Several issues when purchasing industrial thermometers for casting molten iron in front of furnaces
(1) The instrument needs to determine the temperature measurement range: The temperature measurement range is the most important performance indicator of the thermometer. Each model of thermometer has its own specific temperature measurement range. Therefore, the user's measured temperature range must be considered accurately and comprehensively, neither too narrow nor too wide.
(2) Determine the target size: When measuring temperature, the measured target area should fill the field of view of the thermometer. It is recommended that the size of the measured target exceeds 50% of the field of view. If the target size is smaller than the field of view, the background radiation energy will interfere with the reading, causing errors. Conversely, if the target is larger than the thermometer's field of view, the thermometer will not be affected by background radiation outside the measurement area.
(3) Accuracy: Of course, this must be considered when choosing any instrument. Infrared thermometers are no exception. The selection must also be considered comprehensively, not higher is better. To meet your own requirements and be within the cost budget as well.
(4) Determine the optical resolution The optical resolution is determined by the ratio of D and S, which is the ratio of the distance D between the thermometer and the target to the measurement spot diameter S. If the thermometer must be installed far away from the target due to environmental conditions, and small targets need to be measured, a thermometer with high optical resolution should be selected.
(5) When determining the response: The response time indicates the reaction speed of the infrared thermometer to the measured temperature change. If the target moves very fast or when measuring a rapidly heated target, a fast-responding infrared thermometer is required. When there is thermal inertia for stationary or target thermal processes, the response time of the thermometer can be relaxed. Therefore, the choice of the response time of the infrared thermometer must be adapted to the conditions of the target being measured.
(6) Consideration of environmental conditions: The environment in which the thermometer is located has a great impact on the measurement results. When the ambient temperature is too high, there is dust, etc., the protective cover and other accessories provided by the manufacturer can be used. These accessories effectively address environmental impacts and protect the thermometer for accurate temperature measurement
