Choosing the right McCrometer irrigation flow meter starts with three things: your pipe size, your pipe type, and the flow range your system needs. Discount Irrigation carries McCrometer bolt-on saddle flow meters for PIP and OD irrigation pipe in 4-inch, 6-inch, 8-inch, 10-inch, and 12-inch sizes.

Shop McCrometer irrigation flow meters

Choose the meter that matches your pipe size

Use the model that matches the pipe size and expected flow range of your irrigation system. If your expected flow falls near the edge of a meter's range, confirm the application details before ordering.

Check PIP and OD pipe compatibility

These McCrometer bolt-on saddle meters are listed for PIP and OD pipe applications. Confirm the pipe outside diameter and the exact meter model before purchase, especially when replacing an existing meter or installing on an older irrigation main.

Plan the installation for accurate readings

• Provide at least 5 pipe diameters of straight pipe upstream of the meter.
• Provide at least 1 pipe diameter of straight pipe downstream.
• Keep the pipeline full of water for accurate measurement.
• Most installations are horizontal. Vertical installation may be specially ordered.
• When properly ordered and installed, the listed accuracy is within +/- 2% of actual flow.

How McCrometer flow measurement works

A propeller positioned in the center of the flowstream rotates at a speed proportional to the moving water. That rotation is transmitted mechanically to a register, which displays instantaneous flow rate and accumulated volume through an indicator and totalizer. The register case is hermetically sealed and includes a hinged lens cover with a locking clasp.

Compare the McCrometer models

For a quick comparison, start with the 4-inch MD304 for lower flow ranges and move up through the MD306, MD308, MD310, and MD312 as pipe size and expected flow increase. Visit the McCrometer flow meter collection to compare the available models and review each product's specifications before ordering.