Spring is one of the types of surface thermometer thermometer, its principle is to rely on the double metal heat bilges cold shrink principle of sensors to work, by contact spring or magnet at the bottom of the thermometer to measure the metal surface and reading. Spring the measuring range of the thermometer can from - 40 c to 400 c, the precision can be in for some using occasions for accuracy is not high, can yet be regarded as a money and cheap thermometer of beauty. ST221SS is a best-selling spring thermometer, hope that we will pay attention to! Spring loaded surface thermometer when use should pay attention to the length of the spring and the pipe diameter to be fixed. In addition, when using, pay attention to clean up and check, regularly test the measured values.
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