What is CoolTip™ temperature measurement technology?
Depending on the application, the current through a temperature sensor is generally selected as a compromise between the conflicting requirements of high sensitivity and low self-heating effects, to achieve the best overall accuracy. This is particularly the case for platinum resistor sensors. However, RTL's innovative electronic circuitry allows both a high sensitivity and minimal self-heating effect, to improve the overall accuracy of the temperature measurement. The lower power dissipation in the temperature sensor (hence CoolTip™) also helps to maintain the accuracy and stability of the temperature calibration over long time periods.
What are the applications?
The technology was primarily developed for the P22 Pump Monitor, which has a differential temperature specification for cold water applications of better than 1 mK accuracy over a period of a year, for the temperature range 0 to 50 °C. Long term tests have shown that any variation in temperature calibration is typically less than 0.3 mK (the experimental uncertainty) over 4 years.
The P22 only requires the absolute temperature to be measured with an accuracy of 100mK, but the stability is such that probes can be calibrated for absolute temperature by accredited laboratories to within specified uncertainties of, for example, 1 to 5 mK.
Other applications where temperature and/or differential temperature must be accurately known include oceanography. Enquiries are invited for custom designs.
Probes are available for the measurement of temperature up to 270°C, although tests on their long-term stability at temperatures above 70 °C are on-going.