Thermometers & Accessories
Temperature measurement is an important factor in many industries and applications. Thermometers are used in health care, food processing, industrial process control, manufacturing, commercial HVAC maintenance, and scientific research applications, among others. They measure the temperature of air, liquids, solids, or surfaces. Many different types of thermometers are available, and different applications require specific types of thermometers. A choice of thermometer first depends upon the measurement application; other considerations include the temperature range to be measured, the accuracy and resolution required, and the environment in which the thermometer will be put to use.
A digital thermometer measures temperature electronically with a temperature sensor and provides a reading on an LCD screen. Sensor types vary and include thermistors, thermocouples, RTDs (resistance temperature detectors) for contact temperature measurements, and infrared sensors for non-contact measurements. A contact digital thermometer typically has a probe that touches the substance or surface to be measured. Some probes can be immersed in liquid, penetrate a substance, or even wrap around a surface to take a measurement.
Other types of thermometers are bi-metal thermometers and non-mercury thermometers. A bimetallic thermometer incorporates a coil of two metals that respond to temperature change. It is commonly used in food service, food processing, and industrial applications. A mercury-free thermometer is a glass tube containing a liquid such as alcohol that rises in response to temperature change. Mercury-free thermometers are commonly used in medical and scientific research applications.
Thermometer accessories include replacement parts, cases and storage racks, probes, cables, calibration keys, and thermowells. A thermometer probe is a common accessory for commercial and industrial thermometers. It contains a sensor to take measurements, and it connects to the thermometer to record and display the measurements. A probe may have a thermocouple sensor, such as a Type-K thermocouple, or it may have a thermistor or RTD sensor.