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WMP-Series Magmeter by Seametrics

WMP Irrigation Magmeter by Seametrics @ Procon Instrument TechnologyPlastic Bodied Magmeter suitable for Agricultural & Industrial based applications

The SeaMetrics WMP-Series is a full-bore, plastic-bodied electromagnetic flow meter designed for flow and usage monitoring applications in 1, 2 and 3 inch pipe. The polypropylene flow tube offers corrosion resistance to a wide range of chemicals and fertilizers.

It is light weight and easy to install or remove from the pipe for inspection. With no moving parts, the magmeter permits unobstructed flow, minimizing flow disturbances and straight pipe requirements. The WMP Series can be used in piping configurations where there is little space between the meter and an elbow or valve, it is also resistant to wear from sand and debris found in ground or surface water. As there are no bearings or propeller to wear out, maintenance and repair costs are kept to a minimum and it tolerates high flows without damage.

A hinged polyethylene cover is a standard inclusion that protects from dust and UV rays, while permitting easy access to the flow rate and total display. The electronics housing can be fitted with cross-drilled screws and seal wire for tamper-evidence. Flow rate and total can be displayed in a variety of units, customer-selected and factory-set.

The WMP101 is externally powered via a 5-pin connector cable (20ft/6m) which also provides pulse output for use with a variety of Seametrics and other displays and controls for remote reading, data logging, pulse-toanalog conversion, and telemetry applications. While the WMP104 is a battery-operated unit for use when pulse output is not required. The standard batteries are user replaceable with an approximate 1 year life depending on usage. An extended battery life option offers an estimated 2-4 year life depending on usage. In the event of DC power loss, or when changing batteries, the WMP will retain internal settings and flow total.


Applications: Industrial Wastewater discharge, Grey Water, Well Monitoring, Irrigation, Mining.


  • No moving parts
  • Minimal straight pipe required
  • Battery powered
  • Built-in rate & total indicator
  • Corrosion resistant
  • Pulse output (WMP101 modle only)

Features of the WMP by SeaMetrics


Available WMP series models:

  • WMP101
  • WMP104

Pipe Sizes 25.4mm (1"), 50.8mm (2"), 76.2mm (3”) full port
Fittings 1" NPTF, 2" or 3" flange clamps with 2" or 3" NPTF fitting kit
Pressure 150 psi (10.3 bar) working pressure @ 21°c
Operating Temp
Operating: -12˚ to 54˚C
Non-operating: -40˚ to 80˚C
±1% of reading (between 10% and 100% of maximum flow)
±3% of reading (between cutoff and 10% of maximum flow)
Flow Range

Minimum: 1" - 2.3 gpm (0.145 l/s)   2" - 6 gpm (0.38 l/s)  3" - 14 gpb (0.88 l/s)

Maximum: 1" - 110 gpm (6.94 l/s)   2" - 300 gpm (18.9 l/s)  3" - 670 gpb (42.3 l/s)


Body: Glass filled polypropylene

Electrodes: 316 stainless steel

Electronics Housing: Power coated diecast aluminium

Display Cover: Polyethylene

Display refer to Data Sheet
Security Cross-drilled screws and tamper-eviddent seal (optional)
Power WMP101
10 - 30 Vdc @ 60mA maximum (15mA average)* 
6 - AA 1.5v lithium cells, replaceable. Estimated life is 1 year** 
2 - C 3.6V lithium batteries, replaceable. Estimated life is 2 - 4 years** (extending battery life optional)
Pulse Output Signal (WMP101 only)
Current sinking pulse, opto-isolated, 32Vdc maximum @ 10mA maximum
Pulse Rate (WMP101 only) refer to Data Sheet


4-20mA Current Loop - Isolated, passive, 24Vdc, 650 Ω maximum current loop
HART/4-20mA - HART protocol over 4-20mA line
High Speed Digital Output (AG3000 & AG3000p only) - Isolated, open collector, 24 Vdc
Serial Communications -  Isolated, asynchronous serial RS485 (Reconfigurable for RS232 or 3.3V CMOS), Modbus® RTU protocol (factory selectable)
Empty Pipe Detection
Hardware/software, conductivity based
Conductivity >20 microSiemens/cm
Environmental NEMA 6P, IP68 (10ft (3m) depth, continuously)
Electrical Connection (WMP101 only) 5 - pin male circular connector, mates to industry standard cable
Specifications subject to change. Please consult our website for the most current data
* Note: using an unregulated power supply > 18Vdc may damage the meter due to AC line input voltage fluctuation
** depending on usage ** (standard) 

WMP Series Magmeter Document Downloads

DOWNLOAD PDF  for the WMP Magmeter by Seametrics

Flow Type: Liquid Flow Meters