High Temperature Float Switches

Are You Looking For a High Temperature Float Switch?

Rochester Sensor’s high temperature float switches provide consistent reliable switch points in high temperature and other extreme applications. These sensors are made with durable stainless steel floats that slide on a stainless-steel stem. As the float moves over the high temperature rated internal switch, its built in magnetic field activates the reliable switch. High temperature level switches can be mounted on top of the tank, the side of the tank or from the bottom of the tank. High temperature rated Teflon wire or optional Kynar cable protects the lead wires as they exit the high temperature environment. These specially designed sensors can operate in temperatures up to 500F with special considerations.

Benefits of Using a Rochester Sensors High Temperature Float Switch

Rochester Sensor’s high temperature sensors are designed to maximize life cycles when operating in process temperature exceeding 300F. The high temperature design is highly reliable and are designed to a 1/8” tolerance and 1/16” repeatable accuracy. Our flexibility in design and manufacturing allows us manufacture your specific sensor to achieve your operation requirement while maximizing its quality in your application. Our custom sensors have many available options and features including built in optional temperature sensors or temperature switch. This sophisticated high temperature design is still affordable and an excellent option for demanding OEM applications. Custom high temperature float switches can be built to meet your exact specifications.

Typical Applications

Special designed high temperature float switches are needed when the maximum temperature of your application exceeds 300F. With special high temperature design considerations, a sensor can be used in temperatures up to 500F. These high temperature sensors are typically used in hot oil applications, heated cleaning applications, steam applications, lubrication etc. These sensors are used in high temperature applications to provide high level alarm, low level alarm and process level points. In addition, integrated temperature sensors for optional temperature monitoring is available.

Performance Advantages & A Track Record You Can Trust

At Rochester Sensors, we strive to provide the best combination of low cost, high quality and quick turn manufacturing. Our commitment to providing the highest level of satisfaction will be evident the minute you contact us. Our commitment to quality drives our organization’s structure. Rochester Sensor’s employees take pride and accountability for every float switch or sensor built. Our strict adherence to quality procedures and quality components maximize durability and life of your high temperature float switches.


  • Material: Stainless Steel and Brass
  • Fittings: NPT, SAE, Flanges, Cam and Groove fittings and others
  • Float Material: Stainless Steel or Kynar
  • Stem Length (Tank Depth): Up to 20 feet long
  • Switch Ratings: Up to 100 Watts, 265 Volts and 3 amps (none can be exceeded)
  • Lead Wire: up to 1000 ft. long
  • Operating Temperature range: -40F to +500F (special considerations necessary)
  • Maximum Pressure: up to 300 PSI
  • Life Cycle Expectancy: up to +100 Million cycles

Legendary Service

Industry leader in customer satisfaction & meeting your personal float switch needs!

Industries We Serve

  • Oil/Water Separators
  • Waste Water Treatment Equipment
  • Diesel Fuel /Oil tank and Transfer Systems
  • Fuel Management
  • Chemical Processing and Storage
  • Freon Recovery
  • Lubrication Equipment

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