Richards Thermocouple and Temperature Sensor Catalog 16

47 / 204

Melt Bolt Thermocouples are used to measure plastic melt temperatures as the material moves down the barrels in extruders and
injection molding equipment. The Special Limits of Error element and heavy duty bolt are both constructed from 304 stainless steel. The Element
is a MgO type with A grounded junction is standard for a rapid temperature response time. The extension and 3/16” diameter 304 stainless steel
tip lengths can be specified for your application. Melt Bolts can be with 1/2” - 20 N.F. thread lengths of 3”, 4”, 6”, and 9”. Plugs connectors, if
used, are made with solid pins.
! If you would like to order a Type E, J, N, or Type T assembly, just substitute ”K” in the catalog number with an E, J, N, or T.
Example: MBTJ-3-5-1-J1 (Type J, Melt Bolt thermocouple, 3” long bolt, 5” extension, 1” tip, a male plug).
Application
Wire
Gauge
Type
K Type K
Bolt
Lengths
(X)
1
Melt Bolt Thermocouples (MBT)
Bolt Thermocouples are machined from solid 304 stainless steel bar
stock for corrosion resistance. The elements are constructed with MgO
insulation for maximum temperature resistance. The tips are 3/16” in
diameter and also made from 304 stainless steel. All melt bolts have a
1/2 - 20 N.F. thread for ease of installation. The extension portion of the
thermocouple can be bent to suit your application.
K1 is the catalog number for a K plug.
20 K
3”
4”
6”
9”
MBTK-3-E-Y-K1
MBTK-4-E-Y-K1
MBTK-6-E-Y-K1
MBTK-9-E-Y-K1
E
Y K1 plug X
Spring Adjustable Bayonet immersion type thermocouples give you the flexibility to adjust to a variety of well depths from 1” to 7” by
use of an 8” adjustable spring. The bayonet adapter allows the thermocouple to be quickly disconnected from the process. This type of
thermocouple is frequently used in the plastic Industry. A 304 Stainless Steel overbraid is for abrasion resistance on the impregnated
fiberglass insulated 20 gauge stranded wire. The tips are 3/16” diameter made with 304 Stainless Steel. A grounded junction is standard to
help prevent element from pulling out of the tube and to provide a rapid response time.
! If you would like to order a Type E, J, N, or Type T assembly, just substitute the ”K” in the catalog number on this page with an E, J, N, or T.
Example: SABJ-OB8-J1-24 (Type J, thermocouple, a male plug and 24” long.)
Application
Wire
Gauge Type Type K Style
1
Spring Adjustable Bayonet Thermocouples (SAB)
Spring Adjustable Bayonet Thermocouples have a maximum service
temperature of 900°F (482°C) due to the rating on the fiberglass inner
insulation. The elements have impregnated fiberglass insulated wire with a
304 stainless steel overbraid. The tips are 3/16” in diameter and are made
from 316 stainless steel.
20 K
Plain
Plug Only
Plug & Jack
SABK-OB8-*
SABK-OB8-K1-*
SABK-OB8-K3-*
*
Plastic Industry Thermocouples - Melt Bolt and Spring Adjustable Bayonet
Manufacturing, Engineering and Sales Since 1938
Phone: 617.527.4385 Fax: 617.964.3746 Email:
Page 47 Visit our website at
TS2S
MB & SAB