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Description 10 Manufacturers 102 Products
Zhejiang Lohand Environment Technology Co.,Ltd.
Supmea Automation Co.,Ltd
SNEW TRADING & SOLUTION SDN BHD
SIBATA SCIENTIFIC TECHNOLOGY LTD
Shanghai BOQU Instrument Co.,Ltd
Shandong Renke Control Technology Co.,Ltd.
Oxidation Technologies, LLC.
HORIBA
Analyticon

10 Residual Chlorine Meter Manufacturers in 2025

This section provides an overview for residual chlorine meters as well as their applications and principles. Also, please take a look at the list of 10 residual chlorine meter manufacturers and their company rankings. Here are the top-ranked residual chlorine meter companies as of May, 2025: 1.HORIBA, 2.Qingdao Yongying Environmental Protection Technology Co., Ltd, 3.SNEW TRADING & SOLUTION SDN BHD.

Table of Contents

Categories Related to Residual Chlorine Meters

Water Testers

What Is a Residual Chlorine Meter?

Residual Chlorine MetersA residual (amperometric) chlorine meter is a device to measure the amount of free effective chlorine and bound effective chlorine such as chloramine that remains in water after treatment with chlorinated chemicals at water purification plants.

It measures the amount of chlorine remaining in the water after 30 minutes of application of chlorine contracting agents, which are used to prevent the spread of waterborne diseases, it is indicated in units of ppm.

Residual chlorine has strong disinfecting power, but is almost completely eliminated in the drainage pipe. When residual chlorine is present to some extent, its disinfection effect can be maintained.

However, when residual chlorine is present in excessive amounts, it has a strong chlorine odor and corrodes metals and other materials.

It is also a well-known cause of the formation of carcinogens,
Therefore, it must be accurately measured for water quality control, daily inspections, and maintenance.

Uses of Residual Chlorine Meters

Residual chlorine meters are mainly used in public facilities, such as buildings, apartment buildings, schools, hospitals, community centers, and food and beverage factories, cooking facilities, swimming pools, elevated water tanks, and other places where water quality control is required.

Examples of use are as follows:

  • Water quality control when drinking water is used as a raw material in food processes
  • Pumping stations and distribution plants on the water pipeline network
  • All process management of water treatment plants
  • Management of plant and industrial water facilities (cooling water and drinking water)
  • Water quality management of large boilers
  • Deodorization equipment for human waste, sewage treatment plants, meat plants, etc.
  • Principle of residual chlorine meter

There are three methods for measuring residual chlorine: the iodine titration method, the colorimetric DPD method, and the DPD absorbance spectrophotometric method, which uses reagents.

The polarograph method is a reagent-free method that measures conductivity by passing a weak electric current through a sensor using a precious metal electrode.

The iodometric titration method adds potassium iodide solution at a pH of 4 or less, after which the free and bound chlorine is replaced by iodine.

The reagent type method is used to measure total residual chlorine. The reagent form is used for process control in water purification plants.

The colorimetric DPD method and the DPD absorbance spectrophotometric method are:

  1. The DPD indicator is added to a sample and is oxidized by chlorine, resulting in a magenta coloration. The measurement is made by comparing the degree of coloration and reading the numerical value engraved on the colorimetric plate. This is the simplest method that can be easily performed at the measurement site.
  2. Residual chlorine meters using the polarograph method are made by applying a voltage of -0.4 V between a small rotating platinum electrode immersed in the sample and a stationary platinum electrode with a relatively large surface area.
  3. When a voltage of -0.4 V is applied between a small rotating platinum electrode immersed in the sample and a stationary platinum electrode with a relatively large area. Concentration polarization occurs on the surface of the rotating platinum electrode, and with a diffusion current corresponding to the amount of residual chlorine flows, the conductivity is expressed numerically.

List of 10 Residual Chlorine Meter Manufacturers

*Including some distributors, etc.

