High-Precision Free Chlorine Analyzers & Residual Chlorine Meters

As a leading ISO-certified B2B analytical instrument manufacturer, Hangzhou Qiwei Instrument Co., Ltd. produces commercial-grade Free Chlorine Analyzers (Residual Chlorine Meters) engineered for drinking water disinfection, swimming pool sanitation, municipal wastewater treatment, and food process water monitoring.

Utilizing standard DPD spectrophotometric detection methods, our chlorine meters provide rapid response times, high optical repeatability, and precise direct readouts (mg/L Cl2) to help facility managers comply with public health safety guidelines.

Get Bulk Wholesale Quote Download Chlorine Meter Specification

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
Benchtop Free Chlorine Meter
Model: YL-1Z
Measuring Range: 0~5 mg/L
Power Supply: 220V
Resolution: 0.01 mg/L
Benchtop High Range Residual Chlorine Analyzer
Model: YL-10Z
Measuring Range: 0~10 mg/L
Power Supply: 220V
Resolution: 0.01 mg/L

Explore Our Chlorine Testing Equipment Series

Versatile chlorine analysis options designed for handheld field compliance checks and certified analytical laboratory workflows.

1. Portable Field Chlorine Testers

Handheld, waterproof photometers pre-calibrated for rapid on-site free and total chlorine verification in swimming pools, drinking water networks, and spa resorts.

Measurement Range: 0.00 – 5.00 mg/L $Cl_2$
IP65 waterproof field case with pre-dosed DPD reagents
Single-button zero calibration & fast testing cycle

Get Portable Kit Specs →

2. Benchtop Laboratory Chlorine Analyzers

Precision benchtop spectrophotometric units equipped with high-resolution narrow-band optics, GLP compliant memory storage, and USB data transmission for testing laboratories.

High optical accuracy & repeatability
Pre-installed DPD method working curves
Ideal for municipal water quality testing labs

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3. Multi-Parameter Disinfectant Analyzers

Comprehensive photometers combining Free Chlorine, Total Chlorine, Ozone, Chlorine Dioxide, and pH testing in one portable instrument for complete disinfection control.

All-in-one disinfectant parameter testing
Reduces equipment outlay for water treatment plants
Customizable testing programs for specialized facilities

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Critical Industrial Applications & Engineering Strengths

Why Free Chlorine Monitoring is Vital

Free chlorine ($Cl_2$) is the active sanitizing agent in water disinfection. Insufficient chlorine risks microbial contamination, while excess chlorine causes harmful byproducts. Key applications include:

Municipal Drinking Water: Maintaining residual disinfectant levels throughout distribution pipelines
Commercial Swimming Pools & Spas: Routine sanitation compliance checks ($0.3 - 1.0\,mg/L$)
Food & Beverage Processing: Sanitizing wash water for fruits, vegetables, and bottling equipment
Wastewater Final Effluent: Ensuring complete pathogen deactivation prior to environmental discharge

Qiwei Manufacturing & OEM Advantages

Supporting global water treatment suppliers, pool maintenance distributors, and instrument brands:

High-Precision DPD Chemistry: Fast color development and high stability with pre-dosed powder pillows
Stable Optical Module: Long-life LED light source eliminates frequent light bulb replacement and warm-up drift
OEM & ODM Customization: Logo branding, custom carrying cases, and localized language software UI
Internal Links: Combine with our Spectrophotometers, TSS Meters, Nickel Testers, and Sulfuric Acid Meters for complete water analysis.

Frequently Asked Questions (Free Chlorine Analyzer Sourcing Guide)

Q1: What analytical method do Qiwei Free Chlorine Analyzers use?

Our chlorine meters utilize the standard DPD (N,N-diethyl-p-phenylenediamine) colorimetric method, producing a pink color proportional to the free chlorine concentration for highly accurate photometric measurement.

Q2: What is the difference between Free Chlorine and Total Chlorine testing?

Free chlorine represents dissolved hypochlorous acid and hypochlorite ions that actively sanitize water. Total chlorine includes both free chlorine and combined chlorine (chloramines). Separate DPD reagent packets allow testing for both parameters.

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 pool supply distributors.

Require Factory Direct Pricing or Custom Free Chlorine Testing Solutions?

Get in touch with Hangzhou Qiwei Instrument today for technical consultation, reagent options, and competitive distributor pricing within 24 hours.

Inquire Now & Get Quote Talk to Instrument Engineer

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

free chlorine analyzer, Portable Free Chlorine Meter