Seametrics Multi Jet MJ-Series Water Flow Sensor

Seametrics Multi Jet MJ-Series Water Flow Sensor, 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. Seametrics offers cold or hot water models.

Seametrics Multi Jet |  Flow Meter Turbine

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).

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Seametrics Multi Jet Type of specification :

MJ Series – (Standart)

MJP Series -Plastic Body with NSF/ANSI standard 61

MJN Series -Brass Body with NSF/ANSI standard 61



  • *-E 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.
  • **-R meters use a two-wire reed switch. They provide dry contact closure and do not require power.
  • ***-T meters totalize only and do not have a sensor
  • Meter names that include “H” are hot water models (MJH). Without the “H” = cold water models (MJ)
Model -E -R -T
Power 6 mA at 12 Vdc
Temperature Coldwater 105 ̊ F (40 ̊ C) max
Hot Water 194 ̊ F (90 ̊ C) max
Pressure 150 psi operating (10.3 Bar)
Materials Body MJ Cast bronze, epoxy powder coated inside and out
MJP Plastic
MJN Eco-brass alloy (MJN)
Internals Engineered thermoplastic
Magnet Alnico
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)


Flow Rate

MJ- Series 3/4″ 1″ 1-1/2″ 2″ MJN/MJP Series 3/4″ 1″ 1-1/2″ 2″
Minimum 0.22 0.44 0.88 1.98 Minimum 0.22 0.44 0.88 1.98
Maximum 22 52 88 132 Maximum 22 52 88 132

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