The Pyromation Hazardous Location Explosion-Proof Thermocouples are spring-loaded thermocouple assemblies for use in U.S. and Canadian hazardous locations. Engineered with a flame-path element and 316 SS sheath, this assembly simplifies safe temperature measurement in environments with flammable mixtures.
Orders follow a nine-segment code covering agency approval, thermocouple type, sheath diameter, junction type, insertion length, element option, head fitting, head termination, and options. Specify the three-digit “S” dimension in inches. For transmitter options, consult the back of the catalog section.
Example Order Number
XP – J 48 U – 012 – FP – 8HN 71, T-
FM/CSA Approved • Type J • 1/4″ Sheath • Ungrounded • 12″ S Dim • Spring-Loaded/Flame Path • 1/2″ NPT Fitting • Cast Iron/Aluminum Head
| Code | Description |
|---|---|
| XP | FM/CSA explosion-proof approved assembly — CSA File #217989 |
| Single Code | Duplex Code | Type |
|---|---|---|
| E | EE | Type E |
| J | JJ | Type J |
| K | KK | Type K |
| T | TT | Type T |
| Code | Diameter (inches) |
|---|---|
| 48 | 1/4″ |
| Code | Description |
|---|---|
| U | Ungrounded |
| Instructions |
|---|
| Insert three-digit sheath insertion length (“S” Dimension) in inches (e.g., 012 = 12″) |
| Code | Description |
|---|---|
| FP | Spring-loaded element with flame path |
| Code | Description |
|---|---|
| 8HN | 1/2″ NPT flame-path fitting (1-1/2″ “E” length) |
| 8PU4 | 1/2″ NPT union/nipple with flame-path fitting — specify “E” length in inches, max 9″. For lengths >4″, replace “4” with length in inches. |
| Code | Description |
|---|---|
| 71 | Cast iron/aluminum explosion-proof head, Group C |
| 72 | DIN form B aluminum explosion-proof head, Group B |
| 75T-642D | (4 to 20) mA HART® Field Transmitter with aluminum explosion-proof housing, Group B |
| 81 | 316L stainless steel explosion-proof head, Group C |
| 82 | DIN form B 316 stainless steel explosion-proof head, Group B |
| Code | Description |
|---|---|
| SB | 1/2″ NPT conduit reducer bushing |
| I | Stainless steel tag |
| T-441 | (4 to 20) mA isolated head-mounted transmitter — not available with options 71 or 81 |
| T-442 | (4 to 20) mA HART® isolated head-mounted transmitter — not available with options 71 or 81 |
Pyromation Model 70-81 Hazardous Location Explosion-Proof Thermocouples (PDF)
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