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Thermocouple and RTD Protection Heads
Volume discounts available
Volume Discount Schedule
| Quantity | Price each |
|---|---|
| 1-9 | $55.55 |
| 10-24 | $52.77 |
| 25-99 | $50.00 |
| 100-499 | $47.22 |
| 500-999 | $44.44 |
| 1000+ | $41.66 |
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- NB1 - Cast Iron
- NB2 - Burnished Die Cast Aluminum
- NB4 - Miniature Aluminum
- NEPA & NEPB - Explosion Resistant
NB3-4 Model Options
View all modelsEdit these specs to order a different model. Not all combinations are valid. Options compatible with previous selections will be in bold.
*Highlighted options are not compatible. Please select a different combination.
Material
Process Connection
Terminals
Protection Tube Entry
OMEGA offers a wide range of thermocouple heads from cast iron to Feraloy Iron Alloy. ![]()
Note: NEMA 4X rated Heads Available. Please consult our Technical Quotations Department.
| Material | Type | Model No. | Terminals | Wt. (oz) | Threaded Openings | Features | |
| Protection Tube Entry | Extension Wire Entry | ||||||
| Cast Iron | NB1 | NB1-0 NB1-2 NB1-4 | 0 = no terminal block 2 = single element 4 = duplex element max. 14 gage wire | 22 23 24 | 1/2' NPT | 1/2' NPT | * Rugged construction * Screw cover with inside thread * Moisture and dust resistant * Ideal for outdoor use |
| Burnished Die Cast Aluminum | NB2 | NB2-0 NB2-2 NB2-4 | 0 = no terminal block 2 = single element 4 = duplex element max. 14 gage wire | 5 6 6-1/2 | 1/2' NPT Standard | 1/2' NPT w/compression fitting for 1/8' to 1/4'O.D. wire | * Small and Lightweight * Good corrosion resistance * Gasketed, weather resistant * Burnished finish * Safety chain on cover |
| Cast Aluminum Body and Cap | NEPA | NEPA-0 NEPA-2 NEPA-4 | 0 = no terminal block 2 = single element 4 = duplex element max. 14 gage wire | 16-1/2 17-3/4 18-1/4 | 3/4' NPT | 3/4' NPT | * Explosion resistant head * Rated for: Class III Class I, Group C, D Class II, Groups E, F, G * Screw cover * Moisture and dust resistant * Safety Ideal for outdoor use * Safety Utilizes barrier strip connector (optional) |
| NEPB | NEPB-0 NEPB-2 NEPB-4 | 0 = no terminal block 2 = single element 4 = duplex element max. 14 gage wire | 21-1/2 22-3/4 23-1/4 | 1/2' NPT | 1/2' NPT | ||
| Cast Iron | NSA | NSA-0 NSA-2 NSA-4 | 0 = no terminal block 2 = single element 4 = duplex element max. 8 gage wire | 42 46 48 | 1/2' NPT | 3/4' NPT | * Rugged construction * Screw cover with inside thread * Moisture and dust resistant * Ideal for outdoor use * Standard OMEGA™ heavy duty head * Cover equipped with safety chain (readily removed without tools) |
| NSB | NSB-0 NSB-2 NSB-4 | 0 = no terminal block 2 = single element 4 = duplex element max. 8 gage wire | 40 44 46 | 3/4' NPT | 3/4' NPT | ||
| NSC | NSC-0 NSC-2 NSC-4 | 0 = no terminal block 2 = single element 4 = duplex element max. 8 gage wire | 36 40 42 | 1' NPT | 3/4' NPT | ||
| Cast Iron with Aluminum Cap | NEP-T | NEP-T0 NEP-T2 NEP-T4 | 0 = no terminal block 2 = single element 4 = duplex element max. 14 gage wire | 75 76 76 | 1/2' NPT | 1/2' NPT | * Explosion resistant head * Rated for Class I, Group C, D Class II, Groups E, F, G Class III * Screw cover with inside thread * Moisture and dust resistant * Ideal for outdoor use * Utilizes barrier strip connector (optional) |
| Feraloy with Iron Alloy | HEP-TX | HEP-TX-0 HEP-TX-2 HEP-TX-4 HEP-TX-70 | 0 = no terminal block 2 = single element 4 = duplex element 70 = for mounting TX70 Transmitter max. 14 gage wire | 62 64 64 66 | 1' NPT 3/4' NPT | 1' NPT 3/4' NPT | * Explosion resistant head for 2-wire transmitter * Rated for Class I, Div 1&2, Groups C, D Class III Class II, Div 1 Groups E, F, G, Class III * Moisture and dust resistant * Ideal for outdoor use * Utilizes barrier strip connector (optional) |
Note: NEMA 4X rated Heads Available. Please consult our Technical Quotations Department.
