The Seametrics MJ Series pulse water meter is a contacting head water meter which utilizes the multi-jet principle, an internationally-accepted standard for many years. Multi-jet flow meters utilize an impeller which is centered in a ring of jets, with inlet jets on one level and outlet jets on another. This type of meter is known for its wide range, simplicity, and accuracy in low-quality water .

The Seametrics MJ Series is available in sizes ranging from 3/4 to 2 inch with flow ranges from 0.22 to 132 gpm (depending upon meter size) and accuracy of ±1.5% of reading. The 100:1 turndown ratio ensures reliable measurement across the entire flow range. Both hot water (194°F maximum) and cold water (105°F maximum) models are available .

The meter is available with a totalizer or pulse outputs. Pulse outputs are either a solid-state, long-lasting Hall-effect sensor, which requires power, or a two-wire reed switch which provides a dry contact closure and does not require power. Pulse rates are factory-set to customer specifications but can easily be changed in the field without special tools. The rugged epoxy-coated bronze bodies with union ends and true dry-top construction ensure long service life in demanding applications .

Applications include metering pump pacing and water treatment control. The wide range of field-changeable pulse rates allows for flexible integration with various control systems .