WellSens II - Surface readout unit for fiber optic sensors

Robust & high reliability multi-channel signal conditioner for harsh environment

Multi-channel signal conditioner

The WellSens Gen II is a robust and reliable multi-channel signal conditioner. It is compatible with Opsens’ harsh environment interferometric fiber optic pressure and temperature sensor, the OPP-W. The WellSens Gen II can operate in a wide range of ambient temperatures from -20°C to +60 °C.

The wide operating temperature and low power consumption, make it ideal for remote applications operating on solar panels or generators. The modular DIN rail design allows for seamless expansion with growing requirements. The high precision, small foot print, fast sampling rates and ease of use make it the solution of choice for oil field or industrial process applications.

Key Features

  • High linearity, precision, with fast sample rates.
  • Expandable up to 128 channels.
  • Modular DIN rail design.
  • Flexible – supports current & future WLPI products (P/T, Displacement and Strain sensors).
  • Wide operating temperature range.
  • Low Power – <12W for 2 channel (no display).
  • Ideal for remote applications utilizing solar panel
  • Supports a variety of interface and communication protocols including RS485, TCP/IP, & ModBus.
  • Application Control— programmable alarms and I/O options.


  • Downhole sensing solutions
  • CO2 storage (reservoir surveillance)
  • Downhole monitoring in thermal EOR (Enhanced Oil Recovery)
  • Intelligent and smart field instrumentation
  • Hazardous and strong EMI/RFI/MRI environments
Number of channels

Up to 128 channels


OPP-W, OTP-W and OEP fiber optic sensors

Full Scale

30 000 nm (path lenght difference)


± 0.003 % of F.S. (no averaging)


± 0.01 % of F.S. @ ± 3.3 sigma limit (99.9% confidence level)

Sampling rate

Up to 20 Hz

Output interface

RS-485, RS-232 and Ethernet (TCP/IP)

Communication protocol

Modbus and SCPI

I/O and control option

Various analog and digital outputs (4-20 mA, ±10 V, etc.)

Data storage

Up to 8 Gb (in option)


LCD screen display (in option)

Input power

24 VDC or 85-264 VAC


10 W + 1W x number of channels (Ex.: 16-CH unit = 26 W)

Storage temperature

-40 °C to 70 °C

Operating temperature

-20 °C to 60 °C (-40 °C option available on request)


95 % non condensing

Opsens Solutions Inc. reserves the right to make any changes to the above specifications without prior notice.

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