DS07 Viscosity Compensated Variable Area Flowmeter and Switch, Mounting Independent

DESCRIPTION
The flow meter and switch model DS07 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 a burnt-in 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 measuring range of the meter.

VISCOSITY COMPENSATION, MOUNTING POSITION AND RELIABILITY
The built-in spring and the magnetic float guarantee an absolute reliability of the meter. This spring, which pushes the float back towards its zero position against the flow makes it possible to use the meter in any mounting position. The spring is artificially aged, thus eliminating the need for recalibration to the different mounting positions. The strong spring and an orifice in the float work together to limit the effects of viscosity changes to an absolute minimum compared to regular variable area flowmeters.

TECHNICAL SPECIFICATIONS
Max Pressure:
  232 psi / 16 bar (DS07.M)
  145 psi / 10 bar (DS07.S)
Pressure Drop:
  0.29 - 2.9 psi / 0.02 - 0.2 bar (DS07.M)
  0.29 - 5.8 psi / 0.02 - 0.4 bar (DS07.S)
Max Temperature: 248°F/120°C
  (320°F/160°C on request)
Materials:
  Measuring glass: Duran 50
  Housing: anodized aluminium
  O-rings: Perbunan
               (optionally: Viton, EPDM)
Electrical Connections: plug acc. to DIN 43650
               (optionally: 1m cable connection) Accuracy: ±10% f.s.
Analog Output: see model DSxx-A in section
   "accessory"