A coating system selecting kinds of coating heads and operation sequences with no errors even when two or more kinds of coating heads are used in exchange in a single coating line. The tire pressure gauge includes a pressure sensor for detecting a pressure of a fluid in a tire and providing an output signal indicative of the detected fluid pressure, and a first radio-frequency module for transmitting data indicative of the detected fluid pressure based on the output signal of the pressure sensor. 05 to 2% by weight of tamarind seed polysaccharide and from 0. The switch is switched on and off by the control signal.