Consent Preferences


Applications for Rochester Sensors's Guided Wave Radar Fuel Level Sender

The 9402 series guided wave radar (gwr, gen ii) transmitter provides technical advantages over traditional reed switch probe liquid level sensors. The 9402 gwr sensor utilizes digital technology and requires minimal maintenance, while providing high accuracy measurements in mechanically challenging tanks. It features an anodized aluminum header and a stainless-steel waveguide. The wetted components are suitable for a range of fluids including diesel, biodiesel, synthetic oils, mineral oils, coolants, water, and mildly acidic or corrosive media. The 9402 sensor is highly configurable and can be customized for specific applications, including the selection of probe length and electrical outputs. The device is designed for stationary applications and is ideal for fuel monitoring for remote backup generators, particularly for tanks with pre-existing small access ports. The low-profile head design extends less than 1″ above the tank, and the side cable exit eliminates vertical clearance concerns for industrial systems.

  • Constrained mechanical environments without room for a float
  • Multiple fluid types
  • Back-up & remote generators
  • Industrial process control
  • Agricultural equipment
  • Heavy industrial equipment
  • EV charging stations

Data Sheet
Configurator Sheet
Guided Wave Radar II


Mechanical Specifications

Length/Sensing Range: Configurable up to 3 meters
Operating and Storage Temp: -40°C to +85°C
Sealing IP6K9K
Max Tank Pressure 15 PSI


Housing Die Cast Aluminum with optional Level III anodization
Sensor Tube 304 SS
Wetted Materials Anodized Aluminum, 304 SS, Acetal, Viton
Cable Flying leads with 3 wires: Brown: Power
Black: Ground
Blue: Signal

Performance Specifications:

Precisión +/- 3.0% FS
Resolution < 2mm

Ordering Options:

Performance Specifications:

Mounting options: • 5-bolt SAE
• 1” NPT thread (adapter flange)
• Contact factory for additional mounting options
Salida • 0.5 to 4.5V (0-5V available)
• Optional 3-wire 4-20 mA output
• Linear output standard
Cable Length • 610 mm (24”) standard cable (flying leads)
• 250 mm to 5 m
• Optional connector at customer request

* Materials and specifications are subject to change without notice. Pressure ratings are subject to change due to temperature and other environmental considerations.

Product Inquiry - 9402

    Revised 04/8/2023