Mil-Spec UAV 2-Bolt Coolant Level Sensor

A robust capacitive liquid level sensor with a 2-bolt fixing for fuel and oil measurement in rugged defence UAV applications. Resistant to shock and extreme temperatures, this mil-spec instrument is custom-built up to 450mm long.

  • Continuous, solid-state capacitive sensing technology
  • 0-5V Analog, CAN or Analog and CAN Outputs
  • Hard anodised aluminium construction
  • IP68 rating
  • -40°C to +125°C operating temperature range (-55°C to +150°C variant available)
  • Measurement accuracy unaffected by physical orientation of the sensor
  • Mil-Std EMC Certified



Developed for defence UAV applications that require continuous, real-time liquid level measurement, the LSM200 is a high precision sensor designed to last. Featuring hard anodised aluminium construction, the vibration tolerant device benefits from its strength and lightweight properties offering a powerful IP68 fuel and oil level sensor.

Reventec’s solid-state capacitive technology is insensitive to orientation allowing for convenient, easy access placement of the instrument within fuel and oil tanks. The integrated electronics are housed within the sensor head allowing for an extremely small footprint without the need for external CPU processing. Both the probe and electronics have a high operating temperature of -40°C to +125°C, with -55°C to +150°C temperature variants available.

The LSM200 is well-suited to all common automotive and UAV fuel and oil types including; Gasoline, AVGAS, JET-A, JP-4 and JP-8. All Reventec liquid level sensors are calibrated in the intended liquid type for optimum performance and advanced accuracies of up to ±0.5% of reading. Non-standard fuel and oil calibrations are available for custom projects; please contact us for more information.

Reventec fuel and oil liquid level sensors have been the sensor of choice for many UAV and airframe manufacturers, allowing uncrewed aerial system operators to fly their aircraft further for longer. All capacitive liquid level sensors in our LSM range have 2 bar differential tank pressure ratings with up to 10 bar pressure ratings available upon request.

For ultimate dependability this measurement device has no moving parts that may deteriorate from wear. The continuous 100Hz measurement rate enables UAV operators to monitor the status of their tanks in detail allowing platforms to benefit from mission-ready capability for quick deployment.

EMC Approvals

EMC approvals for this device includes: MIL STD 461G Army Ground Limits: CS114, CS115, CS116, RE102, RS103, RS101, CE102, CS101, RTCA DO160F: Section 25 ESD Cat. A

Output Options

Output options include:

  • Analog 0-5V (typically calibrated 0.25V empty, 4.75V full)
  • CAN and Analog 0-5V
  • CAN only

Accuracy Options

The LSM200 is available in two accuracy specifications:

  • ±1% accuracy of reading
  • ±0.5% accuracy of reading

The LSM200 can be adapted and customised to fit a range of connector types dependent on requirement including MIL-DTL-38999 connectors.

LSM Capacitive Liquid Level Sensors

The LSM200 is a capacitive liquid level sensor in our military product range, equipping ground vehicle and UAV manufacturers with real-time measurement of vital vehicles components. Reventec has vast experience over the past decade delivering highly customised sensor solutions to our customers and have the expertise to design and build sensors to fit specific spatial constraints, liquid type requirements, connector and cabling requirements. Please contact us to discuss your requirements with a member of our team.


Defence Vehicle Health Sensors

The LSM200 is a capacitive liquid level sensor in our military product range, equipping ground vehicle and UAV manufacturers with real-time measurement of vital vehicle components. Discover how we help our customers to defend for longer in a variety of applications: