Standard Platinum Resistance Thermometers (SPRT's)

Complementing it’s range of ceramic wire wound platinum resistance detectors, RTD’s for industrial use, and Calibration facility, SDL also manufacture a range of SPRT’s for use as primary/secondary or industrial semi standard usage.

Primary/Secondary Thermometers.
Model ‘Q25’ thermometers.
The 25.5Ω Model ‘Q’ thermometer is designed for precise temperature measurement as a Primary Standard over the range –200/650ºC in a Calibration Laboratory.
Model ‘Q100’ thermometers.
The Model ‘Q100’ thermometer is designed for precise temperature measurement as a Primary Standard over the range –200/650ºC in a Calibration Laboratory where a value of 100Ω is required.
Model ‘S’ thermometers.
The Model ‘Q’ thermometers is designed for precise temperature measurement as a Secondary Standard, over the range –100/450ºC in a Calibration Laboratory. This is a steel bodied thermometer.

Industrial (Working) Standard Thermometers
SDL offers 2 thermometers for use as working standards. These units are suitable for everyday use for on site calibration work etc.

Model	Temperature range	Stability over range
SV1915	-50/+250ºC	±25mK
SV1929	-70/450ºC	±35mK

If required, any of Thermometers can be supplied with a UKAS Calibration Certificate from SDL’s in house UKAS Laboratory. The Laboratory is accredited to UKAS,(Calibration No. 0171) for the measurement of Resistance Thermometers, Electronic measurement systems, and Temperature transmitters -85°C/650°C.

Additionally its offers Fixed Point Calibrations at:
Triple Point of Water, Ethylene carbonate Point, Freezing point of Tin, Freezing Point of Zinc

The laboratory offers some of the lowest possible measurement uncertainties, down to ±0.6mK, as shown on the attached UKAS Uncertainty schedule

Data Sheets
• Model ‘Q’, to Drawing SX3040
• Model ‘Q100’, to Drawing SX3042
• Model ‘S’, to Drawing SX3041
• SV1915
• SV1929