This 184 Rigid Bulb Temperature Transmitter is a direct-acting, one-pipe instrument that senses temperature and transmits a proportional 3 to 15 psi pneumatic signal to a remotely-located receiver gauge and/or receiver controller. This transmitter has a temperature range of 0 to 100 degrees Fahrenheit, a rod and tube thermal system and a mounting flange. The bulb measures 1/4-inch diameter and is 9 ft long.