SBE 37-SIP MicroCAT C-T (Pressure optional) Sensor
Configuration Details

• Serial Interface (RS-232 standard, RS-485 optional)
• internal, integral Pump -- Pump provides improved conductivity response & improved anti-foul protection over 37-SI.

Note that 37-SIP does not include memory or internal batteries. See 37-SMP for comparable instrument with memory & internal batteries.

For photos of standard shipment, click here.

Pressure sensor is installed in end cap, & is not field replaceable / swappable. While highest pressure rating gives you most flexibility in using 37-SIP, 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)

SBE 37-SIP Alternate Serial Interface Option

SBE 37-SIP Mounting Bracket Options (Specify mount clamp wire size to match the O.D. of the wire jacket)

Cable fits loosely through wire guide, & is clamped only at mounting clamp. See document 67094 for mechanical details.

Thread for clamping to mooring cable:

• 37SIP-1b (1/4 in. diameter): 1/4-28 UNF
• 37SIP-1c (5/16 in. diameter): 5/16-24 UNF
• 37SIP-1d (3/8 in. diameter): 3/8-24 UNF
• 37SIP-1e (1/2 in. diameter): 9/16-12 UNC
• 37SIP-1f (6 mm diameter): 1/4-20 UNF
• 37SIP-1g (8 mm diameter): 5/16-24 UNF
• 37SIP-1h (10 mm diameter): 7/16 -14 UNF
• 37SIP-1i (12 mm diameter): 1/2-13 UNF
• 37SIP-1j (16 mm, 5/8 in. diameter): 5/8-18 UNF

Wet-pluggable connectors may be mated in wet conditions. Their pins do not need to be dried before mating. By design, water on the connector pins is forced out as the 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 our standard (Impulse XSG/RMG) connectors. Like standard connectors, wet-pluggables need proper lubrication & require care during use to avoid trapping water in sockets.

37SIP-5 includes a data I/O cable compatible with wet-pluggable data I/O connector.

801263 -- Some users prefer battery snap connector instead of red/black twisted wire leads. If 37SIP-5 (wet-pluggable connector) specified, order 801263 in place of 801206 if desired.

801385 -- Included with standard shipment; this is spare.

801206 -- Included with standard shipment if 37SIP-5 (wet-pluggable connector) specified; this is spare.