Differential water level measurement for control of screen raking
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Coarse and fine screens
Differential water level measurement for control of screen raking
Application
Mechanical cleaning removes larger, floating and entrainedmatter from the intake rakes, screens or sieves. This protects the following process stages from buildup, clogging and abrasion. Solids with diameters greater than 25 mm are trapped in the coarse screens, sometimes finer secondary screens remove smaller residual materials. The screenings are processed in a press and then disposed of.
Recommended Products
VEGAPULS WL 61
The difference between the water level either side of the screen indicates the degree of contamination of the screen and activates the rake or cleaning process
- Reliable, maintenance-free measurement
- Simple installation thanks to contactless measuring principle
- Unaffected by foam or condensation
Measuring range - Distance
15 m
Process temperature
-40 ... 80 °C
Process pressure
-1 ... 2 bar
Hydrostatic level measurement as an alternative: VEGAWELL 52
The difference between the water level in front of and behind the screen indicates the degree of contamination of the screen.
- Wear-free measurement due to ceramic measuring cell
- High accuracy and repeatability via small pressure ranges
- High long-term stability
Measuring range - Pressure
0 ... 60 bar
Process temperature
-20 ... 80 °C
Process pressure
-
VEGAMET 625
Signal conditioning device and display instrument for two level sensors
- Highly versatile use through three scalable current outputs for control of displays and downstream systems, such as PLC or SCADA
- Simple integration into Intranet/Extranet through integrated web server
- Simple data logging and history retrieval with integrated memory
Protection rating
IP 20/IP 30
Input
2 x 4 … 20 mA/HART sensor input with transmitter power supply (only HART capable sensors)
Output
1 x fail safe relay
1 x Ethernet
1 x RS232
3 x operating relay
3 x 0/4 … 20 mA current output
Inquiry - Differential water level measurement for control of screen raking
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Water and wastewater
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