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SWI TR30240 Series | Resistive Output Float Level Transmitter

USA Toll Free: 1-800-730-0302 Tel: 416-240-1920 -

Sensors and Switches are mechanical-type sensing devices that do not require power to operate. Engineered based on time-proven principles such as buoyancy, conductivity, magnetic latching, capacitance and more, SWI sensors and switches are manufactured to provide reliable industrial process measurement year after year. Click on a sensing device below to learn more about our available sensors and switches product line.

SWI TR30240 Series | Resistive Output Float Level Transmitter


The vertically-mounted TR30240 is a reed switch type transmitter designed to provide fuel level output to gages in marine and stationary engine tank applications. Its two-wire resistive probe delivers a proportional 30-240 Ohm output with alternate resistance ranges available. Constructed in 316 stainless steel or brass materials, the TR30240 can be paired with a stainless steel or Buna-N float to accommodate various temperature and pressure needs. Additional high and low-level switch points, construction materials and probe lengths up to 120" are also possible. Custom resistance curves for linear and nonlinear tanks can be provided.

Principles of Operation

The unit contains a series of magnetic reed switches with its sealed probe. As the float travels with the media level inside the tank, its internal magnets actuate the reed switches and vary the resistance of the output.

SWI TR30240 Series


  • Two-Wire Resistive Probe
  • Probe Lengths Up to 10 Feet
  • No Calibration Required
  • Optional Resistive Ranges Available


  • Stationary Engine Fuel Tanks
  • Marine Equipment
  • Agricultural Equipment


  • Storage Temperature: -50º to +180º F (-45º to +82º C)
  • Humidity: 0 to 99%, Non-Condensing


TR30240 Brass Buna-N  -40º to +180º F (-40º to +82º C)  -40º to +175º F (-40º to +80º C) 150 PSIG (10.3 bar) 0.77
TR30240 316 Stainless Steel 316 Stainless Steel  -40º to +300º F (-40º to +148.9º C)  -40º to +175º F (-40º to +80º C) 750 PSIG (51.7 bar) 0.80
TR30240 316 Stainless Steel 316 Stainless Steel  -40º to +300º F (-40º to +148.9º C)  -40º to +175º F (-40º to +80º C) 750 PSIG (51.7 bar) 0.90


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Metex Corporation Limited has been providing superior products and services to the process control, chemical treatment, waste water, industrial and manufacturing industries for over 25 years. It is our goal to continually provide our customers with the best possible equipment, technology, and service.


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