If the air temperature changes objects with large masses will be slower to change. The IR Thermometer is measuring the surface temperature of the object you are pointing it at which may not be the same as the air temperature. If you can locate the sensor measure as close as possible to it.
The wall thermostat is showing the temperature where the sensor is located. Why doesn’t the IR thermometer show the same room temperature readings as my wall thermostat? If you move the IR closer to the pipe until the diameter of the pipe if greater than the FOV then you will get accurate readings. If the field of view for the IR thermometer is greater than the diameter of the pipe at that particular distance then the readings may not be accurate because the thermometer will be reading surfaces behind the pipe as well as the pipe. The accuracy of the readings will be affected by the field of view. Can I use the IR Thermometer to measure a 2” diameter pipe? The larger the size of the mesh – the larger the error. The readings may not be accurate as the IR thermometer will be reading through the holes in the screen also.
Can I use the IR Thermometer to measure a screen or wire mesh? Then the IR temperature should be the same as the inside temperature. The only way to prevent this is to cover the outside of the bag to insulate it from the warmer air. Mixing the blood in the bag before taking a reading will cool the outside some. But after a few minutes at room temperature the outside of the bag gets warmer – even though the blood inside is still cold. This is OK if the bag is in the cold environment because the outside of the bag will be the same as the inside. The thermometer only measures the temperature of the surface of the bag. Back to FAQs Infrared Thermometers FAQs I am with a blood bank and my IR thermometer shows the outside of my blood bag about 2☌ higher than temperature I get with my probe type thermometer measuring the blood inside.
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