Welcome to Key Instruments

Key Instruments offers flow meters and flow control valves for flow measurement in medical, industrial, chemical and laboratory applications. Our full product line includes acrylic flow meters, molded plastic flow meters, glass tube flow meters, pitot tube flow meters, electronic flow meters, flow control valves, variable area meters, flowmeter manifold systems and other rotameters.

For OEM applications, we offer precision-engineered sizes and flow ranges for a variety of fluids. Millimeter reference or direct read scales can be specified to meet your specific requirements. In addition, our flow laboratory offers NIST traceable calibration and certification services for your special needs.

Key Instruments also maintains a large inventory of standard VA meters, pitot tube flow meters and flow control valves for immediate delivery to meet your requirements.