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Looking for an easy-to-use, accurate, and reliable device to calibrate or test differential pressure air flow sensing switches in HVAC systems? Look no further than our Pressure/Vacuum Generator Handheld from Cleveland Controls. This versatile tool allows you to adjust the output pressure or vacuum range easily with separate coarse adjustment valves and a fine-tune output adjustment potentiometer. The ON/OFF pushbutton switch adds convenience, while the device is compatible with manometers and multimeters for precise readings. Use it to set point calibrate or test HVAC air flow sensing switches, and enjoy accurate control over your system's performance. The Pressure/Vacuum Generator Handheld from Cleveland Controls offers quick, efficient calibration with a wide range of adapter thread fittings (1/8 and 1/4 FNPT) to suit various applications.