAT C-T (P) Recorder

Example: 37SMP.13100 is an SBE 37-SMP with 350 m housing, 350 m strain gauge pressure sensor, XSG connector, and RS-232 communications. See table below for description of each selection:

PART # DESCRIPTION NOTES
37SMP

MicroCAT C and T (pressure optional) Recorder with Serial interface, Memory and internal Pump - Includes mooring clamp, 8 MB Flash memory, serial interface, external power input capability (power plus serial on connector), lithium battery (non-hazardous), AF24173 Anti-Foulant Devices, data/power interface cable (cable may be deleted for credit), Seasoft software, and complete documentation.

37-SMP MicroCAT includes:

  • Serial interface
  • Memory
  • internal, integral Pump — pump provides improved conductivity response & improved anti-foul protection over 37-SM

Compare features of the numerous SBE 37 MicroCAT models.

SBE 37-SMP Housing (depth) Selections MUST SELECT ONE
37SMP.1xxx0 350 m plastic housing  
37SMP.3xxx0 7000 m titanium housing  
SBE 37-SMP Pressure Sensor Range (depth) Selections — MUST SELECT ONE
37SMP.x0xx0 No pressure sensor

Pressure sensor is installed in end cap (behind mount clamp), & is not field replaceable / swappable. While highest pressure rating gives you most flexibility in using MicroCAT, it is at expense of accuracy & resolution. It is advantageous to use lowest range pressure sensor compatible with your intended maximum operating depth, because accuracy & resolution are proportional to pressure sensor's full scale range. For example, comparing 2000 & 7000 m sensors:

  • 2000 m sensor:
    initial accuracy = 2 m (= 0.1% * 2000 m),
    resolution = 0.04 m (= 0.002% * 2000 m)
  • 7000 m sensor:
    initial accuracy = 7 m (= 0.1% * 7000 m),
    resolution = 0.14 m (= 0.002% * 7000 m)
37SMP.x1xx0 20 m strain gauge pressure sensor
37SMP.x2xx0 100 m strain gauge pressure sensor
37SMP.x3xx0 350 m strain gauge pressure sensor
37SMP.x4xx0 600 m strain gauge pressure sensor
37SMP.x5xx0 1000 m strain gauge pressure sensor
37SMP.x6xx0 2000 m strain gauge pressure sensor
37SMP.x7xx0 3500 m strain gauge pressure sensor
37SMP.x8xx0 7000 m strain gauge pressure sensor
SBE 37-SMP Connector Selections MUST SELECT ONE
37SMP.xx1x0 XSG connector (includes data/power interface cable 801385)

Wet-pluggable connectors may be mated in wet conditions. Their pins do not need to be dried before mating. By design, water on connector pins is forced out as connector is mated. However, they must not be mated or un-mated while submerged. Wet-pluggable connectors have a non-conducting guide pin to assist pin alignment & require less force to mate, making them easier to mate reliably under dark or cold conditions, compared to XSG/AG connectors. Like XSG/AG connectors, wet-pluggables need proper lubrication & require care during use to avoid trapping water in sockets.

 
XSG connector on left, Wet-pluggable (MCBH) connector on right

37SMP.xx2x0 Wet-pluggable (MCBH) connector (includes data/power interface cable 801206)
SBE 37-SMP Communications Selections— MUST SELECT ONE
37SMP.xxx00 RS-232 serial interface

Note: Each interface version of 37-SMP has a separate manual.

37SMP.xxx10 RS-485 (half duplex ONLY) serial interface Two-wire, RS-485 interface provides communication with individual 37-SMP or with all 37-SMPs attached to RS-485 interface. This allows for coordination of sampling among many instruments. However, note that half-duplex communication is one-direction at a time (i.e., you cannot send commands & receive data at same time).
Note: Each interface version of 37-SMP has a separate manual.
37SMP.xxx20 SDI-12 interface (in addition to RS-232 interface); requires MCBH connector SDI-12 interface is in addition to RS-232 interface. Instrument can be set up via RS-232, using full set of commands, and then a more limited set of commands can be sent via SDI-12 to make small setup changes in the field.
Note: Each interface version of 37-SMP has a separate manual.
SBE 37-SMP Mooring Clamp Wire Size Selections (Specify clamp to match O.D. of mooring wire jacket) — MUST SELECT ONE
50465.I Wire guide & mounting clamp for 1/4 in. diameter mooring wire

Cable fits loosely through wire guide, & is clamped only at mounting clamp. See document 67219. '.I' designation indicates that guide and clamp are to be installed on instrument at factory.

