Professional Water Quality Test Equipment & Laboratory Analytical Solutions

As a premier B2B manufacturer and exporter of advanced laboratory instruments, Hangzhou Qiwei Instrument Co., Ltd. delivers precision-engineered water quality test equipment designed for industrial wastewater treatment, environmental monitoring, municipal water plants, and scientific research laboratories worldwide.

Our comprehensive portfolio includes portable meters, benchtop multi-parameter analyzers, COD/BOD testers, and turbidity sensors built to meet international testing standards (ISO/CE). We provide flexible OEM, ODM, and bulk wholesale solutions tailored for global distributors and laboratory contractors.

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Portable COD Meter
Model: QW-COD-B
Ambient Temperature: 5 - 40℃
Relative Humidity: < 85% (no condensation)
Power Supply: AC 220V±10% / 50Hz
Benchtop COD Analyzer
Model: QW-COD-T
Ambient Temperature: 5 - 40℃
Relative Humidity: < 85% (no condensation)
Power Supply: AC 220V±10% / 50Hz
Portable Ammonia Nitrogen Meter
Model: AD-82B
Measuring Range: 0.00~10 mg/L
Indication Error: ±5% FS
Repeatability: ≤3%
Size: 266×200×130 mm
Portable Ozone Meter
Model: Y-615
Measuring Range: 0~0.96 mg/L
Power Supply: AC 110-240V/DC 5V power adapter or 5 ×AA batteries
Resolution: 0.01 mg/L
Portable Chlorine Dioxide Meter
Model: L-612
Measuring Range: 0~5 mg/L
Resolution: 0.01 mg/L
Repeatability: 0.01
Linear Error: ±5% FS
Portable Phosphate Meter
Model: LSY-1
Measuring Range: 0~1.84 mg/L
Resolution: 0.01 mg/L
Repeatability: 0.01
Linear error: ±5% FS
Portable Sulfate Meter
Model: BLSY-200
Measurement Range: 0-200 mg/L
Resolution: 0.1 mg/L
Repeatability: 0.01
Linear Error: ± (5% FS+1)
Laboratory Portable Turbidity Meter
Model: ZD-201, ZD-401, ZD-501, ZD-801, ZD-1001
Principle: 90° scattered light
Minimum Display Value: 0.1/0.01 NTU
Display Error: ±6% (±2% FS)
Laboratory Benchtop Turbidity Meter
Model: WGZ-200AS, WGZ-400AS, WGZ-500AS, WGZ-800AS, WGZ-1000AS
Principle: 90° scattered light
Minimum Value (NTU): 0.1
Indication Error: ±6% (±2% FS)
Portable Free Chlorine Meter
Model: ZYC, ZYL, ZYL10
Measuring Range: 0.10~4.80 mg/L, 0~5 mg/L, 0~10 mg/L
Resolution: 0.01mg/L
Repeatability: 0.01
Total Nitrogen Tester
Model: BZD-100
Measuring Range: Low range: 0~25 mg/L, High range: 20~100 mg/L
Power Supply: 220±10V
Resolution: 1mg/L
Total Phosphate Tester
Model: BZL-1
Measuring Range: 0~1.20 mg/L
Resolution: 0.01 mg/L
Repeatability: 0.01
Linear Error: ±5% FS

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Comprehensive Water Testing Instrument Categories

Designed for high accuracy, durability, and seamless integration into industrial automation or rigorous lab workflows.

1. Benchtop & Portable Multi-Parameter Analyzers

Engineered for precision laboratory measurement of pH, EC, TDS, Salinity, and Dissolved Oxygen (DO) with automatic temperature compensation (ATC) and data logging capabilities.

High-resolution LCD touch screen
GLP compliant data management
Ideal for R&D labs & environmental monitoring

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2. COD, BOD & Heavy Metal Rapid Detectors

Specialized photometric analysis equipment designed for wastewater compliance testing. Fast digestion and pre-programmed calibration curves drastically reduce testing time for industrial plants.

Pre-installed standard testing curves
Batch sample digestion reactors
Strict compliance with EPA testing protocols

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3. Online Monitoring Sensors & Turbidimeters

Continuous 24/7 online monitoring instruments for turbidity, residual chlorine, and total suspended solids (TSS), featuring RS485 Modbus outputs for industrial SCADA integration.

IP68 waterproof industrial housing
Real-time telemetry and alarm outputs
Low maintenance optical sensor design

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Why Global B2B Clients Choose Qiwei Water Testing Solutions

☑ ISO & CE Certified Manufacturing

All our water quality test instruments undergo strict quality control and calibration procedures, meeting European and international safety and precision benchmarks.

☑ OEM / ODM Customization Services

We support tailored software interfaces, private-label branding, specialized probe configurations, and localized packaging for distributors and brand owners.

☑ Robust Supply Chain & Technical Support

Backed by seasoned R&D engineers, we offer rapid sample dispatch, comprehensive user documentation, video calibration tutorials, and dependable after-sales warranty.

Ready to Upgrade Your Water Testing Capabilities or Expand Your Product Line?

Partner with Hangzhou Qiwei Instrument for factory-direct wholesale pricing, custom laboratory instrument development, and professional technical support. Contact our engineering team today for a prompt response within 24 hours.

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Hangzhou Qiwei Instrument Co., Ltd. is one of the most reliable manufacturers and suppliers of water quality test equipment in China, featured by quality products and good service. Please rest assured to buy bulk durable water quality test equipment in stock here from our factory. We also accept customized orders.