GPI TM Series Water Meters indicate batch, cumulative totals, and rate of flow measured in gallons, litres or cubic feet. They are easy to install with Spigot, NPT, BSP, 150# ANSI flange, or DIN flange fittings. The alkaline battery lasts for two years, and the non-volatile totals mean amounts are retained when batteries are replaced or power is lost.

TM Series meters are available with either a computer for local electronic display, or one of three versions of output modules to provide a digital signal to customer interfacing equipment. Fitting options include Spigot, NPT, BSP for 1in, 1-1/2in and 2in sizes, and 150# ANSI Flange or DIN Flange for 3in and 4in sizes.

The meters feature a flow range of 1 to 600 gpm (3.8 to 2271 lpm) with ±3% accuracy. Maximum pressure ratings are 225 psi (standard), 150 psi (BSP), or 135 psi (DIN). Operating temperature range is 32 to 140°F (0 to 60°C). The low-profile electronics are only 0.90in (23mm) high. CE approval, IP65 rating, and RoHS 2011/65/EU compliance are standard, with NSF certification for 3 and 4 inch models. Applications include OEM water treatment equipment/skids, water-based cooling systems, sub-metering of facility water usage, chemical feed systems, wastewater treatment equipment, irrigation, cooling towers, batching, blending, and plant process water.