Analogue Output Automatic Sludge Blanket Level Monitor Model: UP/W204763 equipments

The W204763 is a fully automatic sludge blanket level detector primarily designed for the water and waste
water industry but could be applied to other types of process. It utilises a servo-driven sensor which
continually tracks the settled interface and produces a 4-20 mA output which is proportional to the depth of
the blanket.
The W204763 is supplied with either a Infrared or Soli-Tech 20 sensor. The use of infrared attenuation as the
principle of operation for the sensor allows Partech to ensure sufficient sensitivity to monitor sludge blankets
in a wide variety of applications. It should be noted that sensor selection can be site dependent, Partech are
happy to provide full support in the selection of the correct sensor.
The sensor will normally be in the area of the tank just above the sludge and will therefore be kept away from
the worst of the fouling that can occur in the treatment of either potable or dirty water.
Provision must be made for transmission of the output signal to the control system; this is normally possible via
spare slip rings. Where this is not possible a radio telemetry option is available, allowing transmission directly to
the control system without the need for installation of cables.
Physical
Weight 18 kg
Dimensions (h x w x d) 490 x 490 x 290 mm
Enclosure Rating IP55 Outer Enclosure with IP65 Electronics Housing
Enclosure Material GRP Outer with Polycarbonate Inner
Cable Entries 3 x PG11 (cable 5 to 10 mm)
Cable Size Max Conductor Cross Section 2.5 mm2
Environmental Data
Operating Temperature 0 to 50?C
Storage Temperature 0 to 50?C
Location Indoor or Outdoor
Power Supply
Voltage 115/230 VAC +10/-15% Field Selectable
Power Consumption 25VA
Fuse 1 A
Outputs and User Interface
Analogue Output 4-20 mA, maximum load resistance 600 ohm
Relay Output 1, this alarms at 0 and 100% only and is not adjustable
Contacts Contact Closure
Rating 0.5A @ 100 VDC
Local Annunciation 6 LEDs on Main CCA
Measurement Details
Response Time 5 second delay, tracks blanket at 1 metre per minute
Accuracy Typically +/-5%
Resolution +/- 100 mm
Accuracy and resolution statements are dependent on
the settling characteristics of the solids and can vary
during operation of the plant.
Sensor Selection

Display 3 Digit, 7 Segment LED Display of 0-100%
Setup Potentiometer and Push Buttons on main CCA
Units of Measurement %age Depth
Mounting
Type Requires bracket to mount on Handrail
Bracket/Plate Part Number 101170 for attachment to handrail