Profile: Max Machinery, Inc. provides precision flow meters, transmitters & indicators. Our piston flow meters features flow range of 200:1 or more, small displacements, scaled to flow rates and tightest fits & tolerances suitable for low viscosity liquids. It is ideal for fuel & hydraulic test stands, additive injection and brake fluid. The model 289 frequency transmitter is for helical flow meters which features pre amplified square wave output capable of driving at least 1000 feet and weather-tight & UL® class 1, division 1, groups C & D rated explosion proof options.