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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.

Product Description Temperature Accuracy
°F °C
Resistance Temperature Detector (RTD) 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)
Thermistors 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)
ENVIROSEAL™ HD Sensor ENVIROSEAL™ HD Sensor Suited for heavy-duty applications including those in harsh environments. -40 to 392 -40 to 200 Same as RTD and thermistor accuracies above
RT Surface Temperature Surface Temperature Sensors Can be mounted on flat surfaces and is ideal for surface temperature monitoring applications. -58 to 500 -50 to 260 n/a
 

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