25VS Gas Sensor

25VS Gas Sensor


Technology: Sensing

Product Category: Gas Sensors

Application: Water Heating

Brand: Therm-O-Disc


The 25VS flammable vapor sensor is a silicone-based sensor that detects vapors released during a typical gasoline spill. The 25VS requires no power to operate and offers long life and good sensitivity to most gasoline components within a wide temperature operating range.

  • Operating Environment:
  • Operating Temperature:
  • Thermal Response (Sec.):
  • Humid, Power Vent Water Heater
  • 0°C to 65°C (32°F to 149°F)
  • Gasoline Vapor
  • No external power source needed
  • Enables control module to prevent ignition of vapors inside and outside of water heater
  • Meets Flammable Vapor Ignition Resistance (FVIR) requirements of ANSI Z21.94/CSA 6.31 standard
  • Detects vapors in less than a minute after spill

Agency Ratings

(consult catalog for details)

  • Catalog
    Vapor Sensor Catalog
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  • DO NOT DELETE OR UNPUBLISH - Test Resource
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66T Manual Reset Bi-metal Limit

66T Manual Reset Bi-metal Limit


Technology: Safety limits and Controls

Product Category: Bi-metal

Application: Water Heating

Brand: Therm-O-Disc


The 66T manual reset temperature limit from Therm–O–Disc® offers proven reliability in a compact, versatile, cost-effective design. The bi-metal disc’s snap-action provides high-speed contact separation resulting in excellent life cycle characteristics at electrical loads up to 40 amps at 277 VAC.

  • Function:
  • Max Calibration:
  • Max Electrical Amperage:
  • Manual Reset
  • 113°C / 235°F
  • 40
  • Double pole, single throw (”M2 Trip Free” construction)
  • Can be mounted in combination with cycling 59T
  • 66TM available with surface mount tabs (when not used in out 59T)
  • 10–32 tin plated terminal screws for electrical connections
  • Welded construction used on all internal current carrying components for greater electrical integrity

Agency Ratings

(consult catalog for details)

  • Catalog
    59T, 66T Water Heater Controls Product Specifications
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  • DO NOT DELETE OR UNPUBLISH - Test Resource
    Read More

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59T Adjustable Bi-metal Control

59T Adjustable Bi-metal Control


Technology: Safety limits and Controls

Product Category: Bi-metal

Application: Water Heating

Brand: Therm-O-Disc


The 59T series of adjustable, automatic reset thermostats is designed to meet the high electrical capacity requirements of electric water heaters. Its design uses a snap-action, temperature sensitive bi-metal disc to provide long, dependable control life at electric loads up to 30 amps at 250VAC. The 59T can be supplied in combination with our 66T manual reset limit as an industry standard electric water heater temperature control/limit.

  • Function:
  • Max Calibration:
  • Max Electrical Amperage:
  • Adjustable Auto Reset
  • 93°C / 200°F
  • 30
  • 10–32 tin plated terminal screws for electrical connections
  • 60°F adjustable range
  • Single pole, single throw or single pole, double throw, open on temperature rise construction
  • Welded construction used on all internal current carrying components for greater electrical integrity

Agency Ratings

(consult catalog for details)

  • Catalog
    59T, 66T Water Heater Controls Product Specifications
    Read More
  • DO NOT DELETE OR UNPUBLISH - Test Resource
    Read More

Find a Distributor

Sensience's trusted distributors provide access throughout the world to our selection of the highest quality products and services.