OPP-C Fiber optic pressure sensor

MEMS-based fiber optic pressure sensor and Piezometer for the harshest environments

The OPP-C pressure sensor is compatible with all Opsens Solutions’ WLPI (Patent #7,259,862) signal conditioners. This compact and very robust probe can be customized to specific customer requirements. The fiber optic extension cable can be a maximum length of 3 kilometers.

Opsens Solutions’ OPP-C, MEMS-based fiber-optic pressure sensor, is perfectly tailored to meet the challenges of pressure monitoring Applications in submerged and/or harsh environments.

The OPP-C sensor delivers long term accuracy, durability and high fidelity pressure measurements with a pressure operating range of up to 1,000 PSI.

It’s the prefect piezometer: Completely sealed, with a stainless steel body and diaphragm, the OPP-C is designed to work in adverse conditions of temperature, pressure, and toxic or corrosive atmospheres. It can be grounted in place if needed.

With the inherent advantages of fiber optic, it is not subject to interference from electromagnetic interference, vibrations and lightning that may be present in the sensing environment.


  • Maintenance free
  • No drift over time, reliable results during years
  • Intrinsically safe
  • Robust design
  • Can be located 3 km from the readout unit
  • Immune to EMI, lightning


  • Geotechnical applications
  • In-situ pressure monitoring for food processing
  • Harsh subsurface monitoring equipment
  • Hydrostatic pressure measurements with corrosive chemicals
  • Groundwater elevation surveillance in wells and streams
  • Pressure monitoring in pumping stations
  • Hazardous and nuclear environments
  • Offshore platform and refineries
Measuring range (other ranges available on request)

50 PSI

(345 kPa)

100 PSI

(690 kPa)

300 PSI

(2065 kPa)

500 PSI

(3500 kPa)

1 000 PSI

(7000 kPa)

Precision (Excluding thermal effect)

± 0.2% F.S.


< 0.02 % F.S. (Range dependant)

Thermal coefficient of Zero

< 0.03% F.S / °C  (from 10 °C to +65 °C)

Proof pressure

2 X F.S. (for up to 500 PSI F.S.); 1.5 X F.S. (for up to 1000 PSI F.S.)

Temperature operating range

-20 to +85 °C (other temperatures available upon request)

EMI/RFI Lightning

Complete immunity


Stainless steel : (Length from 123 mm to 220 mm depending on the model)  x (9.5 mm OD)


0.06 Kg (may be different depending on model)

Optical connector

LCA (Standard), SCA, SC, other connector available on request

Cable sheathing

From ruggedized flexible outdoor cable to robust stainless steel cable

Cable length

Up to 3 kilometers (Sampling rate dependent, consult factory for more details)

Signal conditioner compatibility

All Opsens Solutions’ WLPI signal conditioners

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

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