- High precision and linearity
- For oils and other viscous media
- Ranges from 1.5 to 2500 l/min
- Connection G 1..G 21 /2
- Very low dependence on viscosity
- Can be used up to 40,000 mm²/s (cSt)
- Linear frequency output (push-pull)
- Light and compact device (aluminium housing)
- Operation and measurement possible with forwards and reverse flow
- For cost-sensitive applications
The VHS flow transmitter measures the flow using the volumetric principle, and is suitable for fluid, viscous, lubricant media (e.g. lubricating oil). If the material for the VHS is selected appropriately, aqueous fluids such as soaps, pastes, and emulsions with nonabrasive characteristics can also be measured, as long as they have sufficient lubricity. Because of the volumetric functioning principle, the device is almost completely independent of viscosity. The VHS system consists of two interlacing screws which run in opposite directions, driven by the flowing medium. A magnetically pre-tensioned Hall sensor positioned outside the flow space detects the screw flanks, and creates a frequency signal proportional to the flow. Here, two pulses correspond to one revolution of the screws, and therefore to a specific measured volume (see data table) There are no magnets in the flow space. A push-pull transistor output, an A / B output or a two wire output are available as signal output. The push-pull output can as desired be switched as a PNP or an NPN output, and emits a frequency proportional to the flow rate.
