Sensor Selection
The ASLD 2200 is supplied with a Soli-Tech 20 sensor; the correct sensor should have been
selected before purchase. If you are in any doubt about the sensor that has been supplied please
contact Partech.
Sensor replacement in the field is easy to carry out; the table below indicates the normal
application of the each of the four sensor ranges.
Sensor Ranges
Soli-Tech 20 range 0-200
This sensor is normally used for Suspended Solids measurements and is not normally applied to
Sludge Blanket measurement. The sensor should only be used if the sludge is very ‘light’ with
very clear supernatant.
Equivalent IR Series Sensor: IR100
Soli-Tech 20 range 0-1500
This is the most commonly used sensor and is suitable for use on final settlement tanks in
sewage treatment applications and clarifiers in water treatment works.
Equivalent IR Series Sensor: IR15
Soli-Tech 20 range 0-10000
This sensor is also regularly used for sludge blanket detection and is normally used for primary
settlement in sewage treatment and sludge thickeners in water treatment.
Equivalent IR Series Sensor: IR15
Soli-Tech 20 range 0-30000
This sensor should only be applied on sludge thickeners in sewage treatment plants.
Equivalent IR Series Sensor: IR8
Controls and Settings
Page 5