Thread for clamping to mooring cable:

  • 1/4 in. diameter: 1/4-28 UNF
  • 5/16 in./8 mm diameter: 5/16-24 UNF
  • 3/8 in. diameter: 3/8-24 UNF
  • 1/2 in. diameter: 9/16-12 UNC
  • 5/8 in./16 mm diameter: 5/8-18 UNF
  • 6 mm diameter: 1/4-20 UNF
  • 10 mm diameter: 7/16 -14 UNF
  • 12 mm diameter: 1/2-13 UNF

Clamp Size Note: Mooring wire is typically specified by wire size, not by outer diameter (O.D.) of the mooring wire jacket. Verify the wire jacket O.D. before selecting the clamp size. The clamp size must be less than or equal to the wire jacket O.D. but larger than the wire diameter. For example, Mooring System Inc.’s specifications for 3x19 wire rope (in 2016) are as follows:

Wire Diameter Jacket Diameter Recommended Sea-Bird Clamp
3/16 inch (5.0 mm) 0.255 inch (6.5 mm) 1/4 inch
1/4 inch (6.5 mm) 0.330 inch (8.4 mm) 5/16 inch
5/16 inch (8.0 mm) 0.392 inch (9.9 mm) 3/8 inch
3/8 inch (9.5 mm) 0.453 inch (11.5 mm) 10 mm (0.394 inch)
7/16 inch (11.1 mm) 0.5 inch (12.7 mm) 1/2 inch

For mounting on a rope, verify the rope outer diameter, and select a clamp smaller than the rope O.D. to account for the rope compressibility (for example, for 5/16 inch rope, select a ¼ inch clamp; a 5/16 inch clamp will be too large).

50469.I Wire guide & mounting clamp for 5/16 in. or 8 mm diameter mooring wire
50470.I Wire guide & mounting clamp for 3/8 in. diameter mooring wire
50473.I Wire guide & mounting clamp for 1/2 in. diameter mooring wire
50467.I Wire guide & mounting clamp for 6 mm diameter mooring wire
50471.I Wire guide & mounting clamp for 10 mm diameter mooring wire
50474.I Wire guide & mounting clamp for 12 mm diameter mooring wire
50476.I Wire guide & mounting clamp for 5/8 in. or 16 mm diameter mooring wire
50479.I Alternative mounting - plastic brackets to provide through-bolt mounting to a flat surface See document 67218. '.I' designation indicates that brackets are to be installed on instrument at factory.
SBE 37-SMP Spares & Accessories
801542 AF24173 Anti-Foulant Device pair (spare, bagged, labeled for shipping) Anti-foulant devices fit into anti-foulant device cups at each end of conductivity cell. Anti-foulant devices included with standard shipment; these are spares.
Useful life varies, depending on several factors. We recommend that customers consider more frequent replacement when high biological activity & strong current flow (greater dilution of anti-foulant concentration) are present. Moored instruments in high growth & strong dilution environments have been known to obtain a few months of quality data, while drifters that operate in non-photic, less turbid deep ocean environments may achieve years of quality data. Experience may be strongest determining factor in specific deployment environments.
50441 SBE 37 & 44 lithium batteries (spare), package of twelve 3.6V AA cells (Saft LS 14500)

One set of batteries is included with standard shipment; 50441 are spares. Batteries are easily accessed by removing 2 screws from connector end cap & pulling out end cap. Shipping restrictions apply for lithium batteries; see SBE 37-SMP manual for details. Click here to buy Saft LS 14500 from Amazon.

