Zetasizer WT
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Description
Malvern Panalytical
Zetasizer WT On-line zeta potential analyzer for water treatment processes The Zetasizer WT is a fully automated system that delivers lab quality on-line zeta potential measurements. This enables real-time monitoring of flocculation process performance and efficient charge neutralization. On-line charge measurements you can trust are finally here!
Key Differences
The Zetasizer WT combines Malvern Panalytical’s industry leading Electrophoretic Light Scattering technology with two decades of expertise with in-process measurements to produce a dedicated on-line zeta potential analyzer for water treatment plants.
No more guess work – accurate and reliable results in [mV] provide a clear range for dosing control.
Respond to changes in raw water before they cause filtration problems!
Reduce chemical use to optimum for forming a stable floc. Overdose no more!
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Completely automated zeta potential analysis with results in minutes.
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Results sent to SCADA via OPC, Modbus or 4-20mA
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Minimal maintenance
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Easy measurement of grab samples on the same system.
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HMI for local control and setup
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On board computer for autonomous operation
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Sample flow and temperature sensing
How it works
The Zetasizer WT connects to a sample stream coming from the plant after coagulants have been added and mixed into the water. The system uses a pump to flow a sample through the analyzer`s flow cell where zeta potential measurements are made. Sample is then pumped into waste or returned back into the process and replaced with a fresh sample in a continuous, automatic cycle.
Automation and analysis is controlled by an on-board industrial computer running Malvern Panalytical Link II software.
Measurement results are displayed on a local HMI screen as well as exported into plant SCADA via OPC, Modbus TCP/IP or wired 4-20mA connections.
Results are used by treatment plant operators or a plant control system to adjust coagulant dose required to keep zeta potential in a pre-determined range – typically between zero and a slight negative charge.
Zetasizer WT also allows easy measurement of grab samples from other areas in the process, effectively doubling as a laboratory system.
Technical Specification
Sample requirement
Sample flow rate: 100 - 350 LPH (fast loop)
Sample flow rate: 0.5 - 2 LPM (measurement)
System
Measurement type: Zeta potential
Measurement principle: Laser Doppler micro-electrophoresis
Measurement
Result output frequency: 3 minutes typical, programmable
Operation: 24hr continuous
Range of zeta potential measurement: +/- 500 mV (+/- 90 mV on HMI interface)
General
Size range: 3.8 nm to 100µm
Enclosure rating: IP54, indoor use. Limited capability to NEMA 4X
Power: 90 - 132 VAC, 180 - 264 VAC, 50 - 60 Hz, 6 A
Dimensions (W, D, H): 855 x 686 x 1720mm
Weight: 160 Kg
Compressed air purge: 1.5LPM, 6-10 bar, ISO 8573-1:2010 [0.7.2] (optional)
Operating environment
Temperature range: 0°C to 40°C
Humidity: 5-95% non-condensing
Maximum sample pressure: 6 bar
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