DESCRIPTION
The flow meter and switch model DS03 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. When the float reaches the position of the reed contact the switch will close. With higher flows the float moves further upward until it reaches 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: 10 bar (145 PSIG)
Pressure Drop: 0.01-0.2 bar
  (0.2-2.9 PSI)
Max Temperature: 120°C (optionally
  160°C) for liquids, 90°C for gases
Materials:
Measuring Glass - Duran 50
Housing - Aluminum
Connections - Brass or Stainless
O-rings -
              Brass Version - Buna
              Stainless Version - Viton  
Electrical Connections- DIN 43650 plug
Accuracy - ±5% f.s.
Ranges:
Water - 0.1-1.5 l/min to 10-150 l/min
Air - 3.0-30 l/min to 350-2750 l/min
  (at 1.013 bar absolute and 20oC)