Temperature & Humidity Calibrations

Why use an ISO/EN 17025 Accredited Calibration Facility?

Littlebrook specialize in the calibration of air temperature measurement instrumentation . Thermometry used with Stack/Emissions pitot static tubes ideally should ideally be calibrated as close as possible to their conditions of use.

Littlebrook have developed Accredited Temperature Calibration Procedures using over fluidized power baths to simulated temperatures in a “Dirty Stack”.


Measured Quantity Instrument or Gauge	Range	Best Measurement Capability Expressed as an Expanded Uncertainty (k=2)
TEMPERATURE
Triple point of Mercury Triple point of water Melting point of Gallium Freezing point of Indium Freezing point of Tin Freezing point of Zinc	-38.8344 °C 0.01 °C 29.7646 °C 156.5985 °C 231.928 °C 419.527 °C	0.003 °C 0.002 °C 0.003 °C 0.004 °C 0.005 °C 0.006 °C
Calibration in Air Chamber	0 °C to 90 °C	0.4 °C to 0.6 °C
Calibration in fluidised powder bath	50 °C to 300 °C	0.5 °C
Platinum Resistance Thermometers and Electronic Thermometers with sensors	-90 °C to -40 °C -40 °C to 0 °C 0 °C to 100 °C 100 °C to 155 °C 155 °C to 320 °C 320 °C to 650 °C	0.05 °C 0.025 to 0.021 °C 0.019 °C 0.019 to 0.025 °C 0.09 °C 0.14 °C
Thermocouples, base metal	-90 °C to 650 °C	0.5 °C
Metal block calibrators	-90 °C to 155 °C 155 °C to 320 °C 320 °C to 650 °C	0.06 °C 0.10 °C 0.14 °C
HUMIDITY
Relative Humidity Instruments	10 % rh 35 % rh 50 % rh 65 % rh 75.3 % rh 80 % rh	1.4 % rh 1.9 % rh 2.0 % rh 2.2 % rh 2.2 % rh 2.3 % rh
For full Accreditation details see www.ukas.org