What kind of thermometer ventilation pipe should be used?

General building in order to keep the air circulation, can set up special ventilation pipes, ventilation pipes in order to better management, we also need to know the inside temperature, when the temperature is too high, we are also to take timely measures to cool down. The ventilation pipe should use what kind of thermometer? The commonly used ventilating duct is surface thermometer thermometer, because it is a use and measuring pipe temperature bimetallic thermometer, so called pipe thermometer more intuitive. It is widely used in heat treatment, industry, petroleum, chemical industry, etc, can be precisely and quickly showed that the temperature of the measured object, installation is very convenient. According to the installation in a different way, the thermometer can be divided into single spring pipes thermometer, double magnet pipeline thermometer, single magnet pipeline thermometer. These three pipe diameter difference is mainly surface thermometer and temperature range. Single spring pipe the surface is 63 mm diameter of the thermometer, temperature range is 0 - can be measured 400 c; Single magnet thermometer on the surface of pipe diameter is 63 mm, temperature range is 0 - can be measured 400C。