TH1-K-D4-L12-GRT-GG-12N-AH Industrial thermocouple sensor probe head assemblies type K with 1/2" NPT conduit fitting, 1/2 NPT process SS316 hex nipple to 1/4" O.D. x 12" long sheath and cast aluminum head. Rated up to 270°C.

TH1-K-D4-L12-GRT-MI-12N-AH Type K mineral insulated (MgO) thermocouple with aluminum alloy head. Rated up to 500°C

TH1-K-D4-L12-GRT-MI-12N-CH with cast iron head. Rated up to 900°C

TH1-K-D4-L12-GRT-MI-12N-PH with polypropylene head, rated up to 250°F.

TH1-K-D4-L12-GRT-MI-12N-SH with SS316 head and inconel 600 sheath. Rated up to 900°C

Rated IP68 Head

From$45.00

TH1-K-D4-L12-GRT-MI-12SB- 12SSC2-AH with 1/2" NPT heavy duty compression fitting for fast mounting and level adjustment of probe. 1/2" SS304 bushing welded to tube. Rated up to 500°C

Available in 3/4"x3/4" NPT

TH1-K-D4-L12-GRT-MI-12SB-FL-AH with SS304 adjustable compression flange for fast mounting and level adjustment of probe. Rated up to 500°C

TH1-K-D4-L12-GRT-MI-12SB-FL-AH with cast iron head. Rated up to 900°C

TH2-K-D4-L12-GRT-MI-14N-AHS type K with 3/8" NPT conduit fitting, 1/4 NPT SS304 nipple brazed to 1/4" O.D. SS304 sheath mounted to small cast aluminum head. Mineral insulated elements. Rated up to 500°C

TH3-K-D4-L12-GRT-MI-12SB-12SSC1-AH with 1/2" NPT compression fitting for fast mounting and level adjustment of probe. Rated up to 500°C

Available in 3/4"x3/4" NPT

THR-K-D4-L12-GRT-MI-12SB-AH Reduced tip assemblies. Type K with 3/4" NPT conduit fitting, 1/2 NPT SS304 hex bushing brazed to 1/4" O.D. 5/8" O.D. Stainless Steel 304 tube with 3/4" NPT bushing connected to aluminum head. Rated up to 900°C at tip.

TH4-K-D4-L12-GRT-MI-12N-SX Industrial probe type K with 3/4" NPT conduit, 1/2 NPT Process. SS316 nipple tig weld to 1/4" O.D., SS316 sheath mounted to explosion proof stainless steel head assemblies. Rated up to 900°C.

Available in 3/4"x3/4" NPT

TH5-K-D4-L12-GRT-MI-12N-AH-SL Spring loaded thermocouple probe type K with 1/2" NPT conduit fitting, 1/2 NPT process SS304 Nipple, 1/4" O.D. SS304 sheath mounted to standard size cast aluminum head. Tube travel 3/4", design to use with thermowell or non pressurized applications. Mounting screws not shown on this photo. Rated up to 500°C

MgO, Mineral Insulated ~815°C SS304, SS316

Alloy 600 ~1050°C

Thermocouple Info.

Thermocouples are temperature sensors that measure temperature by generating a small voltage signal proportional to the temperature difference between the junctions of two dissimilar metals. One junction (the hot junction) is typically encased in a metal sheath tube at the point of measurement; the other junction (the cold junction) is connected to the measuring instrument. The measurement instrument measures the voltage signal and the cold junction temperature then computes the temperature.

Precautions and considerations for using thermocouples
Most measurement problems and errors with thermocouples are due to a lack of understanding
of how thermocouples work. Listed below are some of the common problems.

Connection problems: Many measurement errors are caused by unintentional thermocouple
junctions. Remember that any junction of two different metals will cause a junction. If you need
to increase the length of wires from your thermocouple, you must use the correct type of thermocouple
extension wire. Using the wrong wire will introduce a thermocouple junction. Any connectors used must
be made from the correct thermocouple material and correct polarity must be observed.

Lead Resistance: To minimize thermal shunting and improve response time, thermocouples are made
from thinner wire. However, thin wire will cause high resistance which can make it sensitive to
noise and can cause errors due to the input impedance of the measuring instrument. Using twisted
thermocouple wires will help to reduced the noises.

Thermocouple probes and assemblies
When ordering thermocouple probes, Remember that the thicker the sheath or insulated material the
slower the respond time. More details