• Available in 1/2 inch to 4 inch meters
  • Flow ranges to 600 GPM
  • Fitting Type: NPT, Spigot, Flange (3 and 4-inch models)
  • Accuracy: ±3%
  • 225 PSIG Pressure Rating at 73°F
  • Temperature Range 32 to 140°F (0 to 60°C)
  • Display and/or pulse output available


The GPI TM Series Water Meter is a durable lightweight flow meter available in sizes from 1/2 to 4 inches and flow rates from 1-10 GPM to 60-600 GPM. With a basic accuracy of ±3%, the TM Series is well suited for sub-metering facility water usage, small waste water treatment equipment, or water based cooling systems. The TM Series is available with a range of fittings, including: flange, NPT or schedule 80 spigots. These GPI Flow Meters feature an LED readout and/or pulse output that can determine batch, cumulative totals and rate of flow in gallons, liters or cubic feet.

Wetted Materials

  • Housing: PVC
  • Bearings: ceramic (1/2 to 2-inch models; PEEK (3 and 4 inch models)
  • Shaft: tungsten carbide (1/2 to 2-inch models; stainless steel (3 and 4 inch models)
  • Rotor: PVDF (1/2 to 2-inch models; acetal (3 and 4 inch models)


This product can be used in the following applications:

Here's how some of our customers use this product...

Inexpensive Batch Control

The Background: The customer, a water treatment company focusing on corrosion control, is developing new procedures and requires a flow meter to be used as part of their testing protocol.

The Problem: The flow meter must be compatible with a batch controller and price is a major consideration.

The Solution: We recommended the GPI TM series with pulse output paired with the KEP MB2 batch controller. These were used to control a Georg Fisher Type 104 ball valve. This set-up allows precise batching at a great price.