Mast II

MAST (Mobile Advanced Step Tester) is a radio based system which gives the operator immediate notification of flow change at the receiver as a valve is operated. This allows potential leak areas to be quickly identified and quantified, avoiding the need to complete a full step test for later comparison with logged data.


Step testing is an effective, flow-based method of localizing water loss within a zoned distribution system. It works by continually measuring the flow of water into a zone as valves are shut off in sequence.

Testing usually takes place during the night when water consumption is at its lowest so that shutting off the supply causes minimum disruption. The areas of the pipeline showing unexpected water losses can then be identified and investigated.

Step Testing can be used in all networks, but is particularly suited to identifying areas of leakage on plastic pipe materials, where leak noise is absorbed and conventional acoustic methods are less effective.

The MAST system comprises two instruments:

  • A data logging unit with high power radio transmitter
  • A portable flow indicator/recorder with integral radio receiver.


  • Designed for portability and ease of use.
  • Interface to all standard meter types.
  • Improved radio telemetry to improve speed of data transfer.
  • Real-time data provides instant response to flow changes.
  • Highly accurate method of detecting potential leak sites on plastic pipes.
  • Water loss localised to a specific area (“step”).
  • Single user operation.
  • Luminous keypad.
  • Data storage and valve closures are time-synchronised with graphical results.
  • Minimal consumer disruption.
  • MAST radio coverage up to 6 miles


Mast II