Thermocouple Heads
To Order (Specify Model No.)
Material
NB1A
Cast Iron
92
(35⁄8)
Type
Cast
NB2
Burnished Die
Cast Aluminum
Iron
NB1A
NB1A-0
NB1A-2
NB1A-4
$23
26
28
MADE IN
USA
86
(33⁄8)
Burnished
Die Cast
Aluminum
NB2-0
NB2-2
NB2-4
23
26
28
NEPA
NEPA-0
NEPA-2
NEPA-4
39
41
43
NEPB
NEPB-0
NEPB-2
NEPB-4
43
45
47
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
NBS-0
NBS-2
NBS-4
25
29
31
NB2
78
(31⁄16)
Cast
Aluminum
Body and
Cap
76
(3)
111
(43⁄8)
76
(3)
89
(31⁄2)
108
(41⁄4)
Cast Iron
92
(35⁄8)
108
(41⁄4)
108
(41⁄4)
NBS
Cast
Aluminum
NBS
Cast Iron
with
Aluminum
Cap
NEP-T NEP-T0
NEP-T2
NEP-T4
Feraloy
Iron Alloy
HEP-TX HEP-TX-2
863 ⁄8)
(3
NSA, NSB, NSC
Cast Iron
108
(41⁄4)
108
(41⁄4)
863 ⁄8 )
(3
NBS Cast
Aluminum
101
(4)
Price
Each
Dimensions Shown in mm (in)
595 ⁄16)
(2
NEPA and NEPB
Explosion Resistant
Model
Number
75
77
79
133
(51⁄4)
HEP-TX-0
HEP-TX-4
HEP-TX-70
89
(31⁄2)
40
43
45
45
117
(45⁄8)
NEP-T Cast Iron with Aluminum
Cap Explosion Resistant
Discount Schedule
1-10 Units . . . . . Net
101 and Up,
11-24 Units . . . . 5%
Consult Sales
25-100 Units . . 10%
102
(4)
B-7
HEP-TX Feraloy® Iron Alloy
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 given
in the Technical Reference Section on our
website at www.omega.com.
MADE IN
USA
OFF THE SHELF FOR FAST DELIVERY!
Wt.
Terminals
(oz)
0 = no terminal block
22
2 = single element
23
4 = duplex element
24
max. 14 gage wire
0 = no terminal block
2 = single element
4 = duplex element
5
6
61⁄2
max. 14 gage wire
0 = no terminal block 161⁄2
2 = single element
173⁄4
4 = duplex element
181⁄4
max. 14 gage wire
Threaded Openings
Protection
Extension
Tube Entry Wire Entry
1
1
⁄2" NPT
⁄2" NPT
1
⁄2" NPT
Standard
⁄4" NPT
3
⁄2" NPT
1
3
1
0 = no terminal block 211⁄2
2 = single element
223⁄4
4 = duplex element
231⁄4
max. 14 gage wire
0 = no terminal block
42
2 = single element
46
4 = duplex element
48
max. 8 gage wire
0 = no terminal block
40
2 = single element
44
4 = duplex element
46
max. 8 gage wire
0 = no terminal block
36
2 = single element
40
4 = duplex element
42
max. 8 gage wire
0 = no terminal block
15
2 = single element
18
4 = duplex element
20
max. 8 gage wire
0 = no terminal block
2 = single element
4 = duplex element
75
76
76
⁄2" NPT
1
w/compression
fitting for 1⁄8" to
1
⁄4" O.D. wire
⁄2" NPT
1
⁄4" NPT
⁄2" NPT
3
⁄4" NPT
1" NPT
3
⁄2" NPT
1
⁄2" NPT
1
⁄4" NPT
⁄2" NPT
⁄2" NPT
max. 14 gage wire
0 = no terminal block
2 = single element
4 = duplex element
70 = for mounting
TX70 Transmitter
62
64
64
1" NPT
66
3
max. 14 gage wire
*Note: The use of
explosion resistant
heads does not imply
that a complete
assembly is either
explosion proof or
intrinsically safe. It is the
user’s responsibility to
determine suitability of
materials for an
installation.
⁄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)
⁄4" NPT
⁄4" NPT
1
• Small and Lightweight
• Good corrosion resistance
• Gasketed, weather resistant
• Burnished finish
• Safety chain on cover
3
3
1
Features
• Rugged construction
• Screw cover with
inside thread
• Moisture and dust resistant
• Ideal for outdoor use
1" NPT
⁄4" NPT
3
• 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)
• Good corrosion resistance
• Lightweight
• Cover, equipped with safety
chain, readily removed
without tools
• Moisture and dust-resistant
SEE OUR COMPLETE SELECTION OF
PROTECTION HEADS!
OMEGA has many more styles
and materials available, plus, a
complete selection of terminal
blocks at www.omega.com.
Terminal Blocks for
Connection Heads
Ceramic Blocks with
Brass Terminals
for Type NBN,
NB3, NBG,
NB1, and NBB
Connection
Heads for Max.
14 Gage Wire
To Order (Specify Model Number)
Model No.* Price Terminals Wt.(oz)
CH-73
$3 2 = single
11⁄4
CH-74
5 4 = duplex
13⁄4
*For NB1 Heads, add suffix “-NB1” to
model number; no additional charge.
Ceramic Fiber Insulated
Thermocouple Elements
for Head & Well Assemblies
Standard 300mm (12")
Long Thermocouple
Elements
Insulation Temperature
Rating Up to
1200°C (2200°F).
Available In Type K,
E and J Calibrations
• 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)
• Explosion resistant head
for 2-wire transmitter
• Rated for: Class I,
Div 1&2, Groups C, D
Class II, Div 1
Groups E, F, G, Class III
• Moisture/dust-resistant
• Utilizes barrier strip
connector (optional)
XC
Series
From
$
16
See Additional Probes
in Section A
To Order (Specify Model Number)
300mm (12") Long with Insulation, Plus 13mm (1⁄2") Stripped Ends Standard
Type K
Price
Price
Type E
Price
Price
Type J
Price Price Add'l
AWG Temp. Range 300mm Add'I Temp. Range 300mm
Add'l
Temp. Range 300mm 150mm
Wire
-184 to
(12") 300mm(6") -184 to
12" 150 mm (6") -300 to
(12")
(6" ) or
Size
1260°C
Length or Fraction
870°C
Length or Fraction
1400°F Length Fraction
14 XC-14-K-12 $17
$3
XC-14-E-12 $17
$3
XC-14-J-12 $17
$3
20 XC-20-K-12
16
2
XC-20-E-12
16
2
XC-20-J-12 16
2
24 XC-24-K-12
16
2
XC-24-E-12
16
2
XC-24-J-12 16
2
B-8
B