The LK-4200 Multi-parameter Water Quality Analysis System adopts an all-in-one structural design, capable of simultaneously detecting parameters such as temperature, conductivity, salinity, turbidity, optical dissolved oxygen, chlorophyll, and water depth.
The LK-4200 features a special self-cleaning design, equipped with self-cleaning components that can eliminate bubbles and prevent microbial growth, enabling monitoring in various water environments including rivers, lakes, oceans, reservoirs, industrial water, and groundwater. It boasts high reliability and can operate for months without maintenance in unattended environments.
The LK-4200 Multi-parameter Water Quality Analysis System adopts an all-in-one structural design, capable of simultaneously detecting parameters such as temperature, conductivity, salinity, turbidity, optical dissolved oxygen, chlorophyll, and water depth.
The LK-4200 features a special self-cleaning design, equipped with self-cleaning components that can eliminate bubbles and prevent microbial growth, enabling monitoring in various water environments including rivers, lakes, oceans, reservoirs, industrial water, and groundwater. It boasts high reliability and can operate for months without maintenance in unattended environments.
Key Features:
Technical Parameters
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Host |
Parameter |
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Ports |
1 host communication port, 7 base ports (including 6 sensor ports and 1 cleaning component port) |
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Dimensions |
L: 786.60mm, D: 80mm |
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Weight |
6 kg |
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Operating Temperature |
-5 ℃ to +50 ℃ (under conditions where the water body does not freeze) |
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Storage Temperature |
-20 ℃ to +80 ℃(storage temperature for pH/ORP sensors is 0 to 60 ℃) |
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Depth Rating |
0～300m(host) |
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Communication Methods |
Bluetooth wireless communication, RS485 cable communication |
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Operating Time |
Up to 8 hours of continuous operation (powered by internal battery)* |
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Data Storage |
4Gb; ≥5 million data entries |
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Sensors |
pH |
ORP |
Salinity |
Fluorescent Dissolved Organic Matter (fDOM) |
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EC |
T |
NTU |
Total Suspended Solids (TSS) |
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DO |
Chlorophyll |
CYANO |
Total Dissolved Solids (TDS) |
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Depth |
COD |
NH4+ |
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Accessories |
Host unit / Sensors / Measuring cup / Calibration cup |
Cable |
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Measurement and Analysis Software |
Carrying Case |
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Warranty |
1-year warranty for sensor bodies, 1-year warranty for pH and ORP electrodes, 6-month warranty for ionic electrodes |
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▲ The LK-4200 can operate continuously for 8 hours with a sampling interval of 1s, equipped with pH, ORP, temperature, conductivity, dissolved oxygen, turbidity, chlorophyll sensors, and a cleaning brush that operates every 15 minutes. Battery operating time largely depends on sensor configuration.
Structural Description:
The base of the LK-4200 portable multi-parameter water quality monitoring sensor features a total of 7 connection ports, including 6 ports for water quality monitoring sensors and 1 port for a cleaning component.
Optional Sensors and Parameters
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Sensor |
Measurement Range |
Measurement Accuracy |
Resolution |
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pH |
0 to 14 pH |
±0.1 pH |
0.01 pH |
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ORP |
-1999 to +1999mV |
±20mV( in standard solution ) |
±0.1mV |
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EC |
0 to 200ms/cm |
0 to 100: ±0.5% of reading; 100 to 200: ±1% of reading |
1μS/cm to 100μS/cm(Based on range) |
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Depth |
0 to 100m, 200m, 300m range options |
＜±0.05%F.S |
0.001-0.1m(Based on range) |
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DO |
0 to 200% saturation, 0 to 20mg/L |
0～100%: <±1%; 100～200%: <±1.5% |
0.001～0.01mg/ L |
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Temperature |
0 to 50℃ |
±0.2℃ |
0.01℃ |
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Chlorophyll |
0 to 400ug/L |
R² >0.999 |
0.01ug/L |
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Cyanobacteria |
0 to 100ug/L or 0 to 100RFU |
R² >0.999 |
0.01ug/L |
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NTU |
0.01 to 4000NTU |
0 to 10NTU: ±0.1NTU; 10 to 100NTU: ±2% of reading or ±0.1NTU (whichever is greater); 100 to 4000NTU: ±5% of reading |
0-10NTU:0.01NTU; 10-100NTU:0.1NTU; 100-4000NTU:1NTU |
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SALT |
0 to 80 ppt |
±1% of reading |
0.01ppt |
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fDOM |
0 to 200 ppb |
±1% of reading |
0.01ppb |
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TSS |
0 to 50000 g/L |
Based on range |
Based on range |
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TDS |
0 to 1000 mg/L |
Based on range |
Based on range |
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COD |
0.1 to 1000mg/L (equiv.KHP)(200, 500, 1000 range options) |
±2% or 0.5 mg/L (whichever is greater) (equiv. KHP) |
0.1mg/L(equiv. KHP) |
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NH4+ |
0-10、100、1000mg/ Lrange options |
10% or ±0.2mg/L (whichever is greater) |
0.01mg/L-0.1mg/L (based on range) |
▲ The instrument parameters listed are performance parameters under typical application conditions and do not include possible future changes.
▲ Accuracy parameters are obtained under stable and controlled environmental conditions and may differ from actual application in natural environments.
