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.

Available in 3/4"x3/4" NPT

$CAD

$45

Reg.

$65

$45

TH1-K-D4-L12-GRT-GG-12N- 12SSC2-AH with 1/2" NPT heavy duty compression fitting for fast mounting and level adjustment of probe. 1/2" SS316 bushing welded to tube.

Available in 3/4"x3/4" NPT

$60

Reg.

$99

$60

TH1-K-D4-L12-GRT-GG-12N-12SSC1-AH with 1/2" NPT compression fitting for fast mounting and level adjustment of probe.

Available in 3/4"x3/4" NPT

$60

Reg.

$99

$60

Reg.

$75

$45

Reg.

$160

$95

TH2-K-D4-L12-GRT-GG-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.

Reg.

$58

$45

Reg.

$85

$48

THR-J-D4-L12-GRT-GG-12SB-AH Reduced tip assemblies. Type J 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.

Reg. $ 195.00 $120.00

TH4-K-D4-L12-GRT-GG-12N-SX Industrial probe type K with 3/4" NPT conduit, 1/2 NPT Process. SS316 Nipple brazed to 1/4" O.D. SS316 sheath mounted to explosion proof stainless steel head assemblies.

Available in 3/4"x3/4" NPT

$150

Reg.

$195

$150

TH5-K-D4-L12-GRT-GG-12N-AH-SL Spring loaded thermocouple probe type K with 1/2" NPT conduit fitting, 1/2 NPT process SS316 Nipple, 1/4" O.D. SS316 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.

Available in 3/4"x3/4" NPT Reg.$95.00 $60.00

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 sensor probe 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 intrument. 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