SS · Suspended Solids / MLSSSensor

M200 Suspended Solids Digital Sensor

Near-IR light scattering measures suspended solids and MLSS up to 30,000 mg/L with +/-5%FS accuracy. IP68 protection, submersion or flow-through installation, and RS485 output support aeration-tank and return-sludge control in wastewater plants.

Suspended Solids SS Sensor
30000 mg/L
Max Range
0.01 %
Resolution
±5 %FS
Measurement Accuracy
IP68
Full protection · RS485
Features

Measure MLSS across the process, from aeration tank to thickener

Near-IR scattering limits color interference, while an optional self-cleaning wiper helps maintain stable readings from low-turbidity effluent to high-concentration return sludge, reducing manual sampling.

Advanced Circuitry

High StabilityOptical Circuit,Near-InfraredScattered SignalHigh-precision Acquisition,Anti-interference.

Easy Installation

Submersion and flow-through options with a standard cable for direct installation in aeration tanks.

Industrial-grade Protection

IP68 protection with an ABS+POM housing that resists fouling and corrosion.

Fast Response

Fast optical response, optional self-cleaning wiper, and low drift during long-term operation.

Model Selection

SS Sensor Model Overview

The series supports multiple installation methods and water types. Filter by installation method, then add a model to your selection list or contact our engineers for verification.

M200-SS-01
RS485 Digital
Submersion - Aeration Tank Type
Range0–4000 mg/L
Measurement PrincipleNear-Infrared Scattering
Temp. Range-5–45°C
Housing MaterialABS+POM
Aeration TankBiological TankMLSS
M200-SS-02
RS485 Digital
Submersion · Pollution
Range0–30000 mg/L
Measurement PrincipleNear-Infrared Scattering
Temp. Range-5–45°C
Housing MaterialABS+POM
Pollution ThickenerRAS
M200-SS-03
RS485 Digital
Flow-through · Effluent
Range0–4000 NTU
Measurement PrincipleNear-Infrared Scattering
Temp. Range-5–45°C
Housing MaterialABS+POM
Effluent monitoringdischarge outletreclaimed water
M200-SS-04
4-20mA Analog
Submersion · Analog Output
Range0–30000 mg/L
Measurement PrincipleNear-Infrared Scattering
Temp. Range-5–45°C
Housing MaterialABS+POM
Pollution ThickeningDewatering FeedSludge Well
M200-SS-05
RS485 Digital
Submersion - With Self-cleaning
Range0–30 g/L
Measurement PrincipleNear-Infrared Scattering
Temp. Range-5–45°C
Housing MaterialABS+POM
Aeration TankInfluentAquaculture
M200-SS-06
RS485 Digital
Flow-through - High Range
Range0–30000 mg/L
Measurement PrincipleNear-Infrared Scattering
Temp. Range-5–45°C
Housing MaterialABS+POM
Pollution pipelineDewateringThickening
Specifications

Complete Specifications

General specifications for the series. Range, housing, and output vary by model and are confirmed during selection.

Measured Parameter
Suspended Solids / MLSS(SS / MLSS)
Measurement Principle
Near-Infrared 90° Scattering(Optical)
Measuring Range
0–4000 NTU / 0–30000 mg/L(stepped)
Resolution
0.01%
Measurement Accuracy
±5.0%FS
Temp. Measurement range
-5–45°C
Temp. Compensation
None
Pressure Range
0.6 MPa
Housing Material
ABS+POM plastic
Process Connection
G3/4
Cable Length
Standard 5m (Customizable)
Protection Rating
IP68
Cleaning Method
self-cleaning wiper(Optional)
Electrical Connection
RS485 (MODBUS-RTU) or 4-20mA Analog
Installation
Submersion / Flow-through
Warranty
1 year
Applications

Suitable Water Types

Suspended solids and MLSS are key process-control parameters in biological wastewater treatment, directly affecting aeration and sludge return. Select the concentration range and installation for your application below.

Wastewater Biological

5
Aeration TankBiological TankMLSS Pollution Secondary Clarifier

Pollution

4
Pollution ThickeningDewatering FeedSludge WellThickener

Water supply andEffluent

3
Effluent monitoringdischarge outletreclaimed water reuse

Environment and aquaculture

3
Surface WaterRiver MonitoringAquaculture
Get a recommendation

Tell us your process conditions and installation, and we will recommend the right SS model

Send us the MLSS range, monitoring point, and installation conditions. Our engineers will recommend the range, housing, cleaning option, and installation, then configure the SS probe for plug-and-play connection to an 8-channel monitor.