DO · Dissolved Oxygen Sensor

M200 DO Digital Sensor

Choose membrane or fluorescence measurement for dissolved oxygen from 0.00 to 20.00 mg/L, with +/-2%FS accuracy and automatic temperature compensation. IP68 protection, flexible installation, and RS485 output support wastewater aeration and aquaculture oxygenation control.

Dissolved Oxygen Sensor
20 mg/L
Max Range
0.01 mg/L
Resolution
±2 %FS
Measurement Accuracy
IP68
Full protection · RS485
Features

Reliable dissolved oxygen measurement for aeration and aquaculture control

Membrane and fluorescence principles are available for different operating conditions. The IP68 enclosure and electrode protection sleeve suit aeration tanks and demanding aquaculture environments.

Advanced Circuitry

high-stability measurement circuit,High-precision DO signal acquisition, anti-electromagnetic interference.

Easy Installation

Submersion / flow-through multiple methods, standard 5m cable, with electrode protection sleeve.

Industrial-grade Protection

IP68 protection with ABS, PC and stainless-steel housing options.

Fast Response

Reaches 90% of final value within 90 seconds, auto temperature compensation, stable readings.

Model Selection

DO 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-DO-01
RS485 Digital
Flow-through · Membrane MethodGeneral
Range0–20 mg/L
Measurement PrincipleMembrane Method
Temp. Range0–60°C
Housing MaterialABS
WastewaterAeration TankMunicipal
M200-DO-02
RS485 Digital
Flow-through · Membrane Methodresistant
Range0–20 mg/L
Measurement PrincipleMembrane Method
Temp. Range0–60°C
Housing MaterialPC+Stainless Steel
WastewaterCirculating WaterIndustrial Processes
M200-DO-03
RS485 Digital
Submersion · Fluorescence
Range0–20 mg/L
Measurement PrincipleFluorescence
Temp. Range0–60°C
Housing MaterialPOM+Stainless Steel
AquacultureRiver MonitoringSurface Water
M200-DO-04
4-20mA Analog
Submersion · Membrane MethodPressure-resistant
Range0–20 mg/L
Measurement PrincipleMembrane Method
Temp. Range0–60°C
Housing MaterialPOM+Stainless Steel
Deep WellReservoirHigh Lift
M200-DO-05
RS485 Digital
Flow-through · FluorescenceMaintenance-free
Range0–20 mg/L
Measurement PrincipleFluorescence
Temp. Range0–60°C
Housing MaterialABS
Tap WaterSecondary SupplyCirculating Water
M200-DO-06
RS485 Digital
Submersion · AquacultureDedicated
Range0–20 mg/L
Measurement PrincipleFluorescence
Temp. Range0–50°C
Housing MaterialPOM+Stainless Steel
AquacultureOxygenation ControlPond
Specifications

Complete Specifications

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

Measured Parameter
Dissolved Oxygen(DO)
Measuring Range
0.00–20.00 mg/L(ppm)
Measurement Principle
Membrane Method / Fluorescence(By Model)
Calibration Method
zero Calibration, Calibration
Measurement Accuracy
±2%FS
Temp. Compensation
Automatic
temperatureSensor
NTC22K(Optional PT100 / PT1000)
Temp. Measurement range
0.0–60.0°C
Response Time
Reaches 90% of final value within 90 seconds
Flow Velocity
Minimum 0.02 m/s
Pressure Range
0–2 bar
Housing Material
ABS / PC+Stainless Steel / POM+Stainless Steel(By Model)
Cable Length
Standard 5m (Customizable)
Protection Rating
IP68
Electrical Connection
RS485 (MODBUS-RTU) or 4-20mA Analog
Installation
Submersion / Flow-through
Electrode Protection Sleeve
Yes
Warranty
1 year
Applications

Suitable Water Types

Dissolved oxygen is a core control parameter in biological wastewater treatment and aquaculture. Online monitoring helps optimize aeration and oxygenation. Select the measurement principle and housing for your water type below.

Municipal wastewater

5
Wastewater TreatmentAeration ControlWastewater TreatmentMBRSBR

Aquaculture

4
Pond aquacultureintensive aquacultureOxygenation ControlCirculating-water aquaculture

Industrial Processes

4
PowerChemicalPharmaceuticalFood

Environment & Circulation

4
Surface WaterRiver MonitoringCirculating WaterLandscape Water
Get a recommendation

Tell us your water type and range, and we will recommend the right dissolved oxygen model

Send us the dissolved oxygen range, water type, and installation conditions. Our engineers will recommend the measurement principle, housing, output, and installation, then configure the DO probe for plug-and-play connection to an 8-channel monitor.