Helical screw flow transmitter LABO-VHS-S

for oilhigh-precisionelectronic

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 non-abrasive 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, every pulse corresponds to a specific measured volume. There are no magnets in the flow space. The LABO-xxx-s electronics fitted to the device make available an electronic switching output (push-pull) with adjustable characteristics (minimum/maximum) and hysteresis, which responds when an adjustable limit is fallen short of or exceeded. If desired, the switching value can be set to the currently existing flow using "teaching". Models with analog or pulse output are also available (see separate data sheets). ● Monitors viscous media (oil) 1.4..2500 l/min ● Connection G 1..G 21/2 ● Very low dependence on viscosity ● Can be used up to 40,000 mm²/s (cSt) ● Versatile configurable limit switch (push-pull) ● Light and compact device (aluminium housing) ● Operation and measurement possible with forward and reverse flow ● For cost-sensitive applications