Rototherm - Plug Mounted Probes

Plug Mounted Probes
Precision Thermocouples - No Handles
This range of, easy to use, plug-mounted probes (air, surface, penetration and liquid) is mounted directly in to miniature thermocouple plugs. This provides an economical solution to many temperature measuring applications and allows the user the option of one-handed operation.

Order Code

T/C Type

Operating Temperature

Probe Dimensions

Description & Applications

133-161

137-161

132-161

Plug-Mounted Penetration Probes

Ø3.3 x 120mm

Type K

Type T

Type J

-50 to +250°C

Ø3.3 x 120mm

These stainless steel penetration probes are strong and versatile. Suitable for a variety of HVAC applications. Response time less than 3 seconds.

133-301

137-301

132-301

Plug-Mounted Air or Gas Probes

Ø3.3 x 120mm

Type K

Type T

Type J

-50 to +250°C

Ø3.3 x 120mm

These air/gas probes have a perforated tip for fast response and is ideal for a variety of HVAC applications. Response time less than 1 second.

133-045

137-045

132-045

Plug-Mounted Surface Probes

Ø8 x 120mm

Type K

Type T

Type J

-50 to +250°C

Ø8 x 120mm

These stainless steel surface probes are ideal for measuring stationary metallic surfaces. Response time less than 1 second.

133-213

137-213

132-213

MI Liquid Probes

Ø3 x 120mm

Type K

Type T

Type J

-50 to +250°C

Ø3.3 x 120mm

These rigid, stainless steel, MI liquid probes are ideal for measuring liquids or inserting into self-sealing glands. Response time less than 2 seconds.

133-151

137-151

132-151

Fast Response Probes

Ø1.4 stem reducing to Ø0.96 tip x 90mm

Type K

Type T

Type J

-50 to +250°C

Ø1.4 x 90mm

The fast response, penetration probe is designed for measuring the temperature of soft materials and liquids. Response time less than 1 second.

Thermocouple Probes
A thermocouple probe consists of two dissimilar metals or metal alloys that are welded together to form a 'hot junction' measuring sensor. The other end of the thermocouple probe is connected to the measuring instrument, normally via a miniature connector. Within the instrument a second junction is formed electronically, this is normally referred to as the 'cold junction'. When a temperature difference exists between the two ends (Seebeck effect), a voltage is generated which is proportional to the temperature difference. Cold junction compensation techniques are used to correct for instrument variations in ambient temperatures to give meaningful and accurate measurements. Thermocouples of a given type generally produce repeatable results and are therefore interchangeable.

Type K thermocouples are robust and durable and recognised as the most frequently used thermocouple type. Type K thermocouples are ideal for general purpose applications when monitoring over a wide temperature range.

Type T thermocouples are ideal for applications which require a higher accuracy but are only suitable to measure over a limited temperature range.

Type J thermocouples are general purpose thermocouples with a lesser accuracy.

THERMOCOUPLE ACCURACIES/TOLERANCES TABLE

Type

Description/Conductors

Temperature Range

BS EN 60584-2:1993 Class 1 Tolerances

Thermocouple Probe Tolerances

Nickel Chromium/Nickel Aluminium

(Ni-Cr/Ni-Al)

-210°C to +1372°C

±1.5°C -40 to +333°C

±0.4% +333 to +1000°C

±1.5°C -40 to 0°C

±0.5°C 0 to +100°C

±1.5°C +100 to +333°C

±0.4% +333 to +1000°C

Copper/Constantan

(Cu/Con)

-210°C to +400°C

±0.5°C -40 to +125°C

±0.4% +125 to +350°C

±0.5°C -40 to -20°C

±0.2°C -20 to +70°C

±0.5°C +70 to +125°C

±0.4% +375 to +750°C

Iron/Constantan

(Fe/Con)

-180°C to +1200°C

±1.5°C -40 to +375°C

±0.4% +375 to +750°C

±1.5°C -40 to 0°C

±1.0°C 0 to +100°C

±1.5°C +100 to +375°C

±0.4% +375 to +750°C

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