• 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.

In Stock

We're sorry, but no items are currently in stock.

Interested in Other Part Numbers?

Other part numbers are available to order but are not currently in stock. Current availability for non-stock parts is "Limited to in-stock inventory". Click here to select options