• Savings in compressed air and maintenance costs
  • Reduced CO2 emissions
  • Reduced labor cost (reduced pump change outs)
  • Light weight
  • Efficient reliable operation
  • No lubrication Required
  • Anti-Static rear housing ensures continuity of FRAS hosing
  • Plastic and stainless-steel construction ensures no corrosion problems
  • Simple to maintain


The Standard Air Operated Float Switch

Part No: 707WM01

This pneumatic float switch is manufactured from polypropylene with an ANTI STATIC rear housing to comply with stringent coal mining regulations.

The 50cm long float rod gives an operating travel of 5cm to 43cm which is adequate for most applications. Should a longer rod be required one is available 1.3m long.

FRAS Pneumatic Float Switch

Part No: 707WM02

This air operated float switch is manufactured from flame retarded nylon with an ANTI STATIC rear housing to comply with stringent coal mining regulations.

This pneumatic float valve is meant for hazardous locations.

All the float switches come with a standard 50cm float rod

Borehole Monitor

Part No: 707WM03

This float switch comes mounted in a 10” pipe for use in sump drainage and easy installation. Pipe height 74cm (29″)

Reverse Monitor

Part No: 707WM05

This is a standard float switch that has been modified to work in reverse.

The float switch body is mounted upside down so when the float ball comes up it turns the pump off to prevent overflows.


Part No: 707WM06

Made from polypropylene with an anti- static rear housing designed for shallow nuisance water holes with tolerance to flowing water and turbulence.


Water management practices in most mines using pneumatic pumps results in the pumps running 24/7. In actual practice the majority of pumps only need to run a small percentage of the time. This wasteful practice can easily be overcome with the installation of a WATER MONITOR air operated float switch which will turn the pump on when required, reducing air consumption, maintenance, co₂ emissions and electricity costs.

One particular mine after installing WATER MONITORS noted that a particular pump had dropped from 24/7 operation to 25 minutes a day.

Many WATER MONITORS have gone into industrial situations such as wastewater sumps. Another use where spillage was a problem the WATER MONITOR was modified and turned upside down and mounted on the tank so as to turn the pump off when the tank was full.


Note the graph to the Right shows projected savings over a 12-month period when a water monitor float switch is used, resulting in a 60% reduction in pump running time.