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SBE 37-SI and SIP MicroCAT

SBE 37-SI and SIP MicroCAT
The SBE 37-SI/SIP MicroCAT is a high-accuracy conductivity and temperature (pressure optional) recorder with Serial interface (RS-232 or RS-485), memory, and an optional pump. Externally powered, it can be used for moored applications requiring fast sampling. The MicroCAT is useful as a stand-alone monitoring device and is easily integrated with other instrumentation platforms.

Data is output in real-time and can be recorded in memory; memory capacity exceeds 530,000 samples. Measured data and derived variables (salinity, sound velocity, depth, density) are output in engineering units.
 

SBE 37 Change Notice

Model 37-SI 37-SIP 37-SIP-ODO
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 – none1 – 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 – none1 – 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
0 – RS-232
SBE 63 Optical
Dissolved Oxygen
0 - none 0 – none 1 – IDO (based on SBE 43)
SBE 37-SI MicroCAT C-T (P) Recorder

Example: 37SI.13100 is an SBE 37-SI 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
37SI

MicroCAT C and T (pressure optional) Sensor with Serial Interface - Includes 8 MB Flash memory, serial interface, data/power cable (cable may be deleted for credit), AF24173 Anti-Foulant Devices, Seasoft software, & complete documentation.

37-SI MicroCAT includes:

  • Serial Interface
  • Memory

Note: 37-SI does not include internal batteries.

Compare features of the numerous SBE 37 MicroCAT models.

SBE 37-SI Housing (depth) Selections MUST SELECT ONE
37SI.1xxx0 350 m plastic housing  
37SI.3xxx0 7000 m titanium housing  
SBE 37-SI Pressure Sensor Range (depth) Selections — MUST SELECT ONE
37SI.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)
37SI.x1xx0 20 m strain gauge pressure sensor
37SI.x2xx0 100 m strain gauge pressure sensor
37SI.x3xx0 350 m strain gauge pressure sensor
37SI.x4xx0 600 m strain gauge pressure sensor
37SI.x5xx0 1000 m strain gauge pressure sensor
37SI.x6xx0 2000 m strain gauge pressure sensor
37SI.x7xx0 3500 m strain gauge pressure sensor
37SI.x8xx0 7000 m strain gauge pressure sensor
SBE 37-SI Connector Selections MUST SELECT ONE
37SI.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

37SI.xx2x0 Wet-pluggable (MCBH) connector (includes data/power interface cable 801206)
SBE 37-SI Communications Selections— MUST SELECT ONE
37SI.xxx00 RS-232 serial interface Note: Each interface version of 37-SI has a separate manual.
37SI.xxx10 RS-485 (half duplex ONLY) serial interface Two-wire, RS-485 interface provides communication with individual 37-SI or with all 37-SIs 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-SI has a separate manual.
SBE 37-SI Mooring Clamp Wire Size Options (Specify clamp to match O.D. of mooring wire jacket)
50264.I 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.

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. (photo is of 37-SIP; 37-SI is similar). '.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).

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
SBE 37-SI 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.
233540 Anti-foulant cap without hose barb, black (for use with SBE 37 [SM, SMP, IM, IMP, SI, SIP] with firmware version < 4.0) 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)!
801376 Data/Power interface cable, RMG-4FS to DB-9S & 9V battery snap, 2.4 m (DN 32604) Some users prefer battery snap connector instead of red/black twisted wire leads. Order 801376 in place of 801385 if desired.
801263 Data/Power interface cable, Wet-Pluggable, MCIL-4FS to DB-9S & 9V battery snap, 2.4 m (DN 32490) Some users prefer battery snap connector instead of red/black twisted wire leads. Order 801263 in place of 801206 if desired.
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 37SI.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 37SI.xx2x0 (MCBH connector) selected; this is spare.
801378 Data / Power interface cable, shielded, RMG-4FS to DB-9S & red/black twisted wire leads, 20 m(DN 32720) Longer, shielded cable for use if if 37SI.xx1x0 (XSG connector) selected.
801850 Data / Power interface cable, shielded, MCIL-4FS to DB-9S & red/black twisted wire leads, 20 m (DN 33404) Longer, shielded cable for use if if 37SI.xx2x0 (MCBH connector) selected.
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-SI 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 37SIs

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-SIP MicroCAT C-T (P) Recorder

Example: 37SIP.13100 is an SBE 37-SIP 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
37SIP

MicroCAT C and T (pressure optional) Sensor with Serial interface and Internal Pump - Includes 8 MB Flash memory, serial interface, data/power cable (cable may be deleted for credit), AF24173 Anti-Foulant Devices, Seasoft software, & complete documentation.

37-SIP MicroCAT includes:

  • Serial Interface
  • Memory
  • internal, integral Pump

Note: 37-SIP does not include internal batteries.

Compare features of the numerous SBE 37 MicroCAT models.

