SPONSORED FEATURE Cover story W
hen it comes to successful temperature calibration, precision and reliability are paramount. As industries evolve, the demand for accurate and efficient
temperature calibration solutions intensifies, underscoring the critical role of selecting the appropriate equipment. This editorial explores the various types of temperature calibration equipment, emphasising the importance of making informed decisions tailored to specific calibration needs. A valuable truism is that a thermometer measures its own temperature, not what you want or hope it will measure.
A CHOICE OF SOLUTIONS With temperature calibration, there are many choices, and there is no single best solution. It is about selecting the right equipment to suit the application. Many sensors can be calibrated successfully in traditional dry-well calibrators, while others may need the use of a sophisticated liquid bath, or for high temperatures, a furnace. One question to ask is, “Can I be confident the thermometers or sensors will reach the same temperature as the calibration equipment?” Factors such as the sensor size and required immersion depth influence the type of equipment needed.
DRY-BLOCK CALIBRATORS Renowned for their versatility and ease of use, dry block calibrators are widely used from low temperatures up to 1,200°C. These devices provide a reliable and straightforward method for calibrating temperature sensors by offering a stable temperature environment. Their portability makes them ideal for on-site temperature calibration. Devices like the Fast-Cal range of calibrators are designed for rapid, portable calibration across a wide temperature range. These tools are indispensable for on-site calibrations, providing both speed and accuracy to meet industrial demands.
MASTERING TEMPERATURE
CALIBRATION: A GUIDE TO SELECTING THE IDEAL EQUIPMENT
greater immersion depth than dry blocks, providing a flexible solution for laboratories handling diverse calibration tasks. Stirred liquid baths can have improved homogeneity over dry blocks and offer lower calibration uncertainty. Stirred oil baths can be used from -80°C or lower to a maximum of around 300°C.
efficiency, and reliability of the calibration process. Factors such as the required temperature range, immersion depth, the types of sensors being calibrated, and the specific application demands must be carefully considered. For instance, high- precision laboratories working with standard platinum resistance thermometers (SPRTs) might opt for microK precision thermometry bridges due to their exceptional accuracy and stability. Conversely, industrial settings requiring rapid on- site calibration will benefit more from fast response rugged equipment.
ACCURATE MEASURING INSTRUMENTS In addition to heat sources, readouts are needed to display the value of both reference thermometers and the devices under test. Our bench thermometers and laboratory bridges handle a wide range of sensor types, can be expanded for multi-channel operation. Our milliK thermometer has a best accuracy of 0.003°C, and our bridges to 0.00003°C.
CONCLUSION
Multi-function Temperature Calibrators like the Isocal-6 range can be used both as dry block calibrators and as portable liquid baths, and in addition to sensors including PRTs and thermocouples can also calibrate surface sensors and infrared thermometers.
LIQUID BATHS
Liquid baths offer unparalleled temperature stability and uniformity, critical for applications requiring the highest calibration precision. These systems can accommodate a wide range of sensor types with
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THE IMPORTANCE OF PRECISION Choosing the appropriate temperature calibration equipment is not merely a matter of preference but a critical decision that impacts the accuracy,
Selecting the ideal temperature calibration equipment is a critical decision that can significantly impact the accuracy, efficiency, and reliability of the calibration process. With our extensive experience spanning over 40 years in designing and manufacturing temperature calibration equipment, as well as operating a world-leading temperature calibration laboratory, we are well-positioned to guide you in choosing the most appropriate solutions tailored to your specific needs. Factors such as the required temperature range, immersion depth, sensor types, and application demands must be carefully evaluated. Contact us today to get a free consultation, and we'll work with you to find the right temperature calibration solution.
Isotech
isotech.co.uk/consultancy/ T: 01704 543830
March 2024 Instrumentation Monthly
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