The 8100 and 8200 monitors provide an exceptionally simple and reliable method of detecting the sludge blanket level in clarifiers and settlement tanks in wastewater, drinking water and industrial effluent treatment.
Control of the sludge blanket level is essential to ensure discharge consent compliance and efficient control of the treatment process. If the sludge blanket in a settlement tank is allowed to rise close to the surface there is a danger that solids will leave the tank and contaminate the next process stage or be discharged into the water course. Alternatively, if the sludge blanket is not allowed to stabilise, form a blanket or is pumped out too frequently, the settlement process does not take place at all and solids will remain in suspension.
Our infrared sensors are ideally suited to monitoring the top of the sludge/water interface ensuring early detection of any rising sludge that represents a threat to the treatment process and effluent quality.
The 8100 Monitor is suitable for mounting outdoors on the bridge of settlement tanks, as the enclosure is IP65 rated and no outer enclosure is required, although outer protection is often preferable to avoid degradation of the enclosure due to environmental conditions. 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.
The 8200 Monitor is a two channel version of the monitor providing the option of alarming at two positions in a tank or on two tanks that are located close together.
Partech offer a selection of sensors that are for use in conjunction with our range of Sludge Blanket monitoring instruments. All the sensors use infrared attenuation as their operating principle, this makes them sufficiently sensitive for use on thin water treatment sludges as well as the more usual sewage treatment applications. When monitoring the Sludge Blanket Level in settlement tanks it is important to ensure that the sensor is sensitive enough to detect low density solids before ‘carry-over’ to the next process stage occurs, ensuring that potential pollution events are highlighted prior to occurrence. At the same time the sensor should not be ‘blinded’ by solids in the supernatant. Advice on sensor selection is included in the brochure and our engineers are available to provide further advice if required.
|Dimensions (hxwxd)||160 x 195 x 105 mm|
|Cable Entry||4 x M20 (cable 5 to 10 mm)|
|Cable Core Size||Max Conductor Size 2.5 mm²|
|Power Supply||100 to 240VAC 50/60 Hz
9 to 36VDC option vailable
|Power Rating||8 W|
|Monitor: -20 to 60ºC
|Local Annunciation||Green LED for Normal
Red LED for Blanket Alarm
Orange LED for Fault
|Adjustment||5 - 95% of Sensor Range|
|Response Time||1 to 90 Seconds|
|Number||2, 1 Blanket High, 1 System Fault|
|Rating||5 A @ 230VAC, [email protected]|
The 8100 and 8200 Monitors are offered with a choice of sensors, the details below give information about the specifications of the sensors.
|Principal of Operation||Light Attenuation|
|Wavelength||960 nm Infrared|
|Accuracy||+/- 1 cm of interface
Accuracy will depend on the settling characteristics of the solids and can vary during operation of the plant
|Response Time||0.5 seconds|
|Flowrate||Not affected by flowrate|
|Pressure Rating||10 mWC|
|Weight||0.35 kg (inc 10 metres of cable)|
|Enclosure Material||Moulded Epoxy Resin|
|Cable Length||10 metres standard, 100 metres maximum|
|Service Requirement||No routine servicing
The sensor will require manual cleaning, the frequency is application dependent
|IR100||Range: 0-200 mg/l
Optical Path: 100 mm
Special Application Only
|IR40||Range: 0-1,500 mg/l
Optical Path: 40 mm
Wastewater Treatment - Final Settlement and Humus Tanks
Drinking Water Treatment - Clarifers
|IR15||Range: 0-10,000 mg/l
Optical Path: 15 mm
Wastewater Treatment - Primary Settlement Tanks
Drinking Water Treatment - Picket Fence Thickeners
|IR8||Range: 0-30,000 mg/l
Optical Path: 8 mm
Wastewater Treatment - Picket Fence Thickeners
|163600||8100 Monitor - Single Channel Sludge Level Detector (85 to 264VAC, 1 x Alarm Relay & 1 Fault Relay)|
|223644||8100 Monitor - Single Channel Sludge Level Detector (9 to 36VDC, 2 x Alarm Relay & 1 Fault Relay)|
|163610||8200 Monitor - Dual Channel Sludge Level Detector (85 to 264VAC, 2 x Alarm Relay & 1 Fault Relay)|
|223646||8200 Monitor - Dual Channel Sludge Level Detector (9 to 36VDC, 2 x Alarm Relay & 1 Fault Relay)|
|226370||FlexTech Monitor Bracket Assembly (7200/8100/8200 Monitor, Handrail|
|102200||IR100 Sensor - 8100/8200/7200 (Cable Length: 10 metres) Range 0-200 mg/l|
|101900||IR40 Sensor - 8100/8200/7200 (Cable Length: 10 metres) Range 0-1,500 mg/l|
|101600||IR15 Sensor - 8100/8200/7200 (Cable Length: 10 metres) Range 0-10,000 mg/l|
|148120||IR8 Sensor - 8100/8200/7200 (Cable Length: 10 metres) Range 0-30,000 mg/l|
|171290||Mounting Bracket - IR, Soli-Tech 20v2 (Handrail)|