Alicat Scientific is the world's fastest mass flow meter, mass flow controller, and pressure controller manufacturer. Founded in 1991 and headquartered in Tucson, Arizona, the company was acquired by Halma in 2010 and operates as part of the group's Environmental and Analysis business. Alicat pioneered laminar differential pressure flow technology, which enables response times as low as 4 milliseconds and delivers precise, repeatable measurements across an exceptionally wide turndown ratio.

The product portfolio spans gas mass flow meters and controllers, liquid mass flow meters and controllers, pressure meters and controllers, gas mixers, portable flow meters, and complementary accessories and software. All instruments are ISO 9001, CE, and RoHS certified, come with NIST-traceable calibration certificates, and are available with optional ATEX and CSA certifications for hazardous locations. With over 600,000 instruments in operation worldwide, Alicat serves industries including aerospace and defense, bioreactors and fermentation, calibration and metrology, environmental monitoring, food and beverage, gas chromatography, hydrogen energy, leak testing, oil and gas, pharmaceutical manufacturing, and thin film deposition. For engineers and system integrators who require high-speed, high-precision flow and pressure control—backed by responsive application support and rapid delivery—Alicat Scientific delivers instruments that simply work, every time.