Watlow Resistance Temperature Sensors

Watlow manufactures a complete line of resistance temperature sensors that include resistance temperature detectors (RTDs), thermistors and the ENVIROSEAL™ HD temperature sensor for heavy duty applications in harsh environments. Watlow’s platinum resistance elements are specially designed to ensure precise and repeatable temperature measurement. RTDs and thermistors are accurate, sensitive, standardized and interchangeable.

Watlow RTDs

Accurate, repeatable and interchangeable over a wide operating range.

  • -328 to 1200
  • -200 to 650
  • DIN Class A ± 0.06% at 32°F (0°C) DIN Class B ± 0.12% at 32°F (0°C)

Watlow Thermistors

Highly sensitive to small changes in temperature, fairly accurate over a limited temperature range.

  • -75 to 500
  • -60 to 260
  • ± 1% at 77°F (25°C) to ±15% at 32°F (0°C)


Suited for heavy-duty applications including those in harsh environments.

  • -40 to 392
  • -40 to 200
  • Same as RTD and thermistor accuracies above

Watlow Surface Temperature Sensors

Can be mounted on flat surfaces and is ideal for surface temperature monitoring applications.

-58 to 500

-50 to 260

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