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Thermocouple connection heads are available in UL listed, explosion resistant configurations for uses in hazardous locations. Our more
common styles are shown in this catalog. If you are looking for a particular type, which is not shown here, please phone one of our sales
engineers since we have other heads in stock. All thermocouple connection heads are sold with connector blocks. If you would like to order
connection heads without blocks add
WOC
after the part number.
Example:
EXALH08-WOC
The hazardous location classifications of the heads are listed below. They are divided into classes, groups and divisions as listed in the
National Fire Protection Association (NFPA) Codes and Article 505 in the National Electric Code (NEC). Refer to these documents for specific
details.
EXSSH - Explosion Resistant Head - 316 Stainless Steel
Part
Process Conduit Block
Elements
Dimensions
Number
Thread Thread Included
Wires
Figure
NEMA Rating
EXSSHS08
EXSSHS12
EXSSHD08
EXSSHD12
EXSSHT08
EXSSHT12
EXSSHTR08
EXSSHTR12
NPT
1/2”
3/4”
1/2”
3/4”
1/2”
3/4”
1/2”
3/4”
NPT
3/4”
3/4”
3/4”
3/4”
3/4”
3/4”
3/4”
3/4”
AWTS
AWTS
AWTD
AWTD
AWTT
AWTT
AWTR
AWTR
Single / 2
Single / 2
Double / 4
Double / 4
Triple / 6
Triple / 6
RTD / 6
RTD / 6
Height
3 3/16” or 81.0 mm
Width
2 15/16” or 74.6 mm
Cap Diameter
3 1/16” or 77.8 mm
NFPA Hazardous
Area Classification
Class I Group C, D
Class II Group E, F, G
UL Listed
EXSSH
2
Epoxy Coating for Thermocouple Heads
Thermocouple connection heads are available with a white epoxy coating for
increased corrosion resistance. This is common in sanitary applications. Any of our
metal thermocouple connection heads can be provided with this option. To specify the
epoxy coating, add an
E
to the front of connection head part number.
Example #1:
EEXALH12
is a white epoxy coated
EXALHS12
thermocouple
head.
Example #2:
EEXSSHS12
is a white epoxy coated
EXSSHS12
thermocouple
head.
ESH
3
Thermocouple Heads - Explosion Resistant Heads for Hazardous Locations, UL Listed
Page 144
Phone: 617.527.4385 Fax: 617.964.3746 Email:
sales@asrichards.comEXALH - Explosion Resistant Head - Aluminum Body & Cover
Part
Process Conduit Block
Elements
Dimensions
Number
Thread Thread Included
Wires
Figure
NEMA Rating
EXALHS08
EXALHS12
EXALHD08
EXALHD12
EXALHT08
EXALHT12
EXALHTR08
EXALHTR12
NPT
1/2”
3/4”
1/2”
3/4”
1/2”
3/4”
1/2”
3/4”
NPT
3/4”
3/4”
3/4”
3/4”
3/4”
3/4”
3/4”
3/4”
AWTS
AWTS
AWTD
AWTD
AWTT
AWTT
AWTR
AWTR
Single / 2
Single / 2
Double / 4
Double / 4
Triple / 6
Triple / 6
RTD / 6
RTD / 6
Height
3 3/16” or 81.0 mm
Width
2 15/16” or 74.6 mm
Cap Diameter
3 1/16” or 77.8 mm
NFPA Hazardous
Area Classification
Class I Group C, D
Class II Group E, F, G
UL Listed
1
EXALH