34 / 204
* add the required thermocouple length (*) as the suffix. 12”, 18” 21”, 24”, and 36” are considered stock items. Alloy #9 is standard,
other alloys are available - see pages 88 & 90. For Dual thermocouples add a “D” to the part number: Example: 20KD4M
Application
Wire
Gauge
O.D.
Inches
O.D.
mm
Part Number
Type K
1
16
20
20
24
1/4”
1/4”
3/16”
1/8”
6.4
6.4
4.8
3.3
16K4M-9M4-K1-*
20K4M-9M4-K1-*
20K4M-9M3-K1-*
24K4M-9M2-K1-*
Miniature, Plugs and Jacks
Miniature Thermocouple Assemblies have a maximum service temperature of
1300°F (700°C) depending on the type and gauge of thermocouple wire used. They
have limited use at high temperatures due to the types of insulation used in their
construction. Miniature thermocouples are more flexible than MgO (swaged) types.
1/8”, 3/16” and 1/4” O.D. tube assemblies are made with silicon impregnated fiber-
glass insulated elements. Standard assemblies are supplied with a floating junction
and solid round pin male plug and female jack. Since the junction is floating, the tube
or element can easily be replaced. Grounded junctions can, however, if required, are
available. Insert “
-U
” after the “
4M
” in the part number.
Optional 1/8” NPT stainless steel compression fitting can be attached by adding a
“
CF
to the end of the part number. An 1/8” NPT fitting is standard on 1/8” and 3/16”
O.D. tubes. A 1/4” NPT compression fitting is standard on all 1/4” O.D. tubes.
2
16
20
20
24
1/4”
1/4”
3/16”
1/8”
6.4
6.4
4.8
3.3
16K4M-9M4-K2-*
20K4M-9M4-K2-*
20K4M-9M3-K2-*
24K4M-9M2-K2-*
3
16
20
20
24
1/4”
1/4”
3/16”
1/8”
6.4
6.4
4.8
3.3
16K4M-9M4-K3-*
20K4M-9M4-K3-*
20K4M-9M3-K3-*
24K4M-9M2-K3-*
4
Subminiature, Plugs and Jacks
Subminiature Thermocouple Assemblies have a maximum service temperature of
400°F (204°C) depending on the type and gauge of thermocouple wire used. They
have limited use at high temperatures due to the types of insulation used in their
construction. Subminiature thermocouples are more flexible than MgO (swaged)
types. The 1/16” diameter thermocouple assemblies are made with a Kapton® insu-
lated thermocouple wire. Standard assemblies are supplied with a floating junction
and a flat pin male plug and female jack. Since the junction is floating, the tube or
element can easily be replaced. Grounded junctions can, however, if required, are
available. Insert “
-U
” after the “
4M
” in the part number.
Optional 1/8” NPT stainless steel compression fitting can be attached by adding a
“
CF
to the end of the part number.
30
1/16”
1.6
30K4M-9M4-KM1-*
5
30
1/16”
1.6
30K4M-9M4-KM2-*
6
30
1/16”
1.6
30K4M-9M4-KM3-*
9
Flexible Extensions
Armored cable may be used as a Flexible Extension on miniature tubes.
State miniature assembly by using the length of immersion “U” plus “
FE
” and the
length of the flexible extension (in at least two digits).
Example: 20K4M-9M3-K3-12-FE06
(12” protection tube and 6” of Flexible Extension)
10
Armored Cable
Armored cable may be used as a flexible protection on leads attached to Jacks (or
Plugs). State miniature assembly plus “
AC
” and the length of the extension (in at least
Example: 20K4M-9M3-K3-18-AC36
Specifies a Type K Miniature thermocouple
assembly, Plug and Jack and 36” Armored
covered lead.
7
Pointed Probes
A pointed probe is used to penetrate a soft material such as food products. When
used with food products the probe should be made of 316 stainless steel.
Add: “
PN
” to the part number.
Example: 20K4M-16M3-PN-K1-06
Specifies a Type K Miniature thermocouple
assembly, 6” pointed probe, and plug.
8
Ceramic Insulator, Collar, and Plug
A pointed probe is used to penetrate a soft material such as food products. When
used with food products the probe should be made of 316 stainless steel.
Add: “
PN
” to the part number.
Example: 24R8C-RS1-12
Specifies a Type R thermocouple element in a
3/16” O.D. Alumina insulator, collar, plug and
18” length.
Page 34
Phone: 617.527.4385 Fax: 617.964.3746 Email:
sales@asrichards.comThermocouples - Miniature and Subminiature Assemblies - Plugs and Jacks