Sort by Features

  • Default
  • Company Size: largest first
  • Year Founded: oldest first
  • Year Founded: earliest first

Sort by Area

  • China
  • Japan
  • Malaysia
    • HORIBA
      • Japan Address: 2Miyanohigashi, Kisshoin, Minami-ku, Kyoto, Japan

      Manufacturer Overview

      HORIBA RADIO LABORATORY was established in Japan in 1945 and has spent the last three-quarters of a century growing as an R&D company and engaged in international operations. HORIBA Scientific offers 200 years of experience developing high-performance scientific instruments and analytical solutions. The HORIBA Group of worldwide companies provides an extensive array of instruments and systems for applications ranging from automotive R&D, process and environmental monitoring, in-vitro medical diagnostics, semiconductor manufacturing, and metrology to a broad range of scientific R&D and QC measurements. Operating in Asia, Europe, and North and South America, HORIBA scientific develops solutions that go beyond just products.

    • Shanghai BOQU Instrument Co.,Ltd
      • China Address: No. 118 Xiuyan Road, Pudong New Area, Shanghai, China

      Manufacturer Overview

      Shanghai BOQU Instrument Co.,Ltd (SBI) is a Chinese manufacturer of water testing and analysis instruments that was established in 2007 in Pudong, Shanghai. The company produces various water sensors and quality analyzers, such as biochemical oxygen demand (BOD), chemical oxygen demand (COD), silica, and ammonia nitrogen (NH3-N) analyzers. It also offers a range of meters, including residual chlorine, total suspended solids (TSS) and dissolved oxygen meters. SBI products are mainly used by clients in the marine, life sciences, wastewater processing, and biotechnology sectors.

    • Zhejiang Lohand Environment Technology Co.,Ltd.
      • China Address: Room 201, 2nd Floor, Building 7, 63 Jiuhuan Road, Shangcheng District, Hangzhou City, Zhejiang, China

      Manufacturer Overview

      Hangzhou Lohand Biological Co.,Ltd., founded in 2008 with facilities in China, is a manufacturer of laboratory instruments and equipment. The company's products include water test paper, water test kits, color comparison tubes, and industrial online meters. Lohand’s products are used for rapid testing of water quality in water supply systems, food and beverage processing, environmental detection, and water treatment projects in agriculture, sewage plants, scientific research, biotechnology, and textile industries. Hangzhou Lohand Biological Co.,Ltd. also provides custom design and production of equipment and systems to meet client requirements.

    • Shandong Renke Control Technology Co.,Ltd.
      • China Address: High - Tech Zone, Jinan, Shandong, China

      Manufacturer Overview

      Headquartered in Shandong, China, Shandong Renke Control Technology Co., Ltd. is an Original Equipment Manufacturer (OEM) specializing in environmental monitoring technology. Renke has developed a cloud platform that analyzes data collected from diverse environmental sources, including water quality and warehouse security. This platform enables the company to offer a wide range of applications and data-driven solutions across multiple industries. Renke also provides technical support, including field installation, sensor calibration, and automatic control. The company has achieved, among others, the ISO 9001 certification and product certification from the National Institute of Metrology.

    • Oxidation Technologies, LLC.

      Manufacturer Overview

      Oxidation Technologies, LLC., established in 2014 and headquartered in Inwood, Iowa, USA, is a manufacturer specializing in ozone systems, ozone generators, and associated ozone-related accessories. The company specializes as a system integrator in utilizing ozone for oxidation purposes, offering integrated ozone systems along with H2O2 or UV systems to deliver Advanced Oxidation Process (AOP) Solutions. The company provides engineering services, consulting, and basic guidance on the application of ozone. It also offers services for maintenance, repairs, and servicing of these systems.

    • SIBATA SCIENTIFIC TECHNOLOGY LTD

      • SIBATA SCIENTIFIC TECHNOLOGY LTD
        AOAC(JIS)

      • Japan Address: 1-1-62, Nakane, Soka, Saitama, Japan

      Company Overview

      Sibata Scientific Technology Ltd, founded in 1921 at Saitama, Japan is a manufacturer of environmental measurement and occupational health measurement equipment. The company with global clientele produces various scientific measurement and analysis equipment that can range from lab glassware to synthetic reactors. The products line comprise of general lab equipment, extractor, synthetic reactor, Rotary Evaporator and Glass tube oven. These products are used in applications such as occupational safety, food hygiene, water hygiene, hospital and chemical plants as well. The products are ideal for testing quality, measