SA 120R

SA 120R

  • Miniature MWD Sensors
  • Operational to 125°C
  • Low Cost and High Performance
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The Columbia Models SA-120R and SA-120RNP Force Balance Accelerometers have been designed as Measurement While Drilling (MWD) sensors for use in downhole well service applications. These sensors are completely self-contained and require no additional signal conditioning.

The Models SA-120R and SA-120RNP Accelerometers are extremely rugged and will survive severe shock and vibration exposures. The Model SA-120RNP provides optimum accuracy and repeatability in high temperature environments up to +125 degrees C. Refer to Columbia Model SA-120RHT for extreme high temperature applications up to 200 degrees C. Consult the factory for customized versions of these sensors.


Output Impedance <5000 Ohms
Ranges Available +1 G To +10 G
Output Voltage +5 Volts into 100K Load
Excitation +15 VDC <20 mA
Sensitive Axis Alignment Better Than 0.5 Deg
Scale Factor Tolerance +1%
Scale Factor Temp Coefficient 0.025% / Deg C Max.
Zero Bias +0.1% F.R.
Current Output 0.001% F.R./ Deg C
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