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SBE 37-IM/IMP/IMP-ODO MicroCAT

SBE 37-IM/IMP/IMP-ODO MicroCAT
The SBE 37-IM/IMP/IMP-ODO MicroCAT is a high-accuracy conductivity and temperature (pressure optional) recorder with integrated Inductive Modem (IM) interface, internal batteries, memory, optional pump, and optional optical dissolved oxygen sensor. The MicroCAT is designed for long-duration deployments on moorings.

Data is recorded in memory and can be transmitted when polled through inductive modem telemetry. Measured data are output in engineering units.

Memory capacity exceeds 530,000 samples. Sampling every 2 minutes, the MicroCAT can be deployed for 2 years (battery endurance exceeds memory capacity).
 

SBE 37 Change Notice

Model 37-IM 37-IMP 37-IMP-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 - 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 0 - none 0 - none 0 - none
Communications 0 - Inductive Modem 0 - Inductive Modem 0 - Inductive Modem
SBE 63 Optical
Dissolved Oxygen
0 - none 0 - none 2 - 600 m
3 - 5000 m
4 - 7000 m
SBE 37-IM MicroCAT C-T (P) Recorder

Example: 37IM.13000 is an SBE 37-IM with 350 m housing and 350 m strain gauge pressure sensor. See table below for description of each selection:

PART # DESCRIPTION NOTES
37IM

MicroCAT C and T (pressure optional) Recorder with Inductive Modem - Includes mooring clamp for jacketed wire, 8 MB Flash memory, lithium battery (non-hazardous), AF24173 Anti-Foulant Devices, Seasoft software, and complete documentation.

37-IM MicroCAT includes:

  • Inductive Modem interface
  • Memory

Communicating with 1 or more 37-IMs requires use of Sea-Bird Inductive Modem Module (IMM) or Surface Inductive Modem (SIM), which provide serial interface between user’s computer & up to 100 IM instruments coupled to single cable. Purchase IMM/SIM & optional Inductive Cable Coupler (ICC) separately.

Compare features of the numerous SBE 37 MicroCAT models.

SBE 37-IM Housing (depth) Selections MUST SELECT ONE
37IM.1x000 350 m plastic housing  
37IM.3x000 7000 m titanium housing  
SBE 37-IM Pressure Sensor Range (depth) Selections MUST SELECT ONE
37IM.x0000 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)
37IM.x1000 20 m strain gauge pressure sensor
37IM.x2000 100 m strain gauge pressure sensor
37IM.x3000 350 m strain gauge pressure sensor
37IM.x4000 600 m strain gauge pressure sensor
37IM.x5000 1000 m strain gauge pressure sensor
37IM.x6000 2000 m strain gauge pressure sensor
37IM.x7000 3500 m strain gauge pressure sensor
37IM.x8000 7000 m strain gauge pressure sensor
SBE 37-IM Mooring Clamp Wire Size Selections (Specify clamp to match O.D. of mooring wire jacket) — MUST SELECT ONE
50357.I Wire guide & mounting clamp for 1/4 in. diameter mooring wire

Cable fits loosely through IM coupling core / wire guide, & is clamped only at mounting clamp. See document 67142. '.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
50358.I Wire guide & mounting clamp for 5/16 in. or 8 mm diameter mooring wire
50359.I Wire guide & mounting clamp for 3/8 in. diameter mooring wire
50360.I Wire guide & mounting clamp for 1/2 in. diameter mooring wire
50362.I Wire guide & mounting clamp for 6 mm diameter mooring wire
50364.I Wire guide & mounting clamp for 10 mm diameter mooring wire
50365.I Wire guide & mounting clamp for 12 mm diameter mooring wire
50361.I Wire guide & mounting clamp for 5/8 in. or 16 mm diameter mooring wire
SBE 37-IM 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-IM 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-IM.


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
801836 37-IM/IMP/IMP-ODO/IMP-IDO and 39plus Internal Data I/O cable, 0.3 m (DN 33406) For uploading data quickly using internal RS-232 connector.
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: 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)!
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-IM 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 37IMs

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).
For Surface Inductive Modem (SIM), Inductive Modem Module (IMM), and Inductive Cable Coupler (ICC), see separate listings.
SBE 37-IMP MicroCAT C-T (P) Recorder

Example: 37IMP.13000 is an SBE 37-IMP with 350 m housing and 350 m strain gauge pressure sensor. See table below for description of each selection:

PART # DESCRIPTION NOTES
37IMP

MicroCAT C and T (pressure optional) Recorder with Inductive Modem, and internal Pump - Includes mooring clamp for jacketed wire, 8 MB Flash memory, lithium battery (non-hazardous), AF24173 Anti-Foulant Devices, Seasoft software, and complete documentation.

37-IMP MicroCAT includes:

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

Communicating with 1 or more 37-IMPs requires use of Sea-Bird Inductive Modem Module (IMM) or Surface Inductive Modem (SIM), which provide serial interface between user’s computer & up to 100 IM instruments coupled to single cable. Purchase IMM/SIM & optional Inductive Cable Coupler (ICC) separately.

Compare features of the numerous SBE 37 MicroCAT models.

