FlowMeters.com”s MAC Series electromagnetic flowmeters are designed for reliability in measuring very low flows of electrically conductive chemicals and fluids of varying viscosities. The flowmeters are small, plastic-bodied instruments capable of measuring pulsating flows from air and solenoid-driven metering pumps. The “minimag” meters are offered in three sizes that accommodate nominal maximum flowrates from one to eight gallons per minute. The meters transmit a continuous flow signal, measure and display both flowrate and total flow, and provide a variety of outputs including relay alarm outputs. The flowmeter sizes and their nominal full-scale flowrates are: 1/4″, one gallon per minute (3.8 liters per minute); 3/8″, three GPM (11 LPM); and 1/2″, eight GPM (30 LPM). Low-flow cutoffs for each size are: 1/4″, .009 GPM (.04 LPM); 3/8″, .025 GPM (0.1 LPM); and 1/2″, .065 GPM (.25 LPM). The meters have a four to 20 mA, zero to five volt flow signal and a frequency signal (up to 9,999 pulses per gallon) proportional to flow. The meters also have relay alarm outputs that signal if flow goes above or below user-set flow levels. Flowrate is displayed in user-selected time and volume units (for example, liters per minute). Total flow is displayed in the chosen units up to eight digits. Flow measurement accuracy is +/- 1 percent of reading above 10 percent of full scale, +/- 3 percent below 10 percent of full scale. They tolerate fluid temperatures up to 185 F and pressures up to 150 PSI at 75 F. Wetted materials include a body of Kynar PVDF, electrodes of platinum or Hastelloy corrosion-resistant alloy, and internal seals of Viton fluoroelastomer. Housings are of fusion-coated aluminum with polycarbonate control/display units.