LABO-S: evaluation electronic with switching output

Screw volumeter

Construction type: connection material steel, without additional flange

General information:

The flow transmitter VHS measures the flow according to the volumetric principle and is suitable for fluid, viscous, lubricating media (e.g. lubricating oil). If the material of the VHS is selected appropriately also aqueous fluids such as soaps, pasts and emulsions with non-abrasive character can be measured, as long as they have sufficient lubricity. Because of the volumetric operation, the devices are 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. Each puls corresponds to a specific measured volume. There are no magnets in the flow space.

The LABO electronics provide an electronic switching output (push-pull) with adjustable characteristics (minimum/maximum) and hysteresis, which responds when an adjustable limit value is fallen below or exceeded. If desired, the switching value can be set to the currently existing flow using "teach-in". Construction types with analog or pulse output are also available.

Monitoring of viscous media (oil) 1.4 l/min to 2,500 l/min
Connection G 1 to G 2 1/2
Very low dependence on viscosity
Can be used up to 40,000 mm²/s (cSt)
Versatilely configurable limit switch (push-pull)
Light and compact device (aluminium housing)
Operation and measurement possible with forward and reverse flow
For cost-sensitive applications

Specifications:

Appliance:	flow, measurement, control
Medium:	oil or non-aggressive self-lubricating fluids
Total measuring range:	1.4 l/min to 2,500 l/min oil
Connection:	G 1 to G 2 1/2 internal thread, steel
Basic data:	PN 350 bar, temperature of medium -25°C to +80°C, (150°C upon request)
Electrical data:	supply voltage 10 V DC to 30 V DC power consumption <1 W (for no-load output)