SBE 39-IM Temperature (Pressure optional) Recorder with Inductive Modem
Configuration Details

Communicating with 1 or more 39-IMs requires use of Sea-Bird Surface Inductive Modem (SIM), which provides serial interface (RS-232 or RS-485) between user’s computer & up to 100 IM instruments coupled to single cable. Purchase SIM & optional Inductive Cable Coupler (ICC) separately.

Also see:

• SBE 39 for version with RS-232 interface in place of Inductive Modem interface.
• SBE 37-IM and 37-IMP MicroCATs for CTD (conductivity, temperature, and optional pressure) with inductive modem interface.
• SBE 16plus-IM V2 SEACAT for CTD with inductive modem interface and auxiliary sensor input capability.
• SBE 44 Underwater Inductive Modem to integrate an RS-232 sensor with Sea-Bird's inductive modem telemetry system.

SBE 39-IM Housing Selections -- MUST SELECT ONE

Pressure sensor is installed in end cap, & is not field replaceable / swappable. While highest pressure rating gives you most flexibility in using 39-IM, 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)

Cable fits loosely through IM coupling core / wire guide, & is clamped only at mounting clamp. See document 67161.

SBE 39-IM shown with option 39IM-1a (600 m plastic housing) & 39-IM-2b (External thermistor, in pressure protected sheath).

Net fender retains half the mooring clamps & half the inductive modem coupler. All hardware is captured within, guaranteeing no loss of nuts or bolts during deployment. Attach 39-IM to mooring cable in 2 steps:

1. Place net fender & attached clamp(s) against mooring line. Push SBE 39-IM into clamp guides.
2. Holding SBE 39-IM & net fender with 1 hand, tighten clamp bolts with a driver in free hand.

SBE 39-IM Accessories

• Injection molded case with HPX resin plastic body, automatic pressure equalization valve, hinged push-button latches, fold-down padded handle, & O-ring seal. Meets airline luggage regulations.
• Inner dimensions:
  20 x 14 x 7.7 inches (51 x 36 x 20 cm).
• Outer dimensions:
  21.2 x 16 x 8.3 inches (54 x 41 x 21 cm).

Note: SBE 39-IM in net fender does not fit in Storm shipping case.