801863 is battery holder, without batteries. Battery holder is included with standard shipment; this is a spare.
Note: Older MicroCATs use a battery pack with a red cover plate (see 50442 below); wiring of that pack is different from this one, and cannot be used with 37-SMP MicroCATs with firmware version > 4.0.


801863 shown with 50441 cells installed
(Note: Cells cannot be shipped
installed in battery holder)


Cells packed in heat-sealed plastic (above),
then placed in bubble-wrap outer sleeve &
strong packaging for shipment (below)

801863 Yellow top battery holder (14V nominal, Version 2) for use with twelve 3.6V AA lithium cells, for pumped SBE 37 (SMP & IMP with firmware version > 4.0 & all SMP-ODO, IMP-ODO, SMP-IDO, & IMP-IDO)
801797 Red top battery holder (7V nominal, Version 1) for use with twelve 3.6V AA lithium cells, for SBE 37 (SM, SMP, IM, IMP with firmware version < 4.0) & SBE 44

In 2008, original battery pack was replaced with red top battery holder, which uses 12 AA lithium batteries instead of 50243.1 battery set. See Application Note 89 for details.

801797 is battery holder, without batteries.

Price for 50442, which includes both battery holder (801797) & batteries (50441), is less than price when ordering battery holder & batteries separately. Sea-Bird is helping to absorb some cost for new battery holders by providing a reduced price.

Note: Newer MicroCATs use a battery pack with a yellow cover plate (see above); wiring of that pack is different from this one, and cannot be used with 37-SMP MicroCATs with firmware version < 4.0.

50442 Red top battery holder (7V nominal, Version 1) (PN 801797) and twelve AA lithium cells (PN 50441), for SBE 37 (SM, SMP, IM, IMP with firmware version < 4.0) and SBE 44
233540 Anti-foulant cap without hose barb, black (for use with SBE 37 [SM, SMP, IM, IMP, SI, SIP] with firmware version < 4.0)

Anti-foulant cap holds AF24173 Anti-Foulant Device in place.
Note: Anti-Foulant Devices are held in place by conductivity cell guard in newer 37-SMPs (firmware version > 4.0).

801385 Data/Power interface cable, RMG-4FS to DB-9S & red/black twisted wire leads, 2.4 m (DN 32277) Included with standard shipment if 37SMP.xx1x0 (XSG connector) and 37SMP.xxx00 or  37SMP.xxx10 (RS-232 or RS-485 interface) selected; this is spare.
801206 Data/Power interface cable, Wet-Pluggable, MCIL-4FS to DB-9S & red/black twisted wire leads, 2.4 m (DN 32366) Included with standard shipment if 37SMP.xx2x0 (MCBH connector) and 37SMP.xxx00 or  37SMP.xxx10 (RS-232 or RS-485 interface) selected; this is spare.
802220 Data/Power interface cable for RS-232 and SDI-12 interface, Wet-pluggable, MCIL-6FS to DB-9S & red/black twisted wire leads, 2.4 m (DN 33733) Included with standard shipment if 37SMP.xx2x0 (MCBH connector) and 37SMP.xxx20 (SDI-12 interface) selected; this is spare.
20200 USB to Serial Port Adapter, FTDI UC232R-10 (connects computers with USB ports to RS-232 instruments) Many newer PCs & laptop computers have USB port(s) instead of RS-232 serial port(s). USB serial adapter plugs into USB port, & allows a serial device to be connected through adapter. Multi-port adapters are available from other companies; see Application Note 68.
233186 High-head pressure port plug for muddy/biologically productive environments (Application Note 84), for use with SBE 37 [SM, SMP, IM, IMP, SI, SIP] with firmware version < 4.0 This pressure port plug extends beyond surface of instrument end cap, and has 4 horizontal vent holes connecting internally to a vertical vent hole. If you are deploying 37-SMP in an orientation close to horizontal, with pressure port up, horizontal orientation of vent holes prevents deposit of sediment inside pressure port. Each of the 4 vent holes is larger than single vent hole in standard pressure port plug, significantly reducing possibility that biological growth will cover all holes. See Application Note 84.