SBE 37-SIP Housing (depth) Selections MUST SELECT ONE
37SIP.1xxx0 350 m plastic housing  
37SIP.3xxx0 7000 m titanium housing  
SBE 37-SIP Pressure Sensor Range (depth) Selections — MUST SELECT ONE
37SIP.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)
37SIP.x1xx0 20 m strain gauge pressure sensor
37SIP.x2xx0 100 m strain gauge pressure sensor
37SIP.x3xx0 350 m strain gauge pressure sensor
37SIP.x4xx0 600 m strain gauge pressure sensor
37SIP.x5xx0 1000 m strain gauge pressure sensor
37SIP.x6xx0 2000 m strain gauge pressure sensor
37SIP.x7xx0 3500 m strain gauge pressure sensor
37SIP.x8xx0 7000 m strain gauge pressure sensor
SBE 37-SIP Connector Selections MUST SELECT ONE
37SIP.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

37SIP.xx2x0 Wet-pluggable (MCBH) connector (includes data/power interface cable 801206)
SBE 37-SIP Communications Selections— MUST SELECT ONE
37SIP.xxx00 RS-232 serial interface Note: Each interface version of 37-SIP has a separate manual.
37SIP.xxx10 RS-485 (half duplex ONLY) serial interface Two-wire, RS-485 interface provides communication with individual 37-SIP or with all 37-SIPs 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-SIP has a separate manual.
SBE 37-SIP Mooring Clamp Wire Size Options (Specify clamp to match O.D. of mooring wire jacket)
50479.I 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.
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
SBE 37-SIP 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.
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-SIPs (firmware version > 4.0).
801376 Data/Power interface cable, RMG-4FS to DB-9S & 9V battery snap, 2.4 m (DN 32604) Some users prefer battery snap connector instead of red/black twisted wire leads. Order 801376 in place of 801385 if desired.
801263 Data/Power interface cable, Wet-Pluggable, MCIL-4FS to DB-9S & 9V battery snap, 2.4 m (DN 32490) Some users prefer battery snap connector instead of red/black twisted wire leads. Order 801263 in place of 801206 if desired.
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 37SIP.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 37SIP.xx2x0 (MCBH connector) selected; this is spare.
801378 Data / Power interface cable, shielded, RMG-4FS to DB-9S & red/black twisted wire leads, 20 m (DN 32720) Longer, shielded cable for use if if 37SIP.xx1x0 (XSG connector) selected.
801850 Data / Power interface cable, shielded, MCIL-4FS to DB-9S & red/black twisted wire leads, 20 m (DN 33404) Longer, shielded cable for use if if 37SIP.xx2x0 (MCBH connector) selected.
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-SIP 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-SIPs (firmware version > 4.0), because pressure port plug is behind mount clamp.
31632 Storm Shipping Case (iM2950) - holds up to 4 SBE 37SIs

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-SIP-IDO MicroCAT C-T-DO (P) Recorder

Example: 37SIP.13101 is an SBE 37-SIP-IDO with 350 m housing, 350 m strain gauge pressure sensor, XSG connector, RS-232 communications, and integrated SBE 43 Dissolved Oxygen Sensor. See table below for description of each selection:

PART # DESCRIPTION NOTES
37SIP-IDO

MicroCAT C and T (pressure optional) Sensor with Integrated Dissolved Oxygen sensor (IDO), Serial interface, and Internal Pump - Includes 8 MB Flash memory, serial interface, data/power cable (cable may be deleted for credit), AF24173 Anti-Foulant Devices, Seasoft software, & complete documentation.

37-SIP-IDO MicroCAT includes:

  • Serial Interface
  • Memory
  • internal, integral Pump
  • Integrated Dissolved Oxygen sensor based on SBE 43

Note: 37-SIP-IDO does not include internal batteries.

Compare features of the numerous SBE 37 MicroCAT models.

SBE 37-SIP-IDO Housing (depth) Selections MUST SELECT ONE
37SIP.1xx01 350 m plastic housing  
37SIP.3xx01 7000 m titanium housing  
SBE 37-SIP-IDO Pressure Sensor Range (depth) Selections — MUST SELECT ONE
37SIP.x0x01 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)
37SIP.x1x01 20 m strain gauge pressure sensor
37SIP.x2x01 100 m strain gauge pressure sensor
37SIP.x3x01 350 m strain gauge pressure sensor
37SIP.x4x01 600 m strain gauge pressure sensor
37SIP.x5x01 1000 m strain gauge pressure sensor
37SIP.x6x01 2000 m strain gauge pressure sensor
37SIP.x7x01 3500 m strain gauge pressure sensor
37SIP.x8x01 7000 m strain gauge pressure sensor
SBE 37-SIP-IDO Connector Selections MUST SELECT ONE
37SIP.xx101 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

37SIP.xx201 Wet-pluggable (MCBH) connector (includes data/power interface cable 801206)
SBE 37-SIP-IDO Mooring Clamp Wire Size Options (Specify clamp to match O.D. of mooring wire jacket)
50479.I 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.
50465.I Wire guide & mounting clamp for 1/4 in. diameter mooring wire

37-SMP-IDO shown; mooring clamp detail for 37-SIP-IDO 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
SBE 37-SIP-IDO 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.
801376 Data/Power interface cable, RMG-4FS to DB-9S & 9V battery snap, 2.4 m (DN 32604) Some users prefer battery snap connector instead of red/black twisted wire leads. Order 801376 in place of 801385 if desired.
801263 Data/Power interface cable, Wet-Pluggable, MCIL-4FS to DB-9S & 9V battery snap, 2.4 m (DN 32490) Some users prefer battery snap connector instead of red/black twisted wire leads. Order 801263 in place of 801206 if desired.
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 37SIP.xx101 (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 37SIP.xx201 (MCBH connector) selected; this is spare.
801378 Data / Power interface cable, shielded, RMG-4FS to DB-9S & red/black twisted wire leads, 20 m (DN 32720) Longer, shielded cable for use if if 37SIP.xx101 (XSG connector) selected.
801850 Data / Power interface cable, shielded, MCIL-4FS to DB-9S & red/black twisted wire leads, 20 m (DN 33404) Longer, shielded cable for use if if 37SIP.xx201 (MCBH connector) selected.
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 37SIP-IDOs

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

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

  • 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).