Infrared thermometer advantages and disadvantages and the use of precautions
Advantages of infrared thermometer
1. Non-contact measurement: it does not need to contact the measured temperature field inside or on the surface, therefore, will not interfere with the state of the measured temperature field, the pyrometer itself is not subject to temperature field damage.
2. Wide measurement range: Because it is non-contact temperature measurement, the pyrometer is not in a higher or lower temperature field, but works
In the normal temperature or thermometer allows the conditions. In general, it can measure negative tens of degrees to more than three thousand degrees.
3. Temperature measurement speed: that is, the response time is fast. As long as the infrared radiation received from the target can be set in a short period of time.
4. High accuracy: infrared temperature measurement will not destroy the temperature distribution of the object itself as contact temperature measurement, so the measurement accuracy is high.
5. High sensitivity: as long as there is a small change in the temperature of the object, the radiant energy will have a large change, easy to measure. Can carry out temperature measurement and temperature distribution measurement of tiny temperature field, as well as temperature measurement of moving or rotating objects. Safety in use and long service life.
Infrared thermometer shortcomings
1. susceptible to environmental factors (ambient temperature, airborne dust, etc.)
2. For the bright or polished metal surface temperature readings have a greater impact
3. Limited to measuring the temperature of the outside of the object, it is not convenient to measure the temperature inside the object and the presence of obstacles
Notes on the use of infrared thermometer
1. Must accurately determine the emissivity of the object being measured.
2. Avoid the influence of high-temperature objects in the surrounding environment.
3. For transparent materials, the ambient temperature should be lower than the temperature of the object to be measured.
4. The pyrometer should be vertically aligned with the surface of the object to be measured, in any case, the angle can not exceed 30 ° C
5. Can be applied to bright or polished metal surface temperature measurement, not through the glass for temperature measurement.
6. Correctly select the coefficient of divergence, the target diameter must fill the field of view.
7. If the infrared thermometer is suddenly in the ambient temperature difference of 20 ℃ or higher, the measurement data will be inaccurate, temperature temperature equilibrium and then take its measured temperature value.