Note: High-head pressure port plug is not compatible with newer 37-SMPs (firmware version > 4.0), because pressure port plug is behind mount clamp.
31632 Storm Shipping Case (iM2950) - holds up to 4 SBE 37SMPs

Storm shipping case with custom foam inserts holds up to 4 MicroCATs that do not include dissolved oxygen — IMP, IM, SMP, SM, SIP, SI.

  • Injection molded case with HPX resin plastic body, recessed wheels, automatic pressure equalization valve, hinged push-button latches, fold-down padded handle, & O-ring seal. Meets airline luggage regulations.
  • Inner dimensions:
    29 x 18 x 10.5 inches (74 x 46 x 27 cm).
  • Outer dimensions:
    31.3 x 20.4 x 12.2 inches (80 x 52 x 31 cm).
SBE 37-SMP-ODO MicroCAT C-T-DO (P) Recorder

Example: 37SMP.13102 is an SBE 37-SMP-ODO with 350 m housing, 350 m strain gauge pressure sensor, XSG connector, RS-232 communications, and integrated SBE 63 Optical Dissolved Oxygen Sensor with DO sensor rated to 600 m. See table below for description of each selection:

PART # DESCRIPTION NOTES
37SMP-ODO

MicroCAT C and T (pressure optional) Recorder with Integrated SBE 63 Optical Dissolved Oxygen sensor (ODO), Serial interface, Memory and internal Pump - Includes mooring clamp, 8 MB Flash memory, serial interface, external power input capability (power plus serial on connector), lithium battery (non-hazardous), AF24173 Anti-Foulant Devices, data/power interface cable (cable may be deleted for credit), Seasoft software, and complete documentation.

37-SMP-ODO MicroCAT includes:

  • Serial interface
  • Memory
  • internal, integral Pump
  • integrated Optical Dissolved Oxygen sensor

Compare features of the numerous SBE 37 MicroCAT models.

SBE 37-SMP-ODO Housing (depth) Selections MUST SELECT ONE
37SMP.1xxxx 350 m plastic housing  
37SMP.3xxxx 7000 m titanium housing  
SBE 37-SMP-ODO Pressure Sensor Range (depth) Selections — MUST SELECT ONE
37SMP.x0xxx No pressure sensor Pressure sensor is installed in end cap (behind mount clamp), & is not field replaceable / swappable. While highest pressure rating gives you most flexibility in using MicroCAT, it is at expense of accuracy & resolution. It is advantageous to use lowest range pressure sensor compatible with your intended maximum operating depth, because accuracy & resolution are proportional to pressure sensor's full scale range. For example, comparing 2000 & 7000 m sensors:
  • 2000 m sensor:
    initial accuracy = 2 m (= 0.1% * 2000 m),
    resolution = 0.04 m (= 0.002% * 2000 m)
  • 7000 m sensor:
    initial accuracy = 7 m (= 0.1% * 7000 m),
    resolution = 0.14 m (= 0.002% * 7000 m)
37SMP.x1xxx 20 m strain gauge pressure sensor
37SMP.x2xxx 100 m strain gauge pressure sensor
37SMP.x3xxx 350 m strain gauge pressure sensor
37SMP.x4xxx 600 m strain gauge pressure sensor
37SMP.x5xxx 1000 m strain gauge pressure sensor
37SMP.x6xxx 2000 m strain gauge pressure sensor
37SMP.x7xxx 3500 m strain gauge pressure sensor
37SMP.x8xxx 7000 m strain gauge pressure sensor
SBE 37-SMP-ODO Connector Selections MUST SELECT ONE
37SMP.xx1xx XSG connector (includes data/power interface cable 801385)

Wet-pluggable connectors may be mated in wet conditions. Their pins do not need to be dried before mating. By design, water on connector pins is forced out as connector is mated. However, they must not be mated or un-mated while submerged. Wet-pluggable connectors have a non-conducting guide pin to assist pin alignment & require less force to mate, making them easier to mate reliably under dark or cold conditions, compared to XSG/AG connectors. Like XSG/AG connectors, wet-pluggables need proper lubrication & require care during use to avoid trapping water in sockets.