SBE 37-IMP Housing (depth) Selections MUST SELECT ONE
37IMP.1x000 350 m plastic housing  
37IMP.3x000 7000 m titanium housing  
SBE 37-IMP Pressure Sensor Range (depth) Selections MUST SELECT ONE
37IMP.x0000 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)
37IMP.x1000 20 m strain gauge pressure sensor
37IMP.x2000 100 m strain gauge pressure sensor
37IMP.x3000 350 m strain gauge pressure sensor
37IMP.x4000 600 m strain gauge pressure sensor
37IMP.x5000 1000 m strain gauge pressure sensor
37IMP.x6000 2000 m strain gauge pressure sensor
37IMP.x7000 3500 m strain gauge pressure sensor
37IMP.x8000 7000 m strain gauge pressure sensor
SBE 37-IMP Mooring Clamp Wire Size Selections (Specify clamp to match O.D. of mooring wire jacket) — MUST SELECT ONE
50484.I Wire guide & mounting clamp for 1/4 in. diameter mooring wire

Cable fits loosely through IM coupling core / wire guide, & is clamped only at mounting clamp. See document 67220. '.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
50572.I Wire guide & mounting clamp for 5/16 in. or 8 mm diameter mooring wire
50489.I Wire guide & mounting clamp for 3/8 in. diameter mooring wire
50574.I Wire guide & mounting clamp for 1/2 in. diameter mooring wire
50571.I Wire guide & mounting clamp for 6 mm diameter mooring wire
50578.I Wire guide & mounting clamp for 10 mm diameter mooring wire
50579.I Wire guide & mounting clamp for 12 mm diameter mooring wire
50576.I Wire guide & mounting clamp for 5/8 in. or 16 mm diameter mooring wire
SBE 37-IMP 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-IMP 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; the wiring of that pack is different from this one, and cannot be used with 37-IMP 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-IMP 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
801836 37-IM/IMP/IMP-ODO/IMP-IDO and 39plus Internal Data I/O cable, 0.3 m (DN 33406) For uploading data quickly using internal RS-232 connector.
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-IMPs (firmware version > 4.0).
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-IMP 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-IMPs (firmware version > 4.0), because pressure port plug is behind mount clamp.
31632 Storm Shipping Case (iM2950) - holds up to 4 SBE 37IMPs

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).
For Surface Inductive Modem (SIM), Inductive Modem Module (IMM), and Inductive Cable Coupler (ICC), see separate listings.
SBE 37-IMP-ODO MicroCAT C-T-DO (P) Recorder

Example: 37IMP.13002 is an SBE 37-IMP-ODO with 350 m housing, 350 m strain gauge pressure sensor, 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
37IMP-ODO

MicroCAT C and T (pressure optional) Recorder with Integrated SBE 63 Optical Dissolved Oxygen sensor (ODO), Inductive Modem, and internal Pump - Includes mooring clamp for jacketed wire, 8 MB Flash memory, lithium battery (non-hazardous), AF24173 Anti-Foulant Devices, Seasoft software, and complete documentation.

37-IMP-ODO MicroCAT includes:

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

Communicating with 1 or more 37-IMP-ODOs requires use of Sea-Bird Inductive Modem Module (IMM) or Surface Inductive Modem (SIM), which provide serial interface between user’s computer & up to 100 IM instruments coupled to single cable. Purchase IMM/SIM & optional Inductive Cable Coupler (ICC) separately.

Compare features of the numerous SBE 37 MicroCAT models.

SBE 37-IMP-ODO Housing (depth) Selections MUST SELECT ONE
37IMP.1x00x 350 m plastic housing  
37IMP.3x00x 7000 m titanium housing  
SBE 37-IMP-ODO Pressure Sensor Range (depth) Selections MUST SELECT ONE
37IMP.x000x 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)
37IMP.x100x 20 m strain gauge pressure sensor
37IMP.x200x 100 m strain gauge pressure sensor
37IMP.x300x 350 m strain gauge pressure sensor
37IMP.x400x 600 m strain gauge pressure sensor
37IMP.x500x 1000 m strain gauge pressure sensor
37IMP.x600x 2000 m strain gauge pressure sensor
37IMP.x700x 3500 m strain gauge pressure sensor
37IMP.x800x 7000 m strain gauge pressure sensor
SBE 37-IMP-ODO Optical Dissolved Oxygen Sensor Selections MUST SELECT ONE
37IMP.xx002 600 meter  
37IMP.xx003 5000 meter
37IMP.xx004 7000 meter
SBE 37-IMP-ODO Mooring Clamp Wire Size Selections (Specify clamp to match O.D. of mooring wire jacket) — MUST SELECT ONE
50484.I Wire guide & mounting clamp for 1/4 in. diameter mooring wire

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

Cable fits loosely through IM coupling core / wire guide, & is clamped only at mounting clamp. See document 67220. '.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
50572.I Wire guide & mounting clamp for 5/16 in. or 8 mm diameter mooring wire
50489.I Wire guide & mounting clamp for 3/8 in. diameter mooring wire
50574.I Wire guide & mounting clamp for 1/2 in. diameter mooring wire
50571.I Wire guide & mounting clamp for 6 mm diameter mooring wire
50578.I Wire guide & mounting clamp for 10 mm diameter mooring wire
50579.I Wire guide & mounting clamp for 12 mm diameter mooring wire
50576.I Wire guide & mounting clamp for 5/8 in. or 16 mm diameter mooring wire
SBE 37-IMP-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-IMP-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)
801836 37-IM/IMP/IMP-ODO/IMP-IDO Internal Data I/O cable, 0.3 m (DN 33406) For uploading data quickly using internal RS-232 connector.
31632 Storm Shipping Case (iM2950) - holds up to 3 SBE 37IMP-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).
For Surface Inductive Modem (SIM), Inductive Modem Module (IMM), and Inductive Cable Coupler (ICC), see separate listings.