Temperature Calibration - UKAS

Temperature Calibration - UKAS

Our UKAS temperature laboratory uses a range of reference platinum resistance thermometers, noble metal thermocouples, stirred liquid baths, isothermal calibration furnaces, climatic chambers and black body sources to provide a comprehensive facility for cost effective thermometer calibration over the range -80°C to 1,200°C.

For more information, give us a call on 01257 244 670 or send an enquiry from our contact page.

Typical items calibrated...

• Thermocouples
• PRTs
• Dial Thermometers
• Data Loggers
• Dry Block Calibrators
• Stirred Liquid Baths
• Infrared Thermometers
• Thermal Imaging Cameras
• Black Body Sources (IR Calibrators)

Typical Manufacturers...

Ametek, Braun, Comark, Cropico, Digitron, Druck, Easylog, Eurotherm, Flir, Fluke, Gemini, Hart, Isotech, Jofra, Land, Omega, Omron, Raytek, Testo, Tinytag

PRT Calibration (Platinum Resistance Thermometer / RTD)

Best uncertainties (for a stable 4 wire PRT)...

±0.012°C at -80°C
±0.003°C at 0.01°C (tpw)
±0.010ºC at 20ºC
±0.015°C at 250°C
±0.032°C at 420°C
±0.055°C at 660°C

These uncertainties are achieveable with stable/repeatable semi-standard platinum resistance thermometers. Industrial 2, 3 and 4 wire PRTs will have a larger uncertainty.

Thermocouple Calibration (Base Metal Types)

Thermometer probes and also thermocouple compensation or thermocouple extension cable, over the relevant range.

Typical UKAS Calibration Uncertainties...

±0.15°C from -80°C to 420°C
±0.20°C from 420°C to 660°C
±1.20°C from 660°C to 1100°C
±2.10°C from 1100°C to 1200°C

The above uncertainties are typically our best for most high quality stable base metal thermocouples. A typical industrial thermocouple will attract a larger uncertainty. Over the -80°C to 250°C temperature range we able able to significantly improve on these uncertainties for thermocouples that have an integral cold junction. The process is however time consuming and quite expensive, and for most applications, unnecessary.

Platinum Thermocouple Calibration

Thermometer probes and also noble metal extension cable or type 'U' thermocouple compensation cable, over the relevant range.

Typical UKAS Calibration Uncertainties...

±0.50°C from 20°C to 660°C
±1.30°C from 660°C to 1100°C
±2.20°C from 1100°C to 1200°C

Again, these are typically our best uncertainties for most high quality stable platinum thermocouples. Typical industrial thermocouples will attract a larger uncertainty. Over the 0°C to 250°C temperature range we can significantly improve on these uncertainties for thermocouples or that have an integral cold junction.

Calibration of Indicating Thermometers

Devices such as an electronic display with an attached probe, or a food safety thermometer with integral display. The devices are calibrated as a system and all thermometer types are covered, including PRT, thermistor or thermocouple.

Dial thermometers and chart recorder type devices are also covered.

Calibration of Dry Block Temperature Calibrators or Calibration Baths

Typical UKAS Temperature Calibration Uncertainties...

±0.035°C from -80°C to 0°C
±0.040°C from 0°C to 150°C
±0.055°C from 150°C to 250°C
±0.075°C from 250°C to 425°C
±0.110°C from 425°C to 660°C
±1.0°C from 660°C to 1100°C
±2.0°C from 1100°C to 1200°C

Infrared Thermometer Calibration

Typical UKAS Infrared Calibration Uncertainties...

±1.7°C from -30°C to -10°C
±1.3°C from -10°C to 15°C
±0.9°C from 15°C to 20°C
±0.6°C from 20°C to 100°C
±0.9°C from 100°C to 200°C
±1.1°C from 200°C to 300°C
±1.4°C from 300°C to 400°C
±1.7°C from 400°C to 500°C

UKAS accredited IR thermometer calibration can currently be undertaken over the above range. The actual uncertainties on your calibration certificate may be larger than these depending on the stability and repeatability of the device under test.

Thermal Imager Calibration (Infrared Thermal Imaging Camera)

Thermal imaging cameras that are able to display a measured radiant temperature should be calibrated. Our temperature ranges and uncertainties for UKAS thermal imager calibration will be similar to those quoted for an infrared thermometer calibration.

Calibration of Black Body Sources (Infrared Calibrators)

In addition to calibrating IR thermometers and thermal imaging cameras we are able to offer a Radiometric UKAS calibration of IR Calibrators E.g.

Fluke 9132 / 9133

Fluke 4181 / 4180

IR-350 / IR-500

BX-350 / BX-500

Our temperature ranges and uncertainties for UKAS calibration will be similar to those quoted above. 

Calibration of Digital Thermometer Readouts

We are able to offer stand alone calibration of both hand held and bench type digital thermometer readouts without a temperature probe. 

E.g. Cropico 3000, Fluke 1529 "Chub E4", Isotech "milli K".

As these instruments are essentially an electrical instrument they are calibrated in our UKAS electrical laboratory.

For more information, give us a call on 01257 244 670 or send an enquiry from our contact page.