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Do you need help? Go to see our FAQ section. To learn about thermometers and temperature measurement in more depth visit the ETI Learning Centre.

thermometer probe guide

thermometer probe guide & information

Thermometers are only part of the system; of equal importance is the design of the temperature probes used to physically measure the item. ETI manufactures an extensive range of type K or T thermocouple probes, PT100 (RTD) probes and thermistor probes to compliment our range of portable, hand held thermometers and data-loggers. Download our probe selection guide here

response times

 The response time is the time taken for the sensor to reach 66.6 % of the final reading and is the industry standard means of measuring probe response times. Five times the quoted response time is the figure normally required to obtain 100 % of the reading. Response times are dependent upon the substance being measured and, in the case of liquid or gas, upon the degree of agitation. It is therefore difficult to quote an accurate response time without knowledge of the application.

The results given in this catalogue were obtained in a stirred oil bath and may differ from those obtained under other conditions but can be used as a general guide when selecting probes.

handle types
As standard and where appropriate, each probe is supplied with either a hexagonal, T-shaped or ribbed heavy duty handle.


handle1Hexagonal handle is manufactured from Triax (ABS/nylon blend) and available in black. Maximum temperature is 105 °C.


handle 2T-shaped handle is manufactured from polypropylene and available in black or white. Maximum temperature is 85 °C.


handle 3Ribbed heavy duty handle (with colour coded caps) is manufactured from polypropylene and available in black or white. Maximum temperature is 85 °C.

 

Biomaster - both the hexagonal and ribbed handles contain Biomaster anti-bacterial additive, as standard.

lead types
PVC straight lead is a general purpose lead and available in lengths up to 100 metres. As standard and where appropriate, each probe is supplied with a one metre straight PVC lead and a connector. As an alternative, a one metre coiled PU lead is available for the standard, hand held, type K or T thermocouple probes, replace the first digit (1) of the order code with the number 3. Maximum temperature for both PVC and PU is 100 °C.

applications
Applications quoted are typical for the specific probe, although there are many alternative uses for which the probe could be equally suitable. For advice on a specific probe for a particular application, please contact the ETI technical sales team. Where requirements cannot be met from the existing standard range of probes, alternative designs can be manufactured. 

Probe Specification - K Thermocouple Probes

Thermocouple Probes The majority of ETI manufactured Thermocouple probes are from Type “K” Thermocouple wire. The specification of Class 1 Type “K” Thermocouple Wire is detailed in British Standard BS EN 60584-1:2013, as follows:

±1.5 °C between -40 & +333 °C

±0.4 % between +333 & 1000 °C

ETI probes are manufactured from Thermocouple wire which is chosen for improved performance and is specified as follows:

±0.5 °C between 0 & 100 °C 

However, certain probes do not include the selected wire and are therefore specified to be accurate to the BS EN 60584-1:2013 specifications, as above. These probes include most industrial probes including:

123-000 Surface Probes

123-020/8 Heavy Duty Surface Probes

123-204/212 High Temperature Probes

133-040 Pipe Clamp Probes

133-080 Velcro Pipe Probes

133-213 MI Liquid Probes

133-382/383 Fiberglass Wire Probes

Probe Specification - T Thermocouple Probes

For Type "T" Thermocouple Probes the specification of Class 1 Type “T” Thermocouple Wire is detailed in British Standard BS EN 60584-1:2013, as follows:

±.0.5°C between -40 & 100°C
±0.4% between -100 & 400°C

ETI probes are manufactured from Thermocouple wire which is chosen for improved performance and the following Type T probes, 127-160, 327-160, 127-159, 327-159, 127-300 & 327-300, are specified as follows:

±0.2°C between -20 to & 70°C

For other Thermocouple Types and detailed specification please contact ETI Technical Sales for information on specification. 

Thermistor Probes

The Tolerance Specification for all ETI manufactured Thermistor Probes is as follows:

±0.4 °C between -20 & -10 °C

±0.3 °C between -10 & 0 °C

±0.2 °C between 0 & 70 °C

±0.4 °C between 70 & 100 °C

Platinum Resistance Probes

The Tolerance Specification for all ETI manufactured standard PT100 Probes is as follows: (±0.15 °C ±0.2 %) between -200 & 600 °C.

For all probes not listed here, please contact Technical Sales for further information. 01903 202 151 or sales@etiltd.co.uk.

Download our thermometer probe selection guide.