Temperature & Humidity Calibration
Temperature
Littlebrook specialize in the calibration of air temperature measurement instrumentation. Thermometry used with Stack/Emissions pitot static tubes 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”
Littlebrook has a broad range of Accredited Temperature Calibration. Capabilities to meet most types of temperature metrology applications from calibration laboratory probes to general field instrumentation; DTI (Digital Temperature Indicator), temperature probes( Quartz and metal probes) and temperature baths .
| Fixed point Calibrations | |
|---|---|
| Mercury -38.8344°C | ± 0.003°C (3 mK) |
| TP Water 0.01°C | ± 0.002°C (2 mK) |
| MP Gallium 29.7646 °C | ± 0.003°C (3 mK) |
| FP Indium 156.5985 °C | ± 0.004°C (4 mK) |
| FP Tin 231.928°C | ± 0.005°C (5 mK) |
| FP Zinc 419.527 °C | ± 0.006°C (6mK) |
| FP Aluminium 660.323°C | ± 0.020°C (20 mK) |
| The above fixed point calibration accuracies are based on ITS90 Quartz Probes, metal clad probe will have an additional uncertainty. | |
| PRT & Electronic Thermometers and Sensors | |
| -90 °C to -40°C | ± 0.040 °C |
| -40 °C to 0 °C | ± 0.025 °C to 0.021 °C |
| 0 °C to 100 °C | ± 0.019 °C |
| 100 °C to 155 °C | ± 0.019 °C to 0.025 °C |
| 155 °C to 232 °C | ± 0.040°C |
| 232°C to 420 °C | ± 0.060°C |
| 420°C to 650 °C | ± 0.090°C |
| Thermocouples, base metal | |
| -90 °C to 650 °C | ± 0.5 °C |
| CALIBRATION IN AIR CHAMBER | |
| 0 °C to 90 °C | ± (0.33%+ 0.65 °C) |
| CALIBRATION OF ENVIROMENTAL PROBES IN A FLUIDISED POWEDER BATH | |
| 50 °C to 300 °C | ± 0.50 °C |
| 300 °C to 650 °C | ± 1.4 °C |
| Metal block & Liquid Baths | |
| -90 °C to -39 °C | ± 0.040 °C |
| -39 °C to 156 °C | ± 0.030 °C |
| 156 °C to 232 °C | ± 0.040°C |
| 232 °C to 420 °C | ± 0.060°C |
| 420°C to 660 °C | ± 0.090 °C |
| Calibration in Air | |
| 0 °C to 90 °C | ± 0.4 °C to 0.6 °C |
| Calibration in powder bath | |
| 50 °C to 300 °C | ± 0.5 °C |
Humidity
Littlebrook has a range of “fit for purpose” cost effective Accredited humidity standards primarily for the pharmaceutical or clean room sensors customers.
| Relative Humidity Instruments | |
|---|---|
| At a temperature of 23 °C ± 2 °C | |
| 10% rh TO 80%rh in fixed points. | 1.4% rh to 2.3%rh |
For our full UKAS accreditation schedule please click here
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