Precision Calculators for Temperature Calibration

Four practical, browser-based tools for calibration laboratories, covering SPRTs to ITS-90, thermistors, platinum resistance thermometers to IEC 60751, and thermocouples to IEC 60584. Calculate, convert and verify results quickly, with no software to install.

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Choose a Temperature Calculator

Browser-based calculators

No installation, data stored locally

Select the calculator that matches your sensor type and calibration task. Each tool runs directly in your browser and is designed to support common laboratory calculations, conversions and coefficient work.

Your data remains stored only in your browser and is not uploaded to our servers. You can export your results at any time. Clearing your browser data, including site data or local storage, will remove all saved calculator information.

PRT / RTD Calculator: IEC 60751: Callendar–Van Dusen

Industrial platinum thermometers to IEC 60751: fit R₀/A/B coefficients, plus C for sub-zero data, from calibration points. Use the IEC 60751 nominal curve and convert between resistance and temperature.

PRT – RTD Calculator

Why Choose Isotech Products and Services?

With more than 45 years of experience in temperature calibration, Isotech supports customers from industrial applications through to primary and secondary laboratories. Our products and services are built around practical metrology, proven performance and long-term technical support.

By choosing Isotech, you benefit from:

A broad range of temperature calibration equipment for PRTs, SPRTs, thermocouples, thermistors, infrared thermometers and industrial sensors
Products developed by specialists who understand calibration uncertainty, traceability and real laboratory requirements
UKAS-accredited calibration services for equipment, sensors and temperature standards
Training, technical guidance and application support before and after purchase
Equipment designed for dependable use, straightforward operation and long service life

Whether you need a portable calibrator, precision thermometer, laboratory system, fixed-point standard or calibration service, Isotech can help you select a solution suited to your application and required uncertainty.

We are satisfactorily using Isotech, UK Model milliK since 2016. We are very much satisfied with the performance of the equipment and the same has fulfilled out thermal calibration requirements. The milliK offers a high degree of stability required for faithful calibration of Temperature Sensors.

We congratulate Isotech for developing such world class products.

Bharat Dynamics Limited

milliK Precision Thermometer

The milliK Precision Thermometer is the ideal tool for laboratories needing to calibrate temperature sensors precisely and consistently. It can measure and calibrate devices over a temperature range from -270°C to 1820°C, and can be expanded to become a measuring system with up to 33 channels.

The milliK can be used to calibrate a wide range of temperature sensors, including SPRTs, RTDs, Thermistors, and Thermocouples. It is also expandable, making it ideal for pharmaceutical companies with a variety of storage devices.

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TTI-10 Handheld Thermometers

The TTI-10 Handheld Thermometer is a device that helps companies make precision measurements. It is the perfect readout for our Semi Standard PRTs, over the temperature range -50 to 200 °C we provide UKAS ISO 17025 calibration with an uncertainty of just 0.025C – that is for the complete system PRT and TTI-10 combined.

The thermometer can log up to 4000 measurements and transfer data to a computer for analysis, which helps improve product quality and meet regulatory requirements. The instrument has two input channels, is easily transported and with an industry leading battery life – typically 20 hours of operation.

The TTI’s portable design makes it perfect for on-site use. This thermometer is a great solution for anyone needing a portable, accurate, easy-to-use temperature calibrator.

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