Piston



  • For domestic 15mm or 22mm pipes
  • 0.8-6 l/min switching range
  • 15mm / 22mm compression fittings
  • Rated to 8 Bar pressure
  • User adjustable

  • For 25mm pipe sizes
  • Detects low flows from 0.1 l/min
  • 1”BSP connections
  • Pressure up to 100 bar
  • Max Flow 100 l/min
  • Reed switch or relay option
  • 8mm pipe size
  • 0.04 - 3 l/min switching range
  • 1/4” threaded connections
  • Pressure up to 350 bar
  • Brass or stainless steel option
  • -20..+100 °C optionally 160 °C
  • For 15mm to 25mm pipe sizes
  • Detects flows from 2.5 l/min
  • 1” BSP Threaded and PVC push fit
  • Pressure up to 18 bar
  • No metal wetted parts
  • 100 l/min max flow
  • Nominal pipe sizes 8-25 mm
  • 0.1 - 80 l/min switching range
  • 1/4” - 1” BSP threaded connections
  • Pressure 200 bar (500 bar option)
  • Brass or stainless steel option
  • Viscosity compensated version(HD2K)
  • For 32-50 mm pipe size
  • 2-220 l/min switching range
  • 1 1/4” - 2” threaded connections
  • Brass or stainless steel option
  • Pressure up to 200 bar
  • Viscosity stabilised
  • For 15 mm nominal width
  • 0.4-12 l/min switching range
  • 1/2” male threads
  • Integrated filter
  • Plastic wetted parts
  • Up to 10 bar pressure
  • For 15 mm pipe size
  • 1 l/min switching point
  • 1/2” threaded connections
  • Bi-directional flow switching
  • Pressure up to 300 bar
  • Viscosity stabilised
  • Nominal pipe sizes 8-25 mm
  • 0.1 - 80 l/min switching range
  • 1/4” - 1” BSP threaded connections
  • Optionally side or top displays
  • Brass or stainless steel option
  • Viscosity compensated version(HD2F)
  • Nominal pipe sizes 8-25 mm
  • 0.4 - 60 l/min switching range
  • 1/4” - 1” BSP threaded connections
  • Pressure 200 bar (500 bar option)
  • Brass or stainless steel option
  • -20..+120 °C (-20..+150 °C option)
  • Nominal pipe sizes 8-25 mm
  • 1 - 11 l/min switching range
  • 1/4” - 1” BSP threaded connections
  • Not affected by dirt
  • Brass connection material
  • 230Vac/0.5A reed switch
  • For 8 mm pipe
  • 0.005 - 5l/min display ranges
  • 1/4” BSP threaded connections
  • Maximum temperature 100 °C
  • Switching contact option(VFR)
  • Brass or Stainless Steel
  • Nominal pipe sizes 8mm to 80 mm
  • 1 - 600 l/min switching ranges
  • 1/4” -3” BSP threaded connections
  • Medium Temperature -20 °C to 120 °C
  • 720 l/min max flow
  • ATEX option available
  • Nominal pipe sizes 15mm to 100 mm
  • 2 - 1600 l/min switching ranges
  • Flanged process connections
  • Medium Temperature -20 °C to 120 °C
  • Up to 8000 l/min max flow
  • ATEX option available
  • For 25mm pipe sizes
  • Detects low flows from 0.23 l/min
  • 1” BSP male to 1” BSP female thread
  • Pressure up to 200 bar
  • Rated from -20 °C to 90 °C
  • 100 l/min max flow
  • Nominal pipe sizes 10mm to 80mm
  • 2 - 500 l/min switching ranges
  • Screw Connection with socket
  • Medium Temperature -20 °C to 60 °C
  • 250 l/min max flow
  • No contact switching
  • Nominal pipe sizes 8mm to 25 mm
  • 2 - 80 l/min switching ranges
  • 1/4” -1” BSP threaded connections
  • Maximum temperature 100 °C
  • Viscosity stabilised option (NJV)
  • Brass or Stainless Steel
  • For 6 mm to 20 mm pipe sizes
  • Detects low flows from 0.30 litres per hr
  • 3/4” BSP unions with PVC push fit
  • Vertical Installation only
  • No metal wetted parts
  • Suitable from 1 to 14 liquid PH level
  • Nominal pipe sizes 32-50 mm
  • 15 - 80 l/min switching range
  • 1 1/4” - 2” BSP threaded connections
  • Pressure 200 bar
  • Brass or stainless steel option
  • Lower Pressure Loss
  • Nominal pipe sizes 32-50 mm
  • 10 - 150 l/min switching range
  • 1 1/4” - 2” BSP threaded connections
  • Pressure 200 bar
  • Brass or stainless steel option
  • Lower Pressure Loss
  • Adjusted to switch between 0.015 and 0.4 l/min H2O
  • Sizes from 1/4″ to 1/2″ BSP
  • Low pressure loss design
  • Bronze body
  • Reed switch rated at 250Vac/1A 50VA
  • Can be used with liquids and gases
  • Nominal pipe sizes 8mm to 15mm
  • 0.4 - 12 l/min switching ranges
  • 1/4” -1/2” BSP threaded connections
  • Pressure up to 200 bar
  • 20 l/min max flow
  • High switching power
  • Nominal pipe sizes 8mm to 40mm
  • 0.4 - 90 l/min switching ranges
  • 1/4” -1 1/2” BSP threaded connections
  • Medium Temperature -20 °C to 110 °C
  • 150 l/min max flow
  • Lower Pressure Loss
  • For 20mm pipe sizes
  • Detects low flows from 0.065 l/min
  • 3/4” BSP unions with PVC push fit
  • Pressure up to 18 bar
  • No metal wetted parts
  • Reed switch or relay option
  • For 15 mm pipe sizes
  • Detects low flows from 0.1 l/min
  • 1/2” BSP connections
  • Pressure up to 100 bar
  • Max Flow 30 l/min
  • Reed switch or relay option
  • Nominal pipe sizes 15-25 mm
  • 1 - 11 l/min switching range
  • 1/2” - 1” BSP threaded connections
  • Not affected by dirt
  • Plastic connection material
  • 230Vac/0.5A reed switch