Analyser measures suspended solids

Electro-Chemical Devices says the Triton TR8 Analyser is precise, reliable and low-maintenance.

Accurate measurement of suspended solids is critical to maintaining the proper level of activated sludge in an aeration basin, and adjustments to the return and removal rates of the activated sludge can improve the efficiency of the basin in reducing the chemical oxygen demand (COD) and biochemical oxygen demand (BOD) of the mixed liquor. The TR8 is available with immersion fittings for service in the aeration basin or insertion fittings for the return and waste activated sludge lines. It can measure suspended solids or turbidity at levels greater than 500 NTU, with output available in multiple units: 0.00-9999 FNU, 0.00-9999 ppm, 0-300g/l and 0-200%. The TR8 TA sensor features an error rate of less than 5% of reading with repeatability greater than 1% of reading.

The Triton TR8’s sensor features a multi-beam optical assembly. The first light beam is a reference detector that compensates for changes in the LED light source caused by aging or other variables. The second light beam detects the short path length, which is best for high concentration measurement. The third light beam measures the longer path length, which is best for lower concentrations.

The analyser also featured electronics which constantly adjust suspended solids and turbidity signal readings and there is a digital filter helps to suppress potentially interfering signals while self-monitoring diagnostics assure high reliability. 

The Triton TR8’s sensor assembly relies on a long-life near infrared LED light source (880 nm), and the 90-degree scattered light method in accordance with ISO 7027/EN 27027. The sensor is factory calibrated in formazine, FNU (formazine nephelometric units), and is plug-and-play ready for applications. Two non-volatile memory banks are also available onboard to store user-initiated calibration data.

The analyser ‘s sensor has been developed for rugged water treatment environments and designed to operate at ambient temperatures from -5 to 50°C (20-120°F). It can withstand pressures up to a maximum of 6 bar at 25°C and 1 bar at 50°C.