Signal Conditioner [90131]

Model 90131 Bridge sensor is a self-contained, AC powered, signal conditioning module for bridge type sensors. It contains a precision differential instrumentation amplifier with filtered output and a highly regulated low noise, adjustable output bridge excitation source. The unit is completely encapsulated for use in rugged environments. The output filter cutoff frequency is 200 Hz and may be lowered by adding two external capacitors.


  • Stable and accurate
  • 2 kHz frequency response
  • Rugged, compact, and fully encapsulated
  • Includes excitation and amplification
  • Easy to use screw terminations


 Gain range  40-250
 Gain temperature coefficient  250 ppm/C
 Output offset – Tare
 Range  -5V to +2V
 Drift  +/-0.2 mV/C
 Common mode rejection
 Gain + 40(DC-60 Hz)  90dB
 Gain = 250(DC-60 Hz)  100dB
 Rated output (2k load)  +/-10V
(4-20 mA available)
 Frequency response (to -3dB)
 2 pole Bessel Filter  2 kHz
 Common mode input voltage  +/- 10V
 Excitation supply  4 to 15 VDC
 Excitation current  120 mA maximum
 Line isolation  500 VDC
 Operating temperature  0C to 70C
 Storage temperature  -25 C to +85C
 Weight  18 oz. (150 grams)
 Size 3.75”L x 2.0”W x 3.0”H