Seametrics MJN Series Multi Jet Meter

MJN-Series meters use the multi-jet principle, which has been an internationally-accepted standard for many years. This type of meter is known for its wide range, simplicity, and accuracy in low-quality water.

Description

MJN-Series meters use the multi-jet principle, which has been an internationally-accepted standard for many years. This type of meter is known for its wide range, simplicity, and accuracy in low-quality water. The Seametrics MJN-Series is certified to NSF/ANSI standard 61. The impeller is centered in a ring of jets, with inlet jets on one level and outlet jets on another. A gear train drives the register totalizer dials. For pulse output, one of the pointers is replaced by a magnet, which is detected by an encapsulated sensor attached to the outside of the lens. Pulse rate is determined by the dial on which the magnet is placed, and by the number of sensors (single or double).

Changing the pulse rate requires no special tools and can be done in the field.
The MJN-Series has a brass body and is available in 3/4”, 1”, 1 1/2” and 2” versions.
MJNE meters use a solid-state, long-lasting Hall-effect sensor, which requires power. It is suited for use with Seametrics controls and metering pumps that have sensor power.
MJNR meters use a two-wire reed switch. They provide a dry contact closure and do not require power.
MJNT meters totalize only and do not have a sensor.

Brand

Seametrics

Seametrics

Seametrics, a member of the TASI Flow Group, is a designer and manufacturer of a variety of flow metering and submersible sensor products. Since 1990, we have provided innovative solutions to users in irrigation, fracking, water & wastewater, environmental, and processing applications. Our products have a reputation for durability and accuracy at a competitive price and are sold through our network of domestic and international distributors.

Located just south of Seattle, our Kent, WA factory is home to both our engineering and production groups. We employ just-in-time manufacturing methods and have a high commitment to continuous improvement as demonstrated by our ISO 9001 quality management system. Our focus on innovation, product value and customer accessibility has resulted in over two decades of continuous growth. Seametrics is dedicated to helping conserve the world’s most valuable resource by providing our customers with precision flow meter and environmental sensor products.

Feature

  • Certified to NSF/ANSI standard 61
  • Dry top multi-jet design
  • Tolerates low quality water
  • Simple pulse output

Application

  • Potable water
  • Cooling tower chemical control
  • Industrial water treatment
  • Deduct metering
  • Pump Pacing

Specification

Model MJNE MJNR MJNT
Power 6 mA at 12 Vdc
Temperature 105 ̊ F (40 ̊ C) max
Pressure 150 psi operating (10.3 Bar)
Materials Body Eco-brass alloy
Internals Engineered thermoplastic
Magnet Alnico
Fittings Lead-free tail piece
Accuracy ±1.5% of reading
Pulse Output Sensor Hall-effect device Reed switch Totalizer only
Max Current 20 mA+ 20mA n/a
Max Voltage 24 Vdc 24 Vdc or Vac n/a
Cable Length 12’ (4 m) standard (2000’ maximum run)
Regulatory Certified to NSF/ANSI standard 61, complies with Federal Public Law 111-380
Standards ISO4064 Class B, AWWA C708

Flow Range

Flow Rates (GPM) ¾” 1″ 1-½” 2″
Minimum 0.25 0.75 1.5 2
Maximum 20 50 100 160

Additional Information

Datasheet: Seametrics MJN Datasheet

Manual Instruction: Seametrics MJN Instruction Manual

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