The AM1730 Secondary Reference PRT provides affordable reference probes for precision temperature measurement and calibration both in the lab and in the field. These PRTs have an accuracy of <0.012°C and a short-term stability of <0.007°C.
To achieve the best stability and repeatability performance, the sensor element is specially designed to protect the platinum sensor wire from high-temperature contamination. A unique support structure and filler material ensure the best balance between hysteresis effect, mechanical shock and thermal shock. This high-quality probe fully complies with ITS-90 criteria for reference thermometers. Each probe comes with a NIST-referenced calibration certificate as standard.
What is a secondary reference PRT?
A secondary reference Platinum Resistance Thermometer (PRT) is a high-quality temperature measurement instrument used for accurate temperature measurements in various applications. Although less accurate than a primary reference PRT, it still offers considerable precision and reliability for many scientific and industrial purposes.
The operating principle of a secondary reference PRT is based on the property that the electrical resistance of platinum changes with temperature. These thermometers use a coil of pure platinum wire, accurately measuring the resistance changes at different temperatures. These measurements are then converted into temperature values using standardised formulae.
Secondary reference PRTs are calibrated against primary reference thermometers. This calibration ensures a high degree of accuracy and reproducibility. They are often used in laboratories, industrial processes, and in meteorological applications where reliable temperature measurements are essential but the extremely high precision of primary reference thermometers is not required.
A key feature of these thermometers is their stability and reliability over a wide temperature range. They are robust and durable, making them suitable for use in demanding environments. In addition, secondary reference PRTs are more cost-effective than their primary counterparts, making them an attractive option for many organisations that need accurate temperature measurements without the cost of a primary reference PRT.
