LT-NB online multi-parameter water quality analyzer open-frame design for OEM system integration and remote monitoring
LT-HBC outdoor multi-parameter water quality analyzer with touchscreen enclosure for continuous online water monitoring
LT-HBK stainless steel multi-parameter water quality monitoring system for drinking water and industrial treatment applications
LT-HBM multi-parameter water analyzer internal sensor module with flow cell for pH turbidity and disinfectant monitoring
LT-NB online multi-parameter water quality analyzer open-frame design for OEM system integration and remote monitoring
LT-HBC outdoor multi-parameter water quality analyzer with touchscreen enclosure for continuous online water monitoring
LT-HBK stainless steel multi-parameter water quality monitoring system for drinking water and industrial treatment applications
LT-HBM multi-parameter water analyzer internal sensor module with flow cell for pH turbidity and disinfectant monitoring

LT-NB Modular Multi-Parameter Water Quality Analyzer Kit

LOOTEST supplies the LT-NB, a compact multi-parameter water quality analyzer kit for drinking water monitoring, OEM integration, and remote control.

• Modular monitoring: turbidity, disinfectant residuals, temperature and pH, with optional ORP, conductivity, TDS and dissolved oxygen.
• Low-level turbidity monitoring with 0.005 NTU detection limit and selectable 0–1 / 20 / 100 NTU ranges.
• Compact 370 × 470 × 140 mm system for OEM skids, cabinets and water-treatment equipment integration.
• RS-485 Modbus RTU communication for PLC, SCADA and remote data acquisition.
• Reagentless three-electrode amperometric disinfectant measurement helps reduce routine reagent handling.

LT-NB Multi-Parameter Water Analyzer Description

The LT-NB Modular Multi-Parameter Water Quality Analyzer Kit is a compact online water quality monitoring system supplied by LOOTEST Instruments for system integrators, OEM projects, and water treatment equipment manufacturers. Its modular architecture combines turbidity, disinfectant residuals, temperature and pH, with optional ORP, conductivity, TDS, and dissolved oxygen modules. A 370 × 470 × 140 mm layout and RS-485 Modbus RTU interface simplify panel integration and remote data acquisition. The LT-NB is suitable for drinking water plants, distribution networks, secondary water supply, tap-water monitoring, swimming pools, and customized treatment systems.

LT-NB Water Quality Analyzer Technical Data Sheet

Item Specification Value
System Power 5 W
Weight Approx. 4.5 kg
Dimensions (W × H × D) 370 × 470 × 140 mm
Operating Humidity ≤95% RH (non-condensing)
Sample Flow 500–2000 mL/min
Inlet Pressure ≤0.6 MPa
Operating Temperature -5℃ to +45℃
Communication Interface RS-485 with Modbus RTU protocol
Turbidity Measurement Method 90-degree laser nephelometry
Light Source 660 nm laser
Range 0–1 / 20 / 100 NTU
Resolution 0.0001 NTU (<1 NTU); 0.001 NTU (≥1 NTU)
Limit of Detection 0.005 NTU
Sample Flow 0.3–2 L/min
Zero Stability ≤1.5%
Long-Term Stability ≤1.5%
Accuracy ±2% or ±0.02 NTU, whichever is greater; based on Formazin primary standard at 25℃
Repeatability ±1% or ±0.006 NTU, whichever is greater; based on Formazin primary standard at 25℃
Response Time (T90) ≤120 s
Calibration Factory-calibrated default curve; single-point; Formazin two-point; 2–6 point custom calibration
Disinfectant Residuals Measurement Method Reagentless electrochemical three-electrode amperometric system
Repeatability ±3%
Resolution 0.001 mg/L
Limit of Detection 0.030 mg/L or lower
Range 0–5 / 20 mg/L
Accuracy ±3% (DPD method correlation error ±10% or ±0.05 mg/L, whichever is greater)
Response Time (T90) ≤90 s
Calibration Single-point; two-point
Sample pH Range 4–9 pH
Configuration Note Available disinfectant type is project-dependent; confirm the selected analyte and sensor specification before order.
Temperature Measurement Method Thermistor-based measurement
Range -5 to +60℃
Resolution 0.1℃
Accuracy ±0.4℃
Repeatability 0.2℃
Response Time (T90) ≤25 s
Calibration Single-point
pH Measurement Method Electrochemical method (glass electrode)
Range 0–14 pH
Resolution 0.01 pH
Accuracy ±0.5 pH
Repeatability 0.01 pH
Response Time (T90) ≤60 s
Calibration Single-point; two-point; three-point
ORP

