KNF-500PRO Online Multi-Parameter Water Quality Sensor 6 Probes RS485 MODBUS IP68 Self-Cleaning
KNF-500PRO Online Multi-Parameter Water Quality Sensor
The Kainafu KNF-500PRO online multi-parameter sensor adopts a multi-in-one modular structure. Each single-parameter sensor is an independent RS485 digital probe that seals water-tightly onto the main body. Calibration data is stored inside each probe, allowing simple on-site calibration or replacement. It measures water temperature, pH, ORP, dissolved oxygen, turbidity, chlorophyll, cyanobacteria, conductivity (salinity), water oil, ammonia nitrogen and depth — supporting up to 6 probes / 7 parameters on one main body.
Key Features
- RS485 output, standard MODBUS protocol — easy connection to data acquisition platforms and automatic water quality monitoring stations.
- Up to 6 freely selectable probes — DO, conductivity (salinity), turbidity, pH, ORP, chlorophyll, cyanobacteria, water oil, ammonia nitrogen and depth can be combined on demand.
- Automatic cleaning brush — cleans at set intervals to remove bubbles and contamination, ideal for long-term unmanned online monitoring.
- Field-replaceable probes — each probe can be removed for direct calibration, replacement and maintenance.
- Efficient acquisition & alarms — fast response, with power-supply, communication and cleaning-brush abnormal alarms built into the mother unit.
- IP68 protection — robust titanium alloy / POM / anti-fouling copper construction for wastewater, surface water, marine water and groundwater.
Technical Specifications
| Product Name | Kainafu KNF-500PRO Multi-parameter Water Quality Sensor |
|---|---|
| Probe Capacity | Up to 6 probes (7 parameters), 1 central cleaning brush |
| Measurement Depth | 0-30 m (pH / ORP 20 m) |
| Size | 84 mm × 476 mm |
| Weight | 2.3 kg (mother unit + 6 sensors) |
| Output | Continuous RS-485, MODBUS protocol |
| Cleaning | Automatic brush, default every 30 minutes (interval settable) |
| Power Supply | DC 12-24 V, ≥1 A (whole machine); 9-24 V, ≥1 A (single probe) |
| Power Consumption | 0.8 W (brush off) / 2 W (brush rotating) |
| Protection Level | IP68 |
| Cable Length | 10 m default (customizable), waterproof connectors |
| Material | POM, titanium alloy, anti-fouling copper |
Install sensors
|
Parameters |
Measurement principle |
Measurement range |
Precision |
Material |
|
Dissolved oxygen |
Fluorescence method |
0-50 mg/L or 0-500% Saturation |
0-20mg/L :±1%or±0.2mg/L(Whichever is greater); >20mg/L :±5% or ±0.6mg/L |
Titanium alloy |
|
Turbidity |
90° scattered light |
0-1000NTU or 0-4000NTU |
±5% or 0.3NTU(Whichever is greater) |
Titanium alloy |
|
Conductivity (Salinity) |
Four-electrode |
EC:0-200mS/cm(Optional 0-2mS/cm,2-20mS/cm,20-200mS/cm);Salinity:0-175ppt; TDS:0-128000mg/L |
EC:±1% or 0.01mS/cm(Whichever is greater); Salinity:±1ppt |
Titanium alloy+PEEK |
|
Water oil |
Ultraviolet fluorescence method |
0-50ppm或 0-150ppm |
Linearity R²>0.999 |
Titanium alloy |
|
pH |
Glass electrode method |
0-14 pH |
±0.02 pH |
Titanium alloy+POM |
|
ORP |
Platinum electrode method |
-1999-+1999mV |
±20mV |
Titanium alloy+POM |
|
Chlorophyll |
Fluorescence method |
0-500μg/L |
±5% or 0.5μg/L(Whichever is greater); Linearity R²>0.999 |
Titanium alloy |
|
Blue-green algae |
Fluorescence method |
0 ~ 300,000 cells/mL(Customizable up to 0-2,000,000) |
±10% or ±0.5mg/L(Whichever is greater) |
Titanium alloy |
|
Ammonia nitrogen |
Ion electrode method |
0-100mg/L(Optional0-1000mg/L) |
<0.1%F.S. |
Titanium alloy+POM |
|
Depth |
Pitot-type |
0m-2m...100m(Optional) |
<0.1%F.S. |
316L(Optional Titanium) |
|
Temperature |
Thermistor |
-5-50℃ |
±0.2℃ |
/ |
Applications
Wastewater treatment plants, surface water and river monitoring, marine water, groundwater, aquaculture, and drinking-water sources requiring long-term unmanned online monitoring.
Contact us for OEM options, probe combinations and bulk pricing.
Get in Touch
Have questions about our products or want to discuss a custom order? Our team is ready to help you.