More informations

The flow meter and switch model DS08 works according to a modified variable area principle. The float is guided in a cylin­drical measuring tube by means of a spring. The flowing medium moves the float in the flow direction.

An externally mounted pointer indicator is magnetically cou­pled to the float and thus, following the float position, 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.

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 flow meters.

Typical applications

The variable area flow meter and switch model DS08 is used for measuring and monitoring the flow of viscous liquids, i. e. in central lubricating systems, any other lubricating circuitry, hydraulics, transformer oils etc.