What are the Different Types of Digital Thermometers?

Digital thermometers are one of the types of temperature measuring instruments. According to the different temperature-measuring substances and temperature ranges used, there are kerosene thermometers, alcohol thermometers, mercury thermometers, gas thermometers, resistance thermometers, thermocouple thermometers, radiation thermometers, light thermometers, and bimetal thermometers.

Digital Thermometer

Digital thermometers are one of the types of temperature measuring instruments. According to the different temperature-measuring substances used and the temperature range, there are kerosene thermometers,

The digital thermometer uses imported chips to assemble with high precision, high stability, error 0.5%, internal power supply, micro power consumption, stainless steel casing, rugged protection, beautiful appearance.

Digital thermometer adopts imported high precision, low temperature drift, ultra-low power consumption integrated circuit and wide temperature type liquid crystal display. Built-in high-energy battery can work continuously for 5 years without laying power supply cables. It is a kind of high accuracy, good stability and extremely applicable Strong new field temperature display. It is an ideal substitute for traditional on-site pointer bimetal thermometers. It is widely used in various industrial and mining enterprises, colleges and universities, and research institutes.

Temperature number The physical quantity that we come into contact with in real-time production and life in real time, but it is invisible, and only the approximate temperature value can be felt only by feeling. Although the traditional pointer thermometer can indicate the temperature, the accuracy is low. It is not convenient to use, and the display is not intuitive enough. The appearance of digital thermometers allows people to intuitively understand how many degrees they want to know.

Digital thermometers use temperature-sensitive elements, that is, temperature sensors (such as platinum resistors, thermocouples, semiconductors, thermistors, etc.) to convert changes in temperature into changes in electrical signals, such as changes in voltage and current, temperature changes, and The change has a certain relationship, such as a linear relationship, a certain curve relationship, etc. This electrical signal can use an analog-to-digital conversion circuit, that is, an AD conversion circuit to convert an analog signal into a digital signal, and the digital signal is then sent to a processing unit, such as a microcontroller or a PC. Wait, the processing unit associates this digital signal with the temperature through internal software calculations to become a displayable temperature value, such as 25.0 degrees Celsius, and then displays it to a person for observation through a display unit such as LED, LCD or computer screen. This completes the basic temperature measurement function of the digital thermometer.

Digital thermometers have different accuracy, stability, temperature measurement range, etc. according to the different sensors, AD conversion circuits, and processing units. It is necessary to choose a digital thermometer that meets the specifications according to the actual situation.

Digital thermometers are hand-held, panel-mounted, and medically small.

The earliest

Meter name accuracy grade division value, ° C (Celsius)

Bimetal thermometers 1, 1.5, 2.5 0.5 ~ 20

Pressure type thermometer 1, 1.5, 2.5 0.5 ~ 20

Glass liquid thermometer 0.5 ~ 2.5 0.1 ~ 10

Thermal resistance 0.5 ~ 3 1 ~ 10

Thermocouple 0.5 ~ 1 5 ~ 20

Optical pyrometer 1 ~ 1.5 5 ~ 20

Radiation thermometer (thermoelectric stack) 1.5 5 ~ 20

Partial radiation thermometer 1 ~ 1.5 1 ~ 20

Colorimeter 1 ~ 1.5