Rototherm - Precision Fast Response Hand Held Surface Probes

Precision Fast Response Hand Held Surface Probes

Type K Thermocouples
These fast response, ribbon surface probes have been designed to measure the temperature of rotating rollers, moving and flat, non-metallic and metallic surfaces. The measuring parts of these surface probes consist of two flat springs which support the centre measuring thermocouple strip. As standard, this range of hand held probes is supplied with a hexagonal handle, one metre straight PVC lead and miniature connector. Should you require a one metre coiled PVC lead, replace the first digit (1) of the order code with the number 3.

Order Code

T/C Type

Operating Temperature

Probe Dimensions

Description & Applications

123-030

Ribbon Surface Probe

Ø15 x 130mm

Type K

-50 to +250°C

015 x 130mm

This surface probe utilises flat ribbon technology that ensures a fast, accurate response with minimal heat loss, ideal for measuring surface temperatures. Response time less than 0.5 of a second.

123-032

Angled Ribbon Surface Probe

Ø15 x 30 130mm

Type K

-50 to +250°C

015 x 50 x 130mm

This right-angled surface probe utilises flat ribbon technology that ensures a fast, accurate response with minimal heat loss, ideal for measuring surface temperatures. Response time less than 0.5 of a second.

123-036

123-038

Roller Surface Probes

50 x 45mm

Type K

-50 to +250°C

50 x 45mm (PTFE wheels)

50 x 45mm (Stainless steel wheels)

These roller surface probes are designed for measuring moving surfaces and rotating rollers. Available with PTFE or stainless steel wheels. Surface speed should not exceed 100 meters per minute. Response time less than 0.5 of a 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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