Exair 01-018021-305 Fenwal Thermoswitch 9017 Thermostat with Capacitor

The Exair 01-018021-305 Fenwal Thermoswitch 9017 is a precision temperature control thermostat designed for industrial applications, particularly in compressed air systems and equipment like vortex tubes or cabinet coolers. Manufactured by Fenwal Controls (now part of Kidde-Fenwal) and integrated with an Exair capacitor for enhanced thermal protection, this device features a cartridge-style design with adjustable set points for reliable temperature switching. It operates by closing contacts on temperature rise, preventing overheating in sensitive equipment. Key benefits include high accuracy, durability in harsh environments, and easy installation via threaded mounting. Compared to similar thermostats, it offers superior response time and a wide temperature range, making it ideal for HVAC, process control, and machinery protection. Drawbacks may include the need for precise calibration and potential sensitivity to vibration if not properly mounted. The included Exair capacitor (models like 4519 or 9017) adds surge protection and stabilizes switching, extending device lifespan. This unit is suitable for applications requiring thermal cutoffs, such as in Exair's air amplification products, ensuring safe operation and energy efficiency.