How to order pipeline using a thermometer?

Pipeline with thermometer thermometer is we often say surface, it can be adsorbed on the surface of the object to be tested, so we call it the surface thermometer; And real use, this kind of thermometer used in the pipeline, so also called pipe with a thermometer. According to its structure, pipe with a thermometer can be divided into single spring pipeline thermometer, double magnet thermometer thermometer, single magnet pipes. These three pipe with the difference of the thermometer mainly surface directly and temperature range. So, how to order pipe with a thermometer? Single spring pipe the surface is 63 mm diameter of the thermometer, temperature range is 0 - can be measured 400C. Double magnet line the surface of the thermometer is 50 mm diameter, temperature range is 0 - can be measured 400C. Single magnet thermometer on the surface of pipe diameter is 63 mm, temperature range is 0 - can be measured 400C. At present, we only have these three specific pipe with a thermometer, if want to order. We can according to its using the environment temperature and suitable installation method to choose the suitable pipe with a thermometer.