(Optional)

Measurement Method Electrochemical method (electrode)
Range -2000 mV to +2000 mV
Resolution 1 mV
Limit of Detection 1 mV
Accuracy ±20 mV
Repeatability 10 mV
Response Time (T90) ≤60 s
Calibration Single-point; two-point
Conductivity (Optional) Measurement Method Conductivity cell with automatic temperature compensation
Range 0–20,000 μS/cm; pure-water electrode: 0–20 μS/cm
Resolution 0.01 μS/cm
Limit of Detection 6 μS/cm
Accuracy ±0.8% F.S.; pure-water electrode: ±3% F.S.
Repeatability 0.4% F.S.
Response Time (T90) ≤30 s
Calibration Single-point
TDS

(Optional)

Measurement Method Conductivity cell with automatic temperature compensation
Range 0–10,000 mg/L; pure-water electrode: 0–10 mg/L
Resolution 0.01 mg/L
Limit of Detection 3 mg/L
Accuracy ±0.8% F.S.; pure-water electrode: ±3% F.S.
Repeatability 0.4% F.S.
Response Time (T90) ≤30 s
Calibration Single-point
Dissolved Oxygen (Optional) Measurement Method Fluorescence-based method
Range 0–20 mg/L (0–200% saturation)
Resolution 0.01 mg/L
Repeatability ±3% or ±0.2 mg/L, whichever is greater
Limit of Detection 0.1 mg/L
Response Time (T90) ≤60 s
Accuracy ±3% or ±0.2 mg/L, whichever is greater
Calibration Air calibration

LT-NB Online Water Quality Analyzer Applications

The LT-NB is designed for continuous multi-parameter monitoring in drinking-water and treated-water processes. Typical applications include municipal water treatment plants, distribution networks, secondary water supply stations, tap-water monitoring points, swimming pool treatment systems, and OEM water-treatment equipment. Its configurable sensor modules make it especially useful for system integrators that need one compact platform for turbidity, disinfectant residuals, pH, temperature and other optional parameters, while RS-485 Modbus RTU supports integration with PLC, SCADA and remote monitoring systems.

Multi-Parameter Water Quality Monitor Details

Extra Information

Modular Multi-Parameter Configuration
Configure the LT-NB around the parameters required by each project. Standard monitoring can include turbidity, disinfectant residuals, temperature and pH, while ORP, conductivity, TDS and dissolved oxygen are optional. This reduces unnecessary hardware and gives OEM customers more flexibility when building different monitoring packages.

Integration-Friendly Online Monitoring
The compact 370 × 470 × 140 mm structure, 5 W system power and RS-485 Modbus RTU interface make the analyzer practical for control cabinets, OEM skids, secondary water supply systems and remote stations. Standard digital communication simplifies connection to PLC, SCADA and data acquisition platforms.

Low-Turbidity Measurement for Treated Water
The turbidity module uses 90-degree laser nephelometry with a 660 nm light source. Selectable 0–1 / 20 / 100 NTU ranges, 0.005 NTU detection limit and fine resolution support continuous monitoring of drinking water and other low-turbidity samples where small changes in clarity need to be detected.

Reagentless Disinfectant Residual Monitoring
The disinfectant module uses a reagentless three-electrode amperometric principle, helping reduce routine chemical handling and consumable use. Available disinfectant configurations can include free chlorine, total chlorine, chlorine dioxide or ozone; the final sensor configuration and applicable specifications should be confirmed according to the target disinfectant and sample-water conditions.

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OEM configuration support

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