DESCRIPTION
The flow meter and switch model DS01 works according to a modified variable area principle. The float is guided in a cylindrical measuring glass by means of a spring. The flowing medium moves the float in the flow direction. The upper edge of the float shows the momentary flow via an etched scale on the measuring glass.

A reed contact is mounted outside the meter in a sealed housing. The float contains a magnet. When the float reaches the position of the reed contact the switch will close. With higher flows the float moves further upward until it reached a built-in float stop, still keeping the switch closed. This ensures a bistable switch function at any time. The reed contact is adjustable over the full switching range of the meter.


SPECIFICATIONS
Max Pressure:
  DS01.1, DS01.2 - 16 bar (232 PSIG)
  DS01.3, DS01.4 - 10 bar (145 PSIG)
Pressure Drop:
  DS01.1 - 0.02 - 0.2 bar (0.3 - 2.9 PSI)
  DS01.2 - 0.02 - 0.3 bar (0.3 - 4.3 PSI)
  DS01.3, DS01.4 - 0.02 -0.4 bar (0.3 - 5.8 PSI)
Max Temperature: 120°C (optionally 160°C)
  for liquids, 90° for gases
Materials:
  Measuring Glass - Duran 50
  Housing - Aluminum
  Connections - Brass or Stainless
  O-rings -
                Brass Version - Buna
                SS Version - Viton (EPDM optional)
Mounting Position - Vertical (upward flow)
  or horizontal
Electrical Connections - DIN 43650 plug
Accuracy - ±10% f.s.
Ranges:
  Water - 5-60 ml/min to 60-150 l/min
  Air - 0.5-2.0 l/min to 200-625 l/min
    (at 1.013 bar absolute and 20°C)