Guided Wave Radar Level Transmitters


Gems Sensors Controls

Info Quote



Guided Wave Radar Level Transmitters


Gems Sensors Controls

Radar Level Sensor for Continuous, Non-Contact Tank Level Sensing Applications


  • Compact Design - small footprint for flexibility in restricted spaces.
  • Easy to Configure - simplified programming and setup via Bluetooth connection; run diagnostics to view signal strength and tank obstructions.
  • Premium Housing Material - PVDF housing material grants high temperature resistance and chemical inertness to most medias.
  • Pulsed Radar System - no contact required, no moving parts and reliable continuous sensing in the toughest applications.

Available in a compact design constructed from chemically inert PVDF material, the RLI-80 non-contact radar sensor works in tanks up to 15 meters (49.21 ft) deep! It’s simplified programming and setup via Bluetooth® connection makes installation quick and easy. In addition, it can run diagnostics to view signal strength and tank obstructions. Read below to learn more about Radar Technology and its benefits over other sensing technologies.

Features & Benefits:

  • Non-contact design means no media ever encounters the Radar sensor. This eliminates the need to worry about material compatibility between the media and sensor components.
  • The non-contact design is by default a no moving parts solution, which eliminates the potential for any mechanical failures from a float-based sensor.
  • The non-contact design also eliminates the need to use large floats with long stems, decreasing shipping cost and shipping transit time. This also makes installation time a fraction of the time saving countless labor hours.
  • Infinitely configurable to match any tank depth up to 15m eliminates the need to source multiple level transmitters, reducing inventory and sourcing costs.
  • Also, since it never comes in contact with the media, there are no issues with debris coating or causing a float to get stuck.
  • Radar through the air technology is a very accurate sensing technology and can detect liquid level within 5mm, with no effect on its accuracy based on changes in temperature or pressure.
  • Radar technology is not affected by condensation or dust in the air like ultra-sonic based sensors.

Technical Specifications:

  • Materials of Construction – PVDF housing with FKM seal.
  • Sensor Size – 3.19" (81mm) diameter by 6.04" (153.4mm).
  • Sensor Beam Angle – 8°.
  • Mounting Types – 2" NPT (process) and 1 1/4"-12 (bracket mounting).
  • Ingress Protection - sealed to IP67.
  • Sensing Range – from 1' (0.3M) minimum depth to 49.21' (15M) maximum range.
  • Output Options – standard 4 to 20 mA (2-Wire) or Modbus (4-Wire).
  • Accuracy – ±0.02" (5mm).
  • Sensor Programming - PC via GemsView or smartphone, tablet or PC via Bluetooth.

Example Applications:

  • Water and Wastewater
  • Oil and Gas Drilling Tanks
  • Cooling Towers
  • Oil Recovery Trucks and Tank Farms
  • Commercial Marine
  • Power Generators
  • Food and Beverage Processing Tanks
  • Hydraulic Power Units
  • Agriculture Equipment
  • Commercial Chlorine Generators

For an overview on how this level sensor compares to other technologies available on the market place, please see our comparison chart below:

Level Sensor Comparison

To watch our introductory product overview video, please see below:

Our partner Gems Sensors is a global supplier of sensing and control solutions. Gems designs and manufactures a broad portfolio of liquid level, flow and pressure solutions. From agricultural equipment to locomotives to medical devices, Gems products make a difference in the world you interact with every day. Gems Sensors offers OEM manufacturing services to meet the quality, quantity, and cost objectives of your product, assembly or system. They have the necessary in-house capabilities to manufacture short-runs to mid or high volumes of your custom liquid level, pressure, and flow sensors, as well as switches and solenoid valves, with short lead times.


Request a quote
Request a call back

Why choose Boiswood

Quality Products & Service Levels
World-class quality products backed by unrivalled service levels. We only partner with the best manufacturers in industry. You can trust in our 30+ years of experience.
Competitive Pricing Structures
Competitively priced products that we strive to keep consistent. We always ensure special pricing structures are considered.
Excellent Delivery Schedules
Attractive lead times that are monitored and managed, ensuring customers receive on-time deliveries. We can also ship our products internationally.
Ultra-Fast Response Times
Tired of chasing for answers? We pride ourselves on our unmatched response times. You can rely on us to provide extremely quick answers to technical and commercial queries.
Free Technical Support
On-going support for our customers to meet any evolving technical requirements. We can help size and specify solutions for even the most bespoke applications.
OEM & Custom Configurations
We sit alongside design teams to specify the right solution for your application, no matter how demanding. Whether it’s out-of-the-box or a custom design, we are up for the challenge.
Tailored Stocking Profiles
Need your products tomorrow? We’ve got you covered with our ever-growing stock profile and product portfolio. We can hold stock for you based on your consumption rates.
Servicing & Assembly Capabilities
Official and manufacturer certified in-house servicing, testing and assembly for our core products, including custom panels and subassemblies.
Get to Know us and Let us help you