Temperature is the most commonly measured parameter, no matter the industry. To maintain accuracy, temperature calibrator equipment is necessary. Measuring temperatures involves a wide range of specialty sensors such as thermistors, thermocouples, infrared sensors (IR), bimetal thermometers, and resistive temperature detectors (RTSs), which can make you understand what will fulfill your needs.
What is a Temperature Calibrator?
Temperature calibrators come in various styles and refer to as calibrators but can also be called a temperature indicator or temperature simulator.
A calibrator must verify that a temperature sensor reads the actual temperature within some tolerance in the environment in which it is applied. In addition, it must consist of a stable temperature source capable of reaching the desired range of temperatures.
Questions to Ask When Choosing an ISO 17025 Temperature Calibrator
- Do I need to calibrate sensors or temperature displays?
- What are the size and shapes of the sensors?
- Do you need speed to change temperatures?
- How deep does the liquid bath or dry block need to be?
- What temperature range is used?
- Multiple probes at a time?
- Can it be used in the field, or is it strictly laboratory?
The Three Specifications of a Temperature Calibrator
Three specifications are of vital importance when selecting a temperature calibrator. Understanding these three will allow you to choose the best calibrator.
- Accuracy: The accuracy between the instrument’s display temperature and the actual temperature of the calibration well. How closely the measured value is to the true value.
- Stability: When a calibrator reaches its set point, there is some fluctuation in temperature as the unit tries to maintain that temperature. The instability can impact the calibrations. Stability adds to the accuracy in determining overall system uncertainty.
- Uniformity: Temperature consistency of the heat source throughout the test zone. All calibrators have differences from the top, middle, and bottom. To gain uniformity, the user must place the probes in a way to minimize uniformity errors.
Dry blocks are versatile temperature calibrators that heat and cool a metal block to a specific temperature and maintain that temperature. It provides a stable temperature source and can be adjusted to test different points. In addition, they are lightweight and can easily be transported to the field.
A temperature calibration bath is a uniform enclosure with a stirred fluid that can be adjusted to numerous temperature test points. They provide excellent thermal contact, uniformity, and stability for temperature sensor calibration. In addition, because they don’t rely on drilled inserts, they can calibrate many inserts simultaneously.
Thermocouple / RTD Calibrators
Thermocouple / RTD Calibrators test the accuracy of temperature sensors through electronic circuitry. They can provide technicians with a simple, cost-effective way to test in the field.
Find the Solution for Your Needs
To maintain accuracy, calibrating temperature monitoring equipment is necessary. It is vital to go with quality manufactured products and work with a company that provides the best products but can repair them. It is an ISO 17025-accredited lab that can calibrate your equipment when needed. Do your due diligence and find a company to help you find the right solution for your industry’s needs.