Maintenance-free tank monitoring for all liquids
The fiber optic level measurement systems from Opsens Solutions are based on pressure measurement using white light interferometry technology.
The WaterSens solution for monitoring liquid levels can be used in almost any environment and delivers reliable results for decades. The “plug & forget” design means that the sensors can be operated permanently, without regular maintenance and servicing.
The measuring principle is simple: the liquid level is calculated from the hydrostatic pressure, which corresponds to the pressure exerted by the height of the liquid due to gravity. This pressure is determined using a patented technology based on Fabry-Pérot optical interferometry. This technology, known as WLPI (White Light Polarization Interferometry), is based on the phase modulation of light, the most sensitive method for fibre optic measurements.
Features
Robust design
High long-term precision, no drift-over-time
“Plug & Forget”, maintenance-free for decades of continuous operation
Remote operation
Suitable for hazardous environments, ATEX-compliant
No danger from lightning strikes due to electromagnetic immunity
Embedded optical temperature sensor for real-time compensation
±1 mm Measuring accuracy
Opsens OPP-C series
Fiber optic level sensor
Hydrostatic pressure measurement with optical sensors enables precise long-term monitoring of liquid levels.
The sensors are extremely robust and stable as well as immune to electromagnetic interference and lightning strikes. They are drift-free and require no maintenance during their decades-long service life - a decisive advantage for sensors that are often used in places that are difficult to access.
In combination with a simple stand-alone power supply system with solar panel and battery, the measuring system can also be used in remote locations where a power supply from the mains is not possible.
The configurable WaterSens solution can be easily automated for variable rate measurements and offers multiple communication interfaces for remote data transmission tools, from Wi-Fi to satellite antenna.
Applications:
- Dam/dike instrumentation
- Flood protection system
- Groundwater monitoring
- Wastewater management
- Corrosive liquids such as leaching processes
- LNG & fuel tanks
Opsens OPP-GD
Level sensor for fuel tanks and ATEX environments
By measuring the hydrostatic pressure and thanks to Opsens Solutions' optical differential sensor, it is possible to measure fuel levels in tanks with an accuracy of better than ± 1 mm, with absolute safety.
Based on the WaterSens solution, which uses fiber optic pressure sensors from Opsens Solutions to measure water levels, the OPP-GD sensors, specially developed and adapted for fuel tanks, offer extremely accurate, reliable and safe measurement. The sensors have no drift over time and require no maintenance or calibration - a true “plug and forget” system.
As this technology is completely dielectric, the sensors are intrinsically safe and can be used in potentially explosive environments (ATEX). The sensor is located outside the liquid container and is intrinsically safe (according to IEC 60079-28).
This measurement solution is so reliable that it will be used in the next generation of aircraft to measure critical parameters such as fuel level.
Applications:
- LNG tank instrumentation
- Level measurement in storage tanks
- Compatible with all types of explosive liquids (fuel oil, LNG, hydrogen...)
- Level measurement of aviation fuel
Opsens FieldSens-W
Compact, robust and multi-channel for all fiber optic WLPI sensors
FieldSens-W is a compact and robust multi-channel interrogator system that can be used with all interferometric fiber optic sensors from Opsens Solutions, i.e. the WLPI sensors, for temperature, pressure, strain and position measurements.
FieldSens-W is based on White Light Polarization Interferometry (WLPI) technology. It is extremely versatile, supports a wide range of fiber optic sensors and offers a sampling rate of up to 250 Hz (with one active channel). A maximum of 32 modules with up to 12 channels per module are possible (up to 384 channels).
The device offers multiple interfaces for remote control and real-time data acquisition: EtherCAT®, 10/100 Base-T Ethernet, USB, RS-232 and CAN FD. The open interface allows easy integration into existing external data acquisition software. An optional portable touchscreen display is also available for stand-alone configurations (useful for on-site maintenance or remote locations). The device is equipped with an internal memory to ensure the necessary autonomy.
Features
- Compact and robust design
- Versatile thanks to modular design with up to 384 channels
- EtherCAT®, Ethernet, USB interface, RS-232 and CAN FD
- Can be used in the housing under outdoor conditions
- Supports a wide range of sensors
Modular design enables both WLPI and GaAs technologies in the same system
Exemplary applications
- Geotechnical applications
- Civil engineering: Infrastructure monitoring
- Industry: automation and process control
- Portable or desktop devices
- High voltage conditions
- EMI, RFI and microwave environments
- Hazardous and nuclear environments
- Autonomous monitoring in remote areas
Opsens HandySens-W
Portable, highly reliable and multi-channel for all WLPI sensors
FieldSens-W is a compact and robust multi-channel interrogator system that can be used with all interferometric fiber optic sensors from Opsens Solutions, i.e. the WLPI sensors, for temperature, pressure, strain and position measurements.
The system is based on White Light Polarization Interferometry (WLPI) technology, supports a wide range of fibre optic sensors and offers a sampling rate of up to 250 Hz.
HandySens-W is equipped with a 5.0-inch touch screen and can be battery powered for remote monitoring projects. The single-channel signal conditioner can be controlled directly via the touchscreen display or remotely via the 10/100 Base-T Ethernet interface and/or USB for real-time data acquisition. The device is equipped with an internal memory to ensure the required autonomy at remote locations.
Features
- Compact and robust design
- Portable, battery-operated device
- Sampling rate up to 250 Hz
- Large, practical touchscreen display
- Ethernet and USB interface
- Supports strain, pressure, temperature and position sensors
Exemplary applications
- Geotechnical applications
- Civil engineering: Infrastructure monitoring
- Industry: automation and process control
- Portable or desktop devices
- High voltage conditions
- EMI, RFI and microwave environments
- Hazardous and nuclear environments
- Autonomous monitoring in remote areas