 
XSG connector on left, Wet-pluggable (MCBH) connector on right

37SMP.xx2xx Wet-pluggable (MCBH) connector (includes data/power interface cable 801206)
SBE 37-SMP-ODO Communications Selections— MUST SELECT ONE
37SMP.xxx0x RS-232 serial interface Note: Each interface version of 37-SMP-ODO has a separate manual.
37SMP.xxx1x RS-485 (half duplex ONLY) serial interface Two-wire, RS-485 interface provides communication with individual 37-SMP-ODO or with all 37-SMP-ODOs attached to RS-485 interface. This allows for coordination of sampling among many instruments. However, note that half-duplex communication is one-direction at a time (i.e., you cannot send commands & receive data at same time).
Note: Each interface version of 37-SMP-ODO has a separate manual.
37SMP.xxx2x SDI-12 interface (in addition to RS-232 interface); requires MCBH connector SDI-12 interface is in addition to RS-232 interface. Instrument can be set up via RS-232, using full set of commands, and then a more limited set of commands can be sent via SDI-12 to make small setup changes in the field.
Note: Each interface version of 37-SMP-ODO has a separate manual.
SBE 37-SMP-ODO Optical Dissolved Oxygen Sensor Selections— MUST SELECT ONE
37SMP.xxxx2 600 meter  
37SMP.xxxx3 5000 meter
37SMP.xxxx4 7000 meter
SBE 37-SMP-ODO Mooring Clamp Wire Size Selections (Specify clamp to match O.D. of mooring wire jacket) — MUST SELECT ONE
50465.I Wire guide & mounting clamp for 1/4 in. diameter mooring wire

37-SMP-IDO shown; mooring clamp detail for 37-SMP-ODO identical

Cable fits loosely through wire guide, & is clamped only at mounting clamp. See document 67219. '.I' designation indicates that guide and clamp are to be installed on instrument at factory.

Thread for clamping to mooring cable:

  • 1/4 in. diameter: 1/4-28 UNF
  • 5/16 in./8 mm diameter: 5/16-24 UNF
  • 3/8 in. diameter: 3/8-24 UNF
  • 1/2 in. diameter: 9/16-12 UNC
  • 5/8 in./16 mm diameter: 5/8-18 UNF
  • 6 mm diameter: 1/4-20 UNF
  • 10 mm diameter: 7/16 -14 UNF
  • 12 mm diameter: 1/2-13 UNF

Clamp Size Note: Mooring wire is typically specified by wire size, not by outer diameter (O.D.) of the mooring wire jacket. Verify the wire jacket O.D. before selecting the clamp size. The clamp size must be less than or equal to the wire jacket O.D. but larger than the wire diameter. For example, Mooring System Inc.’s specifications for 3x19 wire rope (in 2016) are as follows:

Wire Diameter Jacket Diameter Recommended Sea-Bird Clamp
3/16 inch (5.0 mm) 0.255 inch (6.5 mm) 1/4 inch
1/4 inch (6.5 mm) 0.330 inch (8.4 mm) 5/16 inch
5/16 inch (8.0 mm) 0.392 inch (9.9 mm) 3/8 inch
3/8 inch (9.5 mm) 0.453 inch (11.5 mm) 10 mm (0.394 inch)
7/16 inch (11.1 mm) 0.5 inch (12.7 mm) 1/2 inch

For mounting on a rope, verify the rope outer diameter, and select a clamp smaller than the rope O.D. to account for the rope compressibility (for example, for 5/16 inch rope, select a ¼ inch clamp; a 5/16 inch clamp will be too large).

