Thermocouple Heads | McMaster-Carr

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7 Products

Thermocouple and RTD Connection Heads

With Screw-On Cap

With Hinged Cap

Attach these heads to your thermocouple or RTD probe to protect wiring from dust and moisture. The removable cap makes it easy to access your wiring when you need. Install an optional terminal block inside the head to keep your wiring organized.

Hazardous location connection heads are rated for use in Class I, Divisions 1 and 2, Groups A, B, C, and D; Class II, Divisions 1 and 2, Groups E, F, and G; and Class III, Divisions 1 and 2 environments with flammable gases, combustible dust, and combustible fibers.

Probe Connection			Conduit Connection
Pipe Size	Thread Type	Gender	Pipe Size	Thread Type	Gender	Includes	Environment	Environmental Rating		Each
Aluminum
1/2	NPT	Female	3/4	NPT	Female	Screw-On Cap with Retaining Chain	__	__	00000000	000000
1/2	NPT	Female	3/4	NPT	Female	Screw-On Cap with Retaining Chain	Hazardous Location	NEC Class I Divisions 1, 2 Groups A, B, C, D NEC Class II Divisions 1, 2 Groups E, F, G NEC Class III Divisions 1, 2 NEMA 4X	00000000	000000
Cast Iron
1/2	NPT	Female	3/4	NPT	Female	Screw-On Cap with Retaining Chain	__	__	00000000	00000
Plastic
1/2	NPT	Female	3/4	NPT	Female	Hinged Cap	__	__	00000000	00000
1/2	NPT	Female	3/4	NPT	Female	Screw-On Cap with Retaining Chain	__	__	00000000	00000
Stainless Steel
1/2	NPT	Female	3/4	NPT	Female	Screw-On Cap with Retaining Chain	__	__	00000000	000000
1/2	NPT	Female	3/4	NPT	Female	Screw-On Cap with Retaining Chain	Hazardous Location	NEC Class I Divisions 1, 2 Groups A, B, C, D NEC Class II Divisions 1, 2 Groups E, F, G NEC Class III Divisions 1, 2 NEC Zone 1 Groups IIC, IIB, IIA NEC Zone 21 Groups IIIC, IIIB, IIIA IEC Zone 1 Groups IIC, IIB, IIA IEC Zone 21 Groups IIIC, IIIB, IIIA IP66	00000000	000000