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Thermocouple and RTD Protection Heads

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Data Sheet (PDF)

$48.36

Item# NB1-2

Volume discounts available

Volume Discount Schedule

Quantity	Price each
1-9	$48.36
10-24	$45.94
25-99	$43.52
100-499	$41.11
500-999	$38.69
1000+	$36.27

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Lead Time (If not in stock): 20 weeks

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NB1 - Cast Iron
NB2 - Burnished Die Cast Aluminum
NB4 - Miniature Aluminum
NEPA & NEPB - Explosion Resistant

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NB1-2 Model Options

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Edit 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

Specs

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OMEGA offers a wide range of thermocouple heads from cast iron to Feraloy Iron Alloy.

Material	Type	Model No.	Terminals	Wt. (oz)	Threaded Openings		Features
Material	Type	Model No.	Terminals	Wt. (oz)	Protection Tube Entry	Extension Wire Entry	Features
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)
Cast Aluminum Body and Cap	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.

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