0.250″ (6.35mm), 0.188″ (4.77mm), or 0.125″ (3.175mm)  sheath diameter RTD for direct immersion applications. Hazardous ratings are available.

A direct immersion-style RTD that features a 0.50″ NPT process connection and 0.50″ NPT instrument connection. The 0.250″ diameter stem is standard with optional 0.188″ and 0.125″ diameters available. Pressure rated to 3000 psi. Available with ratings for use in hazardous atmospheres. Single element with 3 or 4 wire circuits or dual 3 wire sensing elements.

Series 300 Standard Spec Sheet


Sensor typeRTD (Pt100)
Temperature range-50 to 200 C (-58 to 392 F)
Sensor styleDirect immersion
Sheath diameter0.250", 0.188", 0.125"
Immersion depthFixed
Process connection 1/2" NPT
Head connectionNPT optional
Spring loaded for thermowellNo
Wire terminationHead
Hazardous ratingOptional
Configure Part Application Notes