High-Precision Digital Nephelometers & Water Turbidity Meters
As a leading ISO-certified B2B analytical instrument manufacturer, Hangzhou Qiwei Instrument Co., Ltd. produces commercial-grade Nephelometers (Turbidity Meters) engineered for drinking water plants, environmental monitoring stations, beverage bottling lines, and municipal wastewater treatment compliance.
Designed in strict compliance with ISO 7027 and USEPA 180.1 optical standards, our nephelometers utilize 90° scattered light detection principles to deliver rapid, highly accurate, and repeatable turbidity readouts (NTU/FTU) with advanced stray light suppression.
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![Laboratory Portable Turbidity Meter]()
Laboratory Portable Turbidity MeterModel: 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]()
Laboratory Benchtop Turbidity MeterModel: 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 Turbidity Meter]()
Portable Turbidity MeterModel: WGZ-B, WGZ-1B, WGZ-20B, WGZ-200B
Principle: 90° scattered light
Minimum Indication: 0.1 NTU, 0.01 NTU, 0.1 NTU
Measuring Range: 0~200 NTU, 0~20 NTU, 0~200 NTU -
![Handheld Turbidity Meter]()
Handheld Turbidity MeterModel: ZD-2A, ZD-10A
Principle: 90° scattered light
Minimum Indication: 0.1 NTU
Measuring Range: 0~200 NTU, 0~1000 NTU -
![Portable Bacterial Turbidity Meter]()
Portable Bacterial Turbidity MeterModel: WGZ-XB
Minimum Indication: 0.001 MCF
Measuring Range: 0～5 MCF, 1 MCF=3×108 CFU/ml
Indication Error: ±5％ FS -
![Dual-Purpose Beer Turbidity Meter]()
Dual-Purpose Beer Turbidity MeterModel: PJZ-2
Principle: 90° scattered light
Minimum Indication: 0.1
Measuring Range: 0-200 NTU, 0-50 EBC -
![Beer Turbidity Meter]()
Beer Turbidity MeterModel: PJZ-1
Principle: 90° scattered light
Minimum Indication: 0.1
Measuring Range: 0-50 EBC -
![Benchtop Digital Turbidity Meter]()
Benchtop Digital Turbidity MeterModel: WGZ-1A
Basic Error: 2.5% FS
Repeatability: 1.5% FS
Zero Drift: 0.2 NTU -
![Benchtop Turbidity Meter]()
Benchtop Turbidity MeterModel: WGZ-200AS, WGZ-400AS, WGZ-500AS, WGZ-800AS, WGZ-1000AS
Principle: 90° scattered light
Measuring Range: 0-200 NTU, 0-400 NTU, 0-500 NTU, 0-800 NTU, 0-1000 NTU
Minimum:... -
![Benchtop McFarland Turbidity Meter]()
Benchtop McFarland Turbidity MeterModel: WGZ-XT
Minimun Indication: 0.01 MCF
Measuring Range: 0~5 MCF, 1 MCF=3×108 CFU/ml
Indication Error: ±6％ (±5％ FS)
Explore Our Turbidity Measuring Instrument Series
Versatile turbidity testing options designed for handheld field compliance checks and certified analytical laboratory workflows.
Critical Industrial Applications & Engineering Strengths
Why Water Turbidity Monitoring is Vital
Turbidity measures the clarity and suspended particle content in water. It is a primary parameter for evaluating drinking water filtration and microbial safety. Key applications include:
- Municipal Drinking Water Plants: Monitoring raw water intake, coagulation efficiency, and filter performance ($< 0.1\,NTU$)
- Bottled Water & Beverage Industry: Ensuring product clarity and regulatory compliance before packaging
- Wastewater Final Effluent: Verifying suspended solid clarity prior to environmental discharge
- Environmental Water Surveys: Tracking river sedimentation, runoff, and ecological health
Qiwei Manufacturing & OEM Advantages
Supporting global water treatment suppliers, instrument distributors, and system integrators:
- ISO 7027 Compliant Optics: 90° nephelometric infrared LED light source ensures minimal stray light and high sensitivity
- Stable Calibration Standards: Supplied with non-toxic polymer AMCO Clear standards for repeatable and reliable calibration
- OEM & ODM Customization: Logo branding, custom housing colors, and localized language software UI
- Internal Links: Combine with our Free Chlorine Analyzers, TSS Meters, Spectrophotometers, and Sulfuric Acid Meters for complete water analysis.
Frequently Asked Questions (Nephelometer Sourcing Guide)
Q1: What optical standard do Qiwei Nephelometers follow?
Our turbidity meters comply with ISO 7027 (using an infrared 860 nm LED light source) and USEPA 180.1 standards, ensuring globally accepted and comparable turbidity measurements.
Q2: How often should a nephelometer be calibrated?
For routine laboratory or field use, we recommend verifying calibration weekly using AMCO Clear polymer standards. Online continuous sensors should be verified monthly or cleaned using their built-in wipers.
Q3: Do you support OEM custom branding and wholesale distributor pricing?
Yes, as a factory-direct manufacturer, we offer complete OEM/ODM custom branding, customized UI interfaces, and tiered volume discounts for global laboratory and water treatment equipment suppliers.
Require Factory Direct Pricing or Custom Turbidity Testing Solutions?
Get in touch with Hangzhou Qiwei Instrument today for technical consultation, optical options, and competitive distributor pricing within 24 hours.
Hangzhou Qiwei Instrument Co., Ltd. is one of the most reliable manufacturers and suppliers of nephelometer in China, featured by quality products and good service. Please rest assured to buy bulk durable nephelometer in stock here from our factory. We also accept customized orders.
Benchtop Digital Turbidity Meter, Laboratory Portable Turbidity Meter, Portable Bacterial Turbidity MeterPopular Products
Temperature Range: Room temperature +5-99.9℃
Display Resolution: 0.1℃
Display...
Measuring Range: 0.00-199.99
Whiteness Formula: Blue Whiteness WB=R475
Light...
Measuring Range: PH: 0 ~ 14.00; mV: ±1999; Temperature: 0 ~ 100 °C
Resolution: PH:...
Counter Capacity: 0-999
LED Light Source Power: 7W
Magnifying Glass Magnification:...
Timing Function: No
Displayer: No
Speed: 0-1600 rpm
Number of processed samples: 12 independent controls
Scope of use of test...
Timing Function: Without
Motor Power: 200W
Range Of Speed: 200～9000rpm
Operation Mode: horizontal orbital motion
Timing Range: No
Speed Range: 50～210rpm