The Tronair Cabin Pressure Tester utilizes an external compressed air supply for pressurizing and testing the integrity of the aircraft cabin, door, canopy seal and outflow and safety valves. The compressed air is supplied to a filter/separator through a safety valve, a high flow precision regulator, passed through a flowmeter and then out to the aircraft cabin. The rate of climb indicator allows the operator to monitor the system while pressurizing and depressurizing the aircraft. For more information visit www.tronair.com or call (419) 866-6301.