Mil-Spec UAV 2-Bolt Coolant Level Sensor

A rugged capacitive liquid level sensor specifically designed for continuous coolant level measurement in extreme environments. IP69K rated.

  • IP69K rated for extreme environments
  • Continuous, solid-state technology
  • 2-bolt mounting format
  • 0-5 VDC Analog, CAN or Analog and CAN Outputs
  • Mil-Std EMC Certified
  • Measurement accuracy unaffected by physical orientation of the sensor
  • -40°C to +125°C operating temperature range (-55°C to +150°C variant available)



The LSM200-IP69K is a rugged coolant level sensor engineered specifically for defence UAV platforms. Designed to last, the sensor is constructed from hard anodised aluminium and is IP69K rated to protect against dust ingress, high temperatures and high pressure liquids.

Leveraging the latest advancements in capacitive sensing, the LSM200-IP69K utilises technology proven in established UAV and airframe platforms. The LSM200-IP69K offers powerful fluid monitoring with accuracies of ±1% of reading (±0.5% accuracy variants available) in a compact, lightweight device with sturdy 2-bolt mounting fixing. Reliable, real-time readings allow operators to optimise their mission with continuous fluid level measurement for serious range extension allowing UAV manufacturers to fly further for longer. Integrated electronics encased within the sensor head deliver analog, CAN or analog and CAN outputs 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. With superior dependability in the most extreme conditions, the LSM200-IP69K  is shock resistant, vibration tolerant and has a 2 bar differential tank pressure rating (up to 10 bar pressure ratings are available).

As a solid-state technology, the sensor is insensitive to orientation allowing for sensor fitment to fuel tanks at any angle, including inverted, for easy installation and access whilst maintaining high measurement accuracy. The LSM200-IP69K is factory-calibrated in the customer-specified liquid type so that it is ready for installation on arrival.

The LSM200 is well-suited to all common automotive and UAV fuel, oil and coolant types including; Gasoline, AVGAS, JET-A, JP-4, JP-8 and 50/50 Glycol.

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-IP69K is available in two accuracy specifications:

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

The LSM200-IP69K is manufactured with a flying lead as standard but can be customised to fit a range of connector types dependent on requirement, including MIL-DTL-38999 connectors.

LSM Capacitive Liquid Level Sensors

The LSM200-IP69K 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-IP69K 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: