Thermocouple Heads

NB, HEPTX and NXT Series

NB, HEPTX and NXT Series:Thermocouple Heads

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•	NB1A - Cast Iron
•	NB2 - Burnished Die Cast Aluminum
•	NEPA & NEPB - Explosion Resistant
•	NSA, NSB & NSC - Cast Iron
•	NBS - Cast Aluminum
•	NEP-T - Cast Iron with Aluminum Cap Exposion Resistant
•	HEP-TX - Feraloy Iron Alloy
View related products - Thermowells and Head and Well Assemblies

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	NB1A	NB1A-0 NB1A-2 NB1A-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
NBS Cast Aluminum	NBS	NBS-0 NBS-2 NBS-4	0 = no terminal block 2 = single element 4 = duplex element max. 8 gage wire	15 18 20	1/2" NPT	1/2" NPT	* Good corrosion resistance * Lightweight * Cover, equipped with safety chain, readily removed without tools * Moisture and dust-resistant
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.

To Order (Specify Model Number)

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Part Number	Availability	Price	Description	RoHS	Qty.
NB1A-0		$23.00	No terminal block, protection tube entry 1/2" NPT, extension wire entry 1/2" NPT		qty.

NB1A-2		$26.00	Single element, protection tube entry 1/2" NPT, extension wire entry 1/2" NPT		qty.

NB1A-4		$28.00	Duplex element, protection tube entry 1/2" NPT, extension wire entry 1/2" NPT		qty.

NB2-0		$23.00	No terminal block, protection tube entry 1/2" NPT standard, extension wire entry 1/2" NPT		qty.

NB2-2		$26.00	Single element, protection tube entry 1/2" NPT standard, extension wire entry 1/2" NPT		qty.

NB2-4		$28.00	Duplex element, protection tube entry 1/2" NPT standard, extension wire entry 1/2" NPT		qty.

NEPA-0	1 Week	$85.00	No terminal block, protection tube entry 3/4" NPT, extension wire entry 3/4" NPT		qty.

NEPA-2	1 Week	$88.00	Single element, protection tube entry 3/4" NPT , extension wire entry 3/4" NPT		qty.

NEPA-4		$91.00	Duplex element, protection tube entry 3/4" NPT, extension wire entry 3/4" NPT		qty.

NEPB-0	1 Week	$85.00	No terminal block, protection tube entry 1/2" NPT, extension wire entry 1/2" NPT		qty.

NEPB-2	1 Week	$88.00	Single element, protection tube entry 1/2" NPT, extension wire entry 1/2" NPT		qty.

NEPB-4	1 Week	$91.00	Duplex element, protection tube entry 1/2" NPT, extension wire entry 1/2" NPT		qty.

NSA-0	1 Week	$50.00	No terminal block, protection tube entry 1/2" NPT, extension wire entry 3/4" NPT		qty.

NSA-2	1 Week	$53.00	Single element, protection tube entry 1/2" NPT, extension wire entry 3/4" NPT		qty.

NSA-4	1 Week	$55.00	Duplex element, protection tube entry 1/2" NPT, extension wire entry 3/4" NPT		qty.

NSB-0	1 Week	$50.00	No terminal block, protection tube entry 3/4" NPT, extension wire entry 3/4" NPT		qty.

NSB-2	1 Week	$53.00	Single element, protection tube entry 3/4" NPT, extension wire entry 3/4" NPT		qty.

NSB-4	1 Week	$55.00	Duplex element, protection tube entry 3/4" NPT, extension wire entry 3/4" NPT		qty.

NSC-0	1 Week	$50.00	No terminal block, protection tube entry 1" NPT, extension wire entry 3/4" NPT		qty.

NSC-2	1 Week	$53.00	Single element, protection tube entry 1" NPT, extension wire entry 3/4" NPT		qty.

NSC-4	1 Week	$55.00	Duplex element, protection tube entry 1" NPT, extension wire entry 3/4" NPT		qty.

NBS-0	1 Week	$30.00	No terminal block, protection tube entry 1/2" NPT, extension wire entry 1/2" NPT		qty.

NBS-2	1 Week	$34.00	Single element, protection tube entry 1/2" NPT, extension wire entry 1/2" NPT		qty.

NBS-4	1 Week	$36.00	Duplex element, protection tube entry 1/2" NPT, extension wire entry 1/2" NPT		qty.

NEP-T0	1 Week	$75.00	No terminal block, protection tube entry 1/2" NPT, extension wire entry 1/2" NPT		qty.

NEP-T2	1 Week	$77.00	Single element, protection tube entry 1/2" NPT, extension wire entry 1/2" NPT		qty.

NEP-T4	1 Week	$79.00	Duplex element, protection tube entry 1/2" NPT, extension wire entry 1/2" NPT		qty.

† All dollar amounts on this site are shown in US currency.

Note: Barrier strips are utilized when more than four connections are required. e.g.: dual element 3-wire RTD. Transmitter may be mounted in most heads. Transmitter may not be mounted in NB4 and only the smallest transmitters can fit the NB2 head by special order. Check transmitter dimensions identified by individual product specifications as well as the internal dimensions for the head.

Keywords:Thermocouple Heads, models NBN, NBS, NBG, NEP-T, NBB, HEPTX and NXT, daq board daq board linear slide system linear slide system