Hall Effect Flow Switch Model Q-15

Hall Effect Flow Switch

Model Q-15 is the most sensitive paddle type flow switch available. It utilizes Hall Effect technology and is programmed for the highest sensitivity.

Model Q-15 comes standard with 8 conductor modular cable and Cat 3 modular connector. Other cable/connector combinations available upon special order.

Max. flow may be five times normal flow.

Positive stop eliminates fatigue effects of turbulence, vibration and flow surge on flow detecting element.

Very low pressure drop - typically less than 1.0 psig at normal flow rate.

Small size and low profile provides easy mounting in crowded installations.

Switch employs magnetic coupling.

Flow Range

0.7–590 GPM (2.6–2,233 L/m)

Working Temp

180˚F (82˚C) Maximum

Working Pressure

250 psi (1.724 kPa)

Process Connection

3/4" NPT

Electrical Contacts

SPNO (single pole normally open) .25A (250 mA)


Monitoring flow of coolant supplied to:

  • Brakes and Clutches
  • Emergency Wash-Down Showers
  • Computer Systems
  • Marine and Stationary Engines
  • Diodes, SCRs, Triacs, etc.
  • RF and Radar Transmitters
  • Electromagnets
  • Spot welders
  • Fire Sprinkler Flow Alarms
  • Transformers
  • Lasers Vacuum Systems

In Chemical Processing:

  • Fluid Blending Systems
  • Liquid Transfer
  • Heat Transfer Fluids
  • Monitor Filter Clogging
  • Liquid Scrubbers
  • Starting back-up pumps
  • Monitoring pump output, valve position, systems flow status

In Water Treatment:

  • Irrigation Systems
  • Salt and Fresh Water Systems




SPNO (single pole normally open)

Input Voltage 8 to 24 vdc

Contact Rating

Switching Voltage 28 vdc max

Switching Current 1.5 amp (250 mA) max

Contact Resistance .25 ohms