DESCRIPTION
The flow meter and switch model DS04 works according to a modified variable area principle. The float is guided in a cylindrical measuring tube by means of a slotted nozzle. The flowing medium moves the float in the flow direction. An externally mounted pointer indicator is magnetically coupled to the float. It follows the float position and indicates the flow rate on a scale.

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 measuring range of the meter.


SPECIFICATIONS
Max Pressure:
  Brass- 200 bar (2900 PSIG)
  Stainless Steel- 300 bar (4,350 PSIG)
Pressure Drop: 0.02-0.4 bar (0.3-5.8 PSI)
Max Temperature: 120°C (optionally
  160°C) for liquids, 90°C for gases
Materials:
  Wetted Parts- Nickel plated brass or
    316Ti SS
  O-rings-
              Brass Version - Buna
              SS 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- 1.0-28 l/min to 20-1400 l/min
    (at 1.013 bar absolute and 20°C)