NB1 / NB2 / NB3 / NB4 / NEPA / NEPB / NSA / NSB / NSC

Thermocouple Heads
NB1 / NB2 / NB3 / NB4 / NEPA / NEPB / NSA / NSB / NSC

NB1 Cast Iron	NB4 Aluminum
NB2 Burnished Die Cast Aluminum	NSA, NSB, NSC, Cast Iron
NB3 Aluminum	NEPA and NEPB Explosion Resistant
Dimensions Shown in mm (in)

To Order (Specify Model No.) Prices Shown in U.S. Dollars

Material	Type	Model No.	Price Ea.
Material	Type	Model No.	Price Ea.
Cast Iron	NB1	NB1-0 NB1-2 NB1-4	$23 $26 $28
Burnished Die Cast Aluminum	NB2	NB2-0 NB2-2 NB2-4	$23 $26 $28
Aluminum	NB3	NB3-0 NB3-2 NB3-4	$25 $28 $30
Aluminum	NB4	NB4-0 NB4-2 NB4-4	$23 $26 $28
Cast Aluminum Body & Cap	NEPA	NEPA-0 NEPA-2 NEPA-4	$39 $41 $43
Cast Aluminum Body & Cap	NEPB	NEPB-0 NEPB-2 NEPB-4	$43 $45 $47
Cast Iron	NSA	NSA-0 NSA-2 NSA-4	$22 $25 $27
	NSB	NSB-0 NSB-2 NSB-4	$22 $25 $27
	NSC	NSC-0 NSC-2 NSC-4	$22 $25 $27

CONTINUED

Model #	Terminals	Wt. (oz)	Threaded Openings		Features
Model #	Terminals	Wt. (oz)	Protection Tube Entry	Extension Wire Entry	Features
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
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
NB3-0 NB3-2 NB3-4	0=no terminal block 2=single element 4=duplex element max. 14 gage wire	8 9 1/4 9 3/4	1/2" NPT	1/2" NPT	• Hinge top
NB4-0 NB4-2 NB4-4	0=no terminal block 2=single element 4=duplex element max. 14 gage wire	2 1/2 3 1/8 3 1/4	M10 X 1	M15 X .75	• Metric • Ultra small size • Good corrosion resistance • Utilizes miniature barrier strip connector (optional)
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 • Ideal for outdoor use • Utilizes barrier strip connector (optional)
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
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 NEWPORT® heavy duty head • Cover equipped with safety chain (readily removed without tools)
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-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

Terminal Blocks for Connection Heads
(Order Separately or included with heads with -2 or -4 suffixes)

To Order with Connectors (price for package of 5)
Ceramic Block with Nickel Plated Brass Terminals for NB2 Head. For Gage 14 Wire Maximum

Model No.	Terminals	Wt. (oz)	Price
CH-49	2 = single	1 1/2	$4
CH-50	4 = duplex	2	$6

Ceramic Blocks with Brass Terminals for Type NSA, NSB, NSC & NBS Connection Heads for Max. 8 Gage Wire

Model No.	Terminals	Wt. (oz)	Price
CH-47	2 = single	3	$6
CH-48	4 = duplex	4 1/2	$8

Ceramic Blocks with Brass Terminals for Type NBN, NB3, NBG, NB1, and NBB Connection Heads for Max. 14 Gage Wire

Model No.	Terminals	Wt. (oz)	Price
CH-73	2 = single	1 1/4	$3
CH-74	4 = duplex	1 3/4	$5

*For NB1 Heads, add suffix “-NB1” to model number; no additional charge.

Model No.	Terminals	Material	Description	Wt. (oz)	Price
CH-83	2	Ceramic	For NB4	1	$4
CH-84	4	Ceramic	For NB4	1	$4
CH-76	2	Bakelite	For NBG, NBN, NB1, NB3	2 1/2	$4
CH-77	3	Bakelite		2 1/2	$4
CH-78	4	Bakelite		2 1/2	$4

†These are alternatives, not standard with -2 or -4 suffixes on thermocouple heads