A Honeywell Pneumatic Thermostat is a type of thermostat that uses a pneumatic system to regulate temperature. This type of thermostat is often used in industrial and commercial settings, as it is a reliable and cost-effective way to maintain temperature. The thermostat works by using a pneumatic system to detect changes in temperature and then actuate a valve to regulate the temperature accordingly. This type of thermostat is often used in conjunction with a heating and cooling system, such as a furnace or air conditioner, to maintain a comfortable temperature. The thermostat can be set to a specific temperature, and the system will automatically adjust the temperature to keep it within the desired range. The Honeywell Pneumatic Thermostat is a reliable and efficient way to maintain a comfortable temperature in any environment.