50469.I Wire guide & mounting clamp for 5/16 in. or 8 mm diameter mooring wire
50470.I Wire guide & mounting clamp for 3/8 in. diameter mooring wire
50473.I Wire guide & mounting clamp for 1/2 in. diameter mooring wire
50467.I Wire guide & mounting clamp for 6 mm diameter mooring wire
50471.I Wire guide & mounting clamp for 10 mm diameter mooring wire
50474.I Wire guide & mounting clamp for 12 mm diameter mooring wire
50476.I Wire guide & mounting clamp for 5/8 in. or 16 mm diameter mooring wire
50479.I Alternative mounting - plastic brackets to provide through-bolt mounting to a flat surface See document 67218. '.I' designation indicates that brackets are to be installed on instrument at factory.
SBE 37-SMP-ODO Spares & Accessories
801542 AF24173 Anti-Foulant Device pair (spare, bagged, labeled for shipping) Anti-foulant devices fit into anti-foulant device cups at each end of conductivity cell. Anti-foulant devices included with standard shipment; these are spares.
Useful life varies, depending on several factors. We recommend that customers consider more frequent replacement when high biological activity & strong current flow (greater dilution of anti-foulant concentration) are present. Moored instruments in high growth & strong dilution environments have been known to obtain a few months of quality data, while drifters that operate in non-photic, less turbid deep ocean environments may achieve years of quality data. Experience may be strongest determining factor in specific deployment environments.
50441 SBE 37 & 44 lithium batteries (spare), package of twelve 3.6V AA cells (Saft LS 14500)

One set of batteries is included with standard shipment; 50441 are spares. Batteries are easily accessed by removing 2 screws from connector end cap & pulling out end cap. Shipping restrictions apply for lithium batteries; see SBE 37-SMP-ODO manual for details. Click here to buy Saft LS 14500 from Amazon.

801863 is battery holder, without batteries. Battery holder is included with standard shipment; this is a spare.
Note: Other MicroCATs use a battery pack with a red cover plate; the wiring of that pack is different from this one, and cannot be used with ODO MicroCATs (37-IMP-ODO or 37-SMP-ODO).


801863 shown with 50441 cells installed
(Note: Cells cannot be shipped
installed in battery holder)


Cells packed in heat-sealed plastic (above),
then placed in bubble-wrap outer sleeve &
strong packaging for shipment (below)

801863 Yellow top battery holder (14V nominal, Version 2) for use with twelve 3.6V AA lithium cells, for pumped SBE 37 (SMP & IMP with firmware version > 4.0 & all SMP-ODO, IMP-ODO, SMP-IDO, & IMP-IDO)
801385 Data/Power interface cable, RMG-4FS to DB-9S & red/black twisted wire leads, 2.4 m (DN 32277) Included with standard shipment if 37SMP.xx1xx (XSG connector) and 37SMP.xxx0x or  37SMP.xxx1x (RS-232 or RS-485 interface) selected; this is spare.
801206 Data/Power interface cable, Wet-Pluggable, MCIL-4FS to DB-9S & red/black twisted wire leads, 2.4 m (DN 32366) Included with standard shipment if 37SMP.xx2xx (MCBH connector) and 37SMP.xxx0x or  37SMP.xxx1x (RS-232 or RS-485 interface) selected; this is spare.
802220 Data/Power interface cable for RS-232 and SDI-12 interface, Wet-pluggable, MCIL-6FS to DB-9S & red/black twisted wire leads, 2.4 m (DN 33733) Included with standard shipment if 37SMP.xx2xx (MCBH connector) and 37SMP.xxx2x (SDI-12 interface) selected; this is spare.
20200 USB to Serial Port Adapter, FTDI UC232R-10 (connects computers with USB ports to RS-232 instruments) Many newer PCs & laptop computers have USB port(s) instead of RS-232 serial port(s). USB serial adapter plugs into USB port, & allows a serial device to be connected through adapter. Multi-port adapters are available from other companies; see Application Note 68.
31632 Storm Shipping Case (iM2950) - holds up to 3 SBE 37SMP-ODOs

Case holds only 3 ODO MicroCATs
(photo shows 4 non-ODO MicroCATs)

Storm shipping case with custom foam inserts holds up to 3 ODO MicroCATs — IMP-ODO, SMP-ODO, SIP-ODO.

  • Injection molded case with HPX resin plastic body, recessed wheels, automatic pressure equalization valve, hinged push-button latches, fold-down padded handle, & O-ring seal. Meets airline luggage regulations.
  • Inner dimensions:
    29 x 18 x 10.5 inches (74 x 46 x 27 cm).
  • Outer dimensions:
    31.3 x 20.4 x 12.2 inches (80 x 52 x 31 cm).