Floor-standing Multi-parameter Water Quality Online Monitor · Floor-standing Monitor 

Integrated vertical cabinet,
ready as a monitoring station

MicroCONTROL-301B~305B — vertical integrated cabinet, no wall mounting needed, just place on site and it's ready. 8 analog channels for flexible single/dual/multi-parameter combinations, sensors are plug-and-play with auto-identification. Five preset solutions (301B~305B) 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
Floor-standing Multi-parameter Water Quality Online Monitor
Field Presets / Field Presets
301BStandard 5-parameter 302BDrinking Water 303BSurface Water 304BAquaculture 305BSwimming Pool
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.

Smart Multi-parameter Water Quality Analyzer Online
pH7.42
Dissolved Oxygen mg/L8.34
Turbidity NTU2.5
Temperature ℃25.0
Conductivity μS/cm513
Residual Chlorine mg/L0.48
MicroCONTROL · 7″ Touchscreen · RS485 / Modbus
Live Monitoring

Real-time readings on screen,
instant alarm on over-limit

Read directly from the cabinet front panel — 7-inch touchscreen display shows real-time values for each channel locally, with automatic audible and visual alarm on threshold exceedance. The same data is transmitted directly to the upper platform via RS-485 / Modbus, synchronized locally and in the cloud.

  • Local7″ touchscreen display · real-time readings per channel
  • AlarmOver-limit audible and visual alarm · relay / switch output
  • CloudRS-485 / Modbus · data direct to platform
  • Storage≥30,000 history entries · data preserved on power loss
Specifications

Floor-standing Cabinet · Device Specifications

All series share the same electrical and structural standards — select only by parameters, the model doesn't change. The table below shows general unit specifications for 301B~305B, 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
Weight49.5 kg
Dimensions500 × 440 × 1500 mm
Power Supply85V~450VAC · 50Hz · 24W max
Mounting MethodFloor-standing cabinet · Integrated chassis
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-301BStandard 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-302BDrinking 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-303BSurface 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-304BAquacultureAquaculture 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-305BSwimming 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.

pHCombined Electrode

pH Value

pH Value
Range0.00–14.00 pH
Resolution0.01 pH
Accuracy±0.2 pH
IP68 · Immersion/Flow · 304L·POM · Φ30mm
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 cabinet, forms a monitoring station on site

From river cross-sections to water sources, from industrial park discharge outlets to rural sewage stations — floor placement enables independent station setup, and the same cabinet adapts 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
Field Accessories

Optional accessories, complete on-site deployment

In addition to the unit and sensors, field accessories for installation, cleaning, communication, power supply and alarm are all optional — freely combine according to station conditions, fully equipped and ready to use out of the box.

Installation

Flow Cell / Immersion Mount

Flow Cell / Mount

Φ30 / Φ45 universal interface, immersion or flow-through installation.

Maintenance

Auto-Cleaning Unit

Auto-Cleaning

Air / brush self-cleaning, extends maintenance-free period.

Sampling

Sampling Pre-treatment

Sampling Unit

Self-priming pump + filtration, suitable for turbid water and sewage scenarios.

Communication

4G Cloud Gateway · DTU

4G Gateway

RS-485 to 4G, data direct to cloud platform.

Calibration

Standard Solution Calibration Kit

Calibration Kit

Multi-point calibration standard solutions, rapid on-site calibration.

Alarm

Audible & Visual Alarm Beacon

Alarm Beacon

Over-limit audible and visual alarm, relay / switch output.

Protection

Outdoor Sun & Rain Shield

Sun & Rain Shield

Outdoor sun and rain protection, for long-term use with IP54.

Power

UPS Backup Power

UPS Backup

Power outage endurance, ensures continuous uninterrupted monitoring.

Get In Touch

Configure the right cabinet
for your station

Tell us the parameters to monitor, water body type and installation environment. We'll provide cabinet selection and sensor configuration list — parameters can be added, removed or adjusted according to actual needs.

Call Selection Hotline →
Service Hotline139 2696 7285
Websitewww.hkinst.com
AddressNo. 40 Jinfeng West Road, (National) High-tech Zone, Zhuhai City, Guangdong Province