SoliSense® - Suspended Solids Monitor

• From 2 NTU to 8% Solids
• Displays in NTU, mg/l, g/l or % solids – flexible
• Auto-clean optical sensor – months without maintenance
• Stable and reliable – excellent process control
• Suitable for all potable, waste and process waters
• Up to 12 months between maintenance
• Up to 12 months between calibration

The SoliSense® suspended solids meter is available with different controllers giving you the same great performance with different communication, display, and control options. With the SoliSense® range of online suspended solids meters, you get everything that you need – and nothing that you don’t, without sacrificing the quality of measurement.

The use of a single sensor to robustly and accurately measure a large dynamic range of suspended solids allows for:

• Less spares – more commonality across a single or multiple sites
• No requirement to know the range prior to specifying – easier purchasing
• One online suspended solids meter can be:
  • Mutli-liquor suspended solids (MLSS) meter
  • Total suspended solids (TSS) meter
  • Total suspended solids meter
  • Effluent monitor
  • Inlet monitor
  • In process’ suspended solids meter

The sensor determines the suspended solids concentration or the turbidity in the water using a a measurement of the backscattered light. The SoliSense® sensor uses lifetime based optical technology to provide an extremely stable, accurate, low-maintenance sensor, with no moving parts and no consumables.

Each sensot is fitted with a light source and two detectors for making the measurements. Having two detectors, positioned at different distances from the light source, allows the sensor to be used over a wide range of suspended solids concentrations. The light source is a long life infra-red LED emitter (providing for 15 years working life). The detectors are matched photodiodes. The detectors in the SoliSense® are positioned to detect backscattered light . By doing this, the sensor can be used to detect low and high concentrations of solids. The SoliSense® uses Pi's novel measurement technique that automatically takes readings at four different light levels and uses the gradient between the four readings to produce the sensor output. This configuration allows accurate and reliable measurements of suspended solids concentrations and turbidity to be made.

Calibration of the SoliSense® for turbidity measurements or measurements of samples with low concentrations of solids is very easy only requiring a single calibration sample. This sample can either be a reading from another method or a suitable standard. The analyser calibrates the sensor by a procedure that reduces the light output through four stages, taking measurements at each. This process provides an accureate and reliable zero and span without the requirement to use a '0' NTU/ solids sample.

Calibration of the SoliSense® for the measurement of samples with high concentrations of solids uses a multi-point procedure. Up to 5 calibration points can be used to give an accurate performance across a wide range of sample concentrations.

The SoliSense® suspended solids meter has been designed specifically to be suitable for wastewater applications.

• Inlet monitoring (turbidity 2-4000 NTU)
• Effluent monitoring (suspended solids 0-1000 mg/l)

Traditional monitoring applications where Pi's total suspended solids meters are particularly suited:

• Return activated sludge
• Mixed liquor suspended solids
• Waste activated sludge
• Thickened sludge
• Centrate
• Filtrate
• Wastewater effluent
• Wastewater influent