Mil-Spec UAV 5-Bolt Fuel Level Sensor

A mil-spec capacitive fuel level sensor with MIL-DTL-38999 connector designed specifically for defence UAV platforms. IP68 rated and custom-built to 700mm long.

  • Mil-Std EMC Certified
  • Continuous, solid-state sensing
  • 0-5V Analog, CAN or Analog and CAN Outputs
  • Accuracies of ±1% of reading (±0.5% accuracy variants available)
  • -40°C to +125°C operating temperature range (-55°C to +150°C option available)
  • IP68 rated
  • MIL-DTL-38999 connector



The LSM500-38999 is a mil-spec liquid level sensor harnessing the latest advancements in capacitive sensing technology. Featuring a 5-bolt mounting configuration for a secure fitment, the robust sensor is constructed from anodised aluminium with an integrated MIL-DTL-38999 connector for plug-and-play installation. Certified to MIL STD 461G and RCTA DO160F, the LSM500-38999 is ideal for a wide variety of defence UAV and ground vehicle platforms.

Boasting advanced accuracies of ±1% of reading (±0.5% accuracy variants available), many existing airframe manufacturers and UAV platforms rely on Reventec capacitive liquid level sensors to manage fuel efficiently for ultimate range extension, allowing them to fly further for longer. Vital vehicle systems health and performance monitoring ensures that vital fluid critical to the smooth running of the vehicle is within safe limits, enables early detection of leaks and reduces breakdowns mid-flight.

The LSM500-38999 is engineered to deliver dependable liquid level readings in extreme environments. With rugged construction, the IP68 rated sensor is highly vibration tolerant and shock resistant with an operating temperature o f-40°C to +125°C (-55°C to +150°C option available). The device is custom-built to 1000mm long and designed to easily fit within tank spatial and mounting requirements. Integrated electronics within the compact sensor head deliver analog, CAN, or analog and CAN outputs without the need for external CPU processing.

Reventec capacitive liquid level sensors’ measurement accuracy is unaffected by physical orientation allowing for convenient placement within fuel, oil and coolant tanks. 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, and are highly vibration and shock tolerant. The LSM500-38999 is calibrated in the destined fluid for ultimate accuracy and plug-and-play installation for a variety of defence UAV platforms.

The LSM500-38999 is well-suited to all common automotive and UAV fuel and oil types including; Gasoline, AVGAS, JET-A, JP-4 and JP-8.


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 LSM500-38999 is available in two accuracy specifications:

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


LSM Capacitive Liquid Level Sensors

The LSM500-38999 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. 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.


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