pHCombined Electrode
pH Value
pH Value
Range0.00–14.00 pH
Resolution0.01 pH
Accuracy±0.2 pH
IP68 · Immersion/Flow · 304L·POM · Φ30mm
Wall-mounted Multi-parameter Water Quality Online Monitor · Multi-Parameter Monitor
One wall-mounted unit,
One wall-mounted unit,
connect every parameter you need
MicroCONTROL-201B~205B — one unit with 8 analog channels for flexible single/dual/multi-parameter combinations. Sensors are automatically recognized when connected, no per-unit configuration needed. Five preset solutions (201B~205B) from factory, covering drinking water, surface water, aquaculture and swimming pools; RS-485 / Modbus direct connection to upper platform, 24-hour real-time monitoring with automatic over-limit alarm.
8Channels Free Combination
5Field Preset Solutions
7"Touchscreen Display
RS-485Modbus
IP54Outdoor Protection
Field Presets / Field Presets
Key Highlights
One unit handles multi-parameter monitoring
Three things to check when selecting — enough channels, compatible protocols, low maintenance. 8 channels with configurable parameters per channel, hardware isolation and independent alarms, imported core components for long-term stable operation.
Eight-channel Free Combination
8 analog inputs, each channel can select measurement parameters freely, hardware-isolated high/low alarms, one unit covers full water quality monitoring.
Plug & Play · Auto-identification
Automatic sensor identification enables free combination, interchangeability, plug-and-play — just connect the probe to get readings without tedious configuration.
Single / Dual / Multi-parameter Configurable
The same unit can be configured as single-parameter, dual-parameter or multi-parameter controller, deployed according to field needs for better cost savings.
7-inch Touchscreen Display
Object-oriented menu system, soft LCD backlight, clear display and simple operation, low maintenance, easy installation.
Real-time Monitoring · Automatic Alarm
24-hour real-time monitoring with automatic alarm on water quality anomalies, allowing users to detect risks and respond promptly.
Flexible Calibration · Multi-point Calibration
Users can self-set calibration tables and modify flexibly through the instrument, supporting custom multi-point calibration with high measurement accuracy and more reliable operation.
Specifications
Wall-mounted Unit · Device Specifications
All series share the same electrical and structural standards — select only by parameters, the unit model doesn't change. The table below shows general unit specifications for 201B~205B, can be directly included in comparison tables.
Display7-inch resistive touchscreen
Display Resolution800 × 480
Analog Input8 analog inputs
Digital CommunicationRS485 · Modbus (partially compatible)
Data Storage≥ 30,000 entries
Operating Temperature0 ~ 50 ℃
Temperature Range0 ℃ ~ 40 ℃
Temperature CompensationPt1000
Operating Humidity0 ~ 95 %RH
Storage Temperature-20 ~ 70 ℃
Protection RatingIP54
Operating VoltageAC220V
Weight14.5 kg
Dimensions600 × 800 × 200 mm
Power Supply85V~450VAC · 50Hz · 24W max
Mounting MethodWall-mounted · Snap fixation
Field Presets
Five Field Preset Solutions
Five factory presets correspond to five common water body types — select by model number; each set's range, resolution, and accuracy are listed below. Parameters can be added, removed, or adjusted according to field requirements.
MicroCONTROL-201BStandard 5-parameterGeneral Surface Water / Routine Monitoring
pH
pH Value
Range0~14.00 pH
Resolution0.01 pH
Accuracy±0.1 pH
EC
Conductivity
Range0~2000 μS/cm
Resolution0.1 μS/cm
Accuracy±2% FS
DO
Dissolved Oxygen
Range0~20 mg/L
Resolution0.01 mg/L
Accuracy±2% FS
NTU
Turbidity
Range0~2000 NTU
Resolution1 NTU
Accuracy±3% FS
T°
Temperature
Range0–40 ℃
Resolution0.1 ℃
Accuracy±0.4 ℃
MicroCONTROL-202BDrinking WaterSecondary Water Supply / Water Treatment Plant
pH
pH Value
Range0~14.00 pH
Resolution0.01 pH
Accuracy±0.1 pH
EC
Conductivity
Range0~2000 μS/cm
Resolution0.1 μS/cm
Accuracy±2% FS
Cl
Residual Chlorine
Range0~20 mg/L
Resolution0.01 mg/L
Accuracy±2% FS
NTU
Turbidity
Range0~20 NTU
Resolution0.001 NTU
Accuracy±3% FS
T°
Temperature
Range0–40 ℃
Resolution0.1 ℃
Accuracy±0.4 ℃
MicroCONTROL-203BSurface WaterRivers, Lakes, Reservoirs / Pollution Monitoring
pH
pH Value
Range0~14.00 pH
Resolution0.01 pH
Accuracy±0.1 pH
DO
Dissolved Oxygen
Range0~20 mg/L
Resolution0.01 mg/L
Accuracy±2% FS
NTU
Turbidity
Range0~2000 NTU
Resolution1 NTU
Accuracy±3% FS
COD
Chemical Oxygen Demand
Range0–100 mg/L
Resolution0.1 mg/L
Accuracy±5% FS
NH₄
Ammonia Nitrogen
Range0–100 mg/L
Resolution0.1 mg/L
Accuracy±5% FS
MicroCONTROL-204BAquacultureAquaculture Ponds / Recirculating Water
pH
pH Value
Range0~14.00 pH
Resolution0.01 pH
Accuracy±0.1 pH
EC
Conductivity
Range0~2000 μS/cm
Resolution0.1 μS/cm
Accuracy±2% FS
DO
Dissolved Oxygen
Range0~20 mg/L
Resolution0.01 mg/L
Accuracy±2% FS
NH₄
Ammonia Nitrogen
Range0–10 mg/L
Resolution0.01 mg/L
Accuracy±5% FS
NO₂
Nitrite
Range0–10 mg/L
Resolution0.01 mg/L
Accuracy±5% FS
MicroCONTROL-205BSwimming PoolSwimming Pool / Public Water
pH
pH Value
Range0~14.00 pH
Resolution0.01 pH
Accuracy±0.1 pH
ORP
ORP
Range±2000 mV
Resolution1 mV
Accuracy±0.2 mV
Cl
Residual Chlorine
Range0~20 mg/L
Resolution0.01 mg/L
Accuracy±2% FS
NTU
Turbidity
Range0~20 NTU
Resolution0.001 NTU
Accuracy±3% FS
T°
Temperature
Range0–40 ℃
Resolution0.1 ℃
Accuracy±0.4 ℃
Compatible Sensors
Eight channels, connect every probe you need
12 sensors with unified RS-485 digital output, auto-identified when connected to the unit — no re-calibration needed. Filter by measurement principle to quickly locate the required parameters and ranges.
ORPElectrode · Ion Adsorption
Redox Potential
Redox Potential
Range±2000 mV
Resolution0.1 mV
Accuracy±0.2 mV
IP68 · Immersion/Flow · 304L·POM · Φ30mm
DOUV Fluorescence
Dissolved Oxygen
Dissolved Oxygen
Range0–20 mg/L
Resolution0.01 mg/L
Accuracy±2% FS
IP68 · Immersion/Flow · Φ30mm · Maintenance-free Fluorescence
ECDiaphragm Polarography
Conductivity
Conductivity
Range0–2000 μS/cm
Resolution0.1 μS/cm
Accuracy±2% FS
IP68 · Immersion/Flow · 304L·POM · Φ30mm
ClMembrane Method
Residual Chlorine
Residual Chlorine
Range0–20 mg/L
Resolution0.01 mg/L
Accuracy±2%
IP68 · Immersion/Flow · Φ30mm · Drinking Water Suitable
NTUScattered Light Method
Turbidity
Turbidity
Range0–4000 NTU (ranged)
Resolution0.001 NTU
Accuracy±3% FS
IP68 · Immersion/Flow · Φ45/Φ80mm · <0.2MPa
CODUV254 Dual-wavelength Absorption
Chemical Oxygen Demand
COD
Range0–500 mg/L
Resolution0.01 mg/L
Accuracy±5%
IP68 · 316L · Φ45mm · Reagent-free
NH₄Membrane-covered Ion-selective
Ammonia Nitrogen
Ammonia Nitrogen
Range0–100 mg/L (ranged)
Resolution0.01 mg/L
Accuracy±5% FS
IP68 · PC · Φ30mm · <0.3MPa
SSInfrared Light Scattering
Suspended Solids
Suspended Solids
Range0–1500 mg/L
Resolution0.1 mg/L
Accuracy±5%
IP68 · 316L · Φ45mm · Measurable <50000mg/L
ChlFluorescence Method
Chlorophyll-a
Chlorophyll-a
Range0–500 μg/L
Resolution0.01 μg/L
Accuracy±5% FS
IP68 · 316L · Φ45mm · 0–100 RFU optional
BGAFluorescence Method
Blue-green Algae
Blue-green Algae
Range0–300,000 cells/mL
Resolution1 cells/mL
Accuracy±5%
IP68 · 316L · Φ45mm · Algal Bloom Warning
OilUV Fluorescence
Oil-in-Water
Oil-in-Water
Range0–50 ppm
Resolution0.001 ppm
Accuracy±3% FS
IP68 · 316L · Φ45mm · 0–0.50 FLU optional
Ion-Selective Series
12 Ion-selective Electrodes
Need to monitor characteristic pollutants or heavy metals? M200 series 12 ion electrodes with unified principle and customizable ranges, also RS-485 connected to the unit — covering nitrate, fluoride, cyanide to copper, lead and more.
Unified ±5.0% FS accuracy
Pressure 0–3 bar
PC/PBT anti-corrosion housing
Thread NPT3/4 · M39×1.5
RS-485 / 4–20mA
IP68
Signal cable 5m customizable
NO3−RS116
Nitrate Ion
0.01–14000 mg/LCustomizable range
Cl−RS117
Chloride Ion
1.8–35000 mg/LCustomizable range
F−RS118
Fluoride Ion
0.1–1900 mg/LCustomizable range
Cu2+RS119
Copper Ion
0–6400 mg/LCustomizable range
Pb2+RS120
Lead Ion
0–20000 mg/LCustomizable range
K+RS121
Potassium Ion
0–39000 mg/LCustomizable range
Ca2+RS122
Calcium Ion
0–40000 mg/LCustomizable range
Na+RS123
Sodium Ion
0–23000 mg/LCustomizable range
CN−RS124
Cyanide Ion
0–260 mg/LCustomizable range
Br−RS125
Bromide Ion
0–50000 mg/LCustomizable range
I−RS126
Iodide Ion
0–50000 mg/LCustomizable range
Ag/SRS127
Silver/Sulfide Ion
0–50000 mg/LCustomizable range
Applications
One unit, adaptable to multiple water bodies
From water sources to taps, from aquaculture ponds to drainage networks — change a set of sensors, and the same unit can adapt to different water bodies and operating conditions.
Rivers & LakesRivers & Lakes
Drinking Water · Water PlantDrinking Water
Secondary Supply · PipelineSecondary Supply
Wastewater TreatmentWastewater Process
Industrial · Manufacturing DischargeIndustrial Discharge
AquacultureAquaculture
Malodorous WaterMalodorous Water
Drainage NetworkDrainage Network
Swimming Pool · Public WaterPool & Public Water
Get In Touch
Configure the right unit
Configure the right unit
for your water body
Tell us the parameters to monitor, water body type and installation environment. We'll provide unit selection and sensor configuration list — parameters can be added, removed or adjusted according to actual needs.
Service Hotline139 2696 7285
Websitewww.hkinst.com
AddressNo. 40 Jinfeng West Road, (National) High-tech Zone, Zhuhai City, Guangdong Province