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ACH

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Thermocouple Heads - Aluminum

The NEMA enclosure performance ratings for each of our heads are listed to help you select the proper head for your application. The most common NEMA Ratings for thermocouple connection heads in our catalog are the NEMA Type 2, 4, and Type 4X. Their definitions from the National Electrical Manufacturers Association Classification detailed in NEMA 250-1997 are shown below. √ NEMA 2: For indoor use to provide personnel protection against incidental contact with the enclosed equipment and provide protection against from falling dirt, dripping or light splashing water. √ NEMA 4: For indoor or outdoor use to provide protection from falling dirt, rain, sleet, snow, windblown dust, splashing water, hose directed water, and will be undamaged by the formation of ice on the external surface of the head. √ NEMA 4X: For indoor or outdoor use to provide protection from falling dirt, rain, sleet, snow, windblown dust, splashing water, hose directed water, corrosion , and will be undamaged by the formation of ice on the external surface of the head.

SH - Standard Head - Screw Cap & Chain - Aluminum

Part

Process

Conduit

Block

Elements/

Dimensions/ NEMA Rating

Number

Thread

Thread Included

Wires

Figure

NPT 1/8” 1/2” 3/4” 1/8” 1/2” 3/4” 1/8” 1/2” 3/4” 1/8” 1/2” 3/4”

NPT 3/4” 3/4” 3/4” 3/4” 3/4” 3/4” 3/4” 3/4” 3/4” 3/4” 3/4” 3/4”

1

SHS02 SHS08 SHS12 SHD02 SHD08 SHD12 SHT02 SHT08 SHT12 SHTR02 SHTR08 SHTR12

AWTS AWTS AWTS AWTD AWTD AWTD AWTT AWTT AWTT AWTR AWTR AWTR

Single / 2 Single / 2 Single / 2 Double / 4 Double / 4 Double / 4 Triple / 6 Triple / 6 Triple / 6

Height 3.6” or 91.4 mm

Width 3.6” or 91.4 mm

Cap Diameter 3.1” or 78.7 mm

NEMA Rating - Type 4

RTD / 6 RTD / 6 RTD / 6

For 1” NPT Process Threads use AWH Heads: AWHS16, AWHD16, AWHT16 AND AWHTR16 and Connector Blocks: AWTS, AWTD, AWTT and AWTR, respectively.

SH

AFTH - Aluminum Flip-Top Head Part Process Conduit Block

Elements/

Dimensions/

Number

Thread

Thread Included

Wires

NEMA Rating

Figure

2

NPT 1/8” 1/2” 3/4” 1/8” 1/2” 3/4” 1/8” 1/2” 3/4” 1/8” 1/2” 3/4”

NPT 3/4” 3/4” 3/4” 3/4” 3/4” 3/4” 3/4” 3/4” 3/4” 3/4” 3/4” 3/4”

AFTHS02 AFTHS08 AFTHS12 AFTHD02 AFTHD08 AFTHD12 AFTHT02 AFTHT08 AFTHT12 AFTHTR02 AFTHTR08 AFTHTR12

AWTS AWTS AWTS AWTD AWTD AWTD AWTT AWTT AWTT AWTR AWTR AWTR

Single / 2 Single / 2 Single / 2 Double / 4 Double / 4 Double / 4 Triple / 6 Triple / 6 Triple / 6

Height 3.4” or 86.4 mm

Width 3.1” or 78.7 mm

Cap Diameter 3.3” or 83.8 mm

NEMA Rating - Type 4

RTD / 6 RTD / 6 RTD / 6

AFTH

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