Measurement of suspended solids concentration in municipal and industrial wastewater treatment processes.
● Feed water field  
sedimentation tank
● Sewage treatment plant
Water inlet, aeration tank, sludge, the primary settling tank, two tank, sludge thickener sludge dewatering etc.
● Paper mill
Pulp concentration
● Coal washing plant   
Sedimentation tank, concentrated pool
● Power
Mortar sedimentation tank, power plant desulfurization lime slurry
● Other industries
PCB industry sandblasting liquid, biogas pool (biogas

The infrared light emitted by the light source is irradiated on the receiving element through the suspended substance. Only a small fraction of the light passes through the absorption, reflection and scattering of the object. The relationship between light transmittance and suspended solids content in the sewage to be measured, can be used to describe the law of Lambert - Bill, lnS=C-K

* MLSS, MLSS said the suspended solid content,K and C are constants. Therefore, the concentration of suspended matter can be calculated by measuring the transmissivity of transmitted light. Single beam measurement method of optical window is easily affected by dirt and other factors. Tengine innovation patent multi beam automatic compensation method by two transmitters and two receivers to produce a series of optical path, a group of data, through the comparison of these figures can automatically eliminate light window fouling, temperature changes, aging effect of stable and accurate measurement.

● Innovative multi beam mutual compensation technology to eliminate the measurement error caused by light window fouling;
● The effect of ambient light on the measured data by optical band-pass filter and modulated excitation;
● Digital sensor, with strong anti-interference ability and stability, sensor cable length up to several hundred meters;
● Sensor plug and play, automatic identification, support dual channel input;
● The meter can provide isolated RS232 digital interface and isolated RS485 digital interface to support standard Modbus ASCII and Modbus RTU protocol;
● Support two languages: Chinese and English;
● Relay output programmable: any relay can be set to high alarm, low alarm, timer mode;
● With a history of automatic data storage, storage, query 10 years of historical data

Measurement performance
● Measuring range: depending on the type of media
Activated sludge: 0~25g/L,Silicon dioxide:0~400g/L
● Unit of measurement: g/L,mg/L,ppm,% Optional
● Resolution: 0.01g/L,1mg/L,1ppm,0.01%
● Accuracy: ±1%FS(Depending on media and homogeneity)
● Reproducibility: ±1%FS
● Response time: Less than 3 seconds, can be adjusted
● Calibration: factory calibration, on-site calibration
● Display: LCD liquid crystal display date, time, measurement, historical trend line, Chinese and English menu options
● Data storage: automatic storage function, power failure data protection, storage query 10 years of historical data
● Site settings: completed by the transmitter button
Output
● Analog output: isolation 0/4~20mA, maximum load 750, fault state output current optional
● Relay output: 3 programmable relays can be set to alarm function and timing function
● Relay capacity: 2A, 250VAC
● Digital interface: MODBUS RS232/RS485, Profibus DP optional
Power supply
● AC power supply: 85~265VAC,50Hz/60Hz
● DC power supply: 24VDC±10%
Physical properties
● Transmitter size: 270×205×100mm
● Sensor size: Φ45×112mm
● Material: transmitter: ABS+PC sensor: 316L stainless steel
● Connection: 1 inch taper external thread
Environmental performance
● Protection level: transmitter: IP65 sensor: IP68
● Working temperature: transducer: -20℃ ~60℃ of 0 degrees’ centigrade temperature: 0℃~60℃
● Working pressure: maximum 6Bar
● Cleaning air pressure: 0.7Bar~3Bar