Dwyer Series WMH Multi-Jet Hot Water Meter



Flow includes Flow Transmitters, Flow Sensors, Flow meters, Sight Flow Indicators and Water Meters. Mass Flow meters, Controllers, Flow Indicators and Controllers are ideal for measurement of flow rates. Flow Switches come as paddle, thermal, piezo, and shuttle/piston.

Water Meters are sensors that indicate flow totalization of water. Available are local and remote indication models. Dwyer's multi-jet models are economical and dry dials. Each meter applies to different applications. Dwyer water meters are designed for long service life and maintenance-free operation, even under harsh conditions.

The Series WMH Multi-Jet Hot Water Meter are a series of mechanical, water totalizing meters that display the total water usage in gallons with m3 options. They are available in a range of body sizes and include NPT or BSPT optional couplings. The high temperature resistant brass body is compatible in applications with high temperature water no suitable with standard brass water meters and maintains its accuracy.


  • High temperature threshold of 190°F (88°C) ideal for high temperature applications
  • Multi-jet design allows for simplicity and accuracy with wide flow ranges, even in low flow applications
  • Magnetically driven, hermetically sealed register does not leak or fog and is completely separated from the water
  • Designed for long service life and maintenance-free operation
  • Integral strainer that protects meter from particulate damage
  • Easy installation with included coupling adapters
  • Pulsed output proportional to flow allows for remote flow totalization


  • HVAC applications
  • Measuring total condenser water flow in residential, commercial and industrial applications
  • Remote hot water monitoring

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Wetted MaterialsBody: Brass; Couplings: Brass; Measuring Chamber: Brass.
Flow RangeSee model chart on catalog page.
AccuracyWMH-A-X-XX: Transitional Flow: ±3%; Nominal Flow: ±1.5%.
Temperature Limit190°F (88°C).
Pressure Limit150 psi (10 bar).
Totalizing Display MaximumSee model chart on catalog page.
Output SignalPulse output with frequency proportional to flow rate.
Pulse Options0.1 gal, 1 gal, 10 gal, 100 gal per pulse (1 L, 10 L, 100 L, 1000 per pulse) See model chart on catalog page. (Consult factory for m3, BSPT units or additional pulse output options)
Electrical Rating0.01A @ 24VAC/DC.
Electrical ConnectionsColor-coded lead wires, 4.5' (1.5 m) long.
Mounting OrientationHorizontal with register facing up.
WeightSee dimension chart.

Ref: dwyer-inst.com

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Download Data Sheet: Series WMH Multi-Jet Hot Water Meter