VHS-...GAOA | flow transducer/screw volumeter
Product.Nr.: VHS-...GAOA
Manufacturer: Senseca (ehemals Honsberg)
Product variations
product description
Construction type: connection material AL, anodised, 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. 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. 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 optionally be connected as a PNP or an NPN output, and emits a frequency proportional to the flow rate.
The A / B output consists of two push-pull outputs. Their signals are phase-shifted by 90°. Thus, it is possible to determine the direction of flow by using the bidirectionally driven sensor.
The 2-wire model represents the pulses by two different currents and has the advantage of reduced wiring effort. Alternatively, it is possible to use add-on electronics with signal processing of the the series OMNI, FLEX and LABO.
The devices' bodies are made of aluminium and the connections either of aluminium (PN 160) or steel (PN 350). Optionally, both connection types can be fitted with SAE flanges, which simplify the installation in the pipeline and result in both cases in a pressure resistance of PN 350.
Specifications:
Option encapsulated ball bearings upon request!
With integrated evaluation electronic available in the following construction types:
LABO-VHS: evaluation electronic with analog output or switching function incl.
FLEX-VHS: evaluation electronic with analog output and switching function incl.
OMNI-VHS: evaluation electronic with analog output, switching function and display incl.
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. 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. 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 optionally be connected as a PNP or an NPN output, and emits a frequency proportional to the flow rate.
The A / B output consists of two push-pull outputs. Their signals are phase-shifted by 90°. Thus, it is possible to determine the direction of flow by using the bidirectionally driven sensor.
The 2-wire model represents the pulses by two different currents and has the advantage of reduced wiring effort. Alternatively, it is possible to use add-on electronics with signal processing of the the series OMNI, FLEX and LABO.
The devices' bodies are made of aluminium and the connections either of aluminium (PN 160) or steel (PN 350). Optionally, both connection types can be fitted with SAE flanges, which simplify the installation in the pipeline and result in both cases in a pressure resistance of PN 350.
- Measuring and 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)
- Linear frequency output (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, AL anodised |
| Basic data: | PN 160 bar, temperature of medium -25°C to +80°C, (150°C upon request) |
| Electrical data: | 3-wire or A / B output: supply voltage 10 V DC to 30 V DC, current consumption approx. 20 mA without load 2-wire: supply voltage 4.5 V DC to 24 V DC |
Option encapsulated ball bearings upon request!
With integrated evaluation electronic available in the following construction types:
LABO-VHS: evaluation electronic with analog output or switching function incl.
FLEX-VHS: evaluation electronic with analog output and switching function incl.
OMNI-VHS: evaluation electronic with analog output, switching function and display incl.
Downloads
data sheet English (0.35 MB)
data sheet German (0.34 MB)
