Gear Volume Sensor SIKA VZAL

Type: VZ004ALV31K00S
Measuring range: 0.02 ... 4 l/min
ball-bearing
Resolution: 25,000 pulses / liter
Measuring accuracy: ± 2% (from 20 mm² / s)
Output frequency signal
1 measuring channel
electrical connection via plug
Max. Operating pressure 200 bar
Temperature range: -10 ... + 80 degrees C
Housing material aluminum (gold colored anodized)
Sealing material FKM
Supply voltage: 12 ... 30 V DC
G 1/4 internal thread
without preamplifier for connection
for local display TD 8250   

The SIKA gear wheel volume sensors are suitable for the detection of high and variable viscosity flow rates, i.a. in the following fields of application:
- Consumption measurement
- Control of filling operations
- Dosing of oils and chemicals
- Capture of paints / varnishes

A very precisely fitted pair of gears within the housing forms the measuring mechanism. The inflowing medium sets the gear pair in rotation. The rotational movement is scanned contactless by sensors. Since every single tooth generates a pulse, a very high resolution results. Thus, even the smallest volumes can be exactly measured or metered.

To obtain a 2-channel flow-proportional frequency signal, two sensors are inserted in the measuring unit (offset by ¼ tooth pitch). With appropriate further processing of the signal, one obtains a further increased resolution and the possibility of detecting the direction of flow.

The maximum pressure drop should not exceed 16 bar. This limits the measuring range for highly viscous media (see pressure loss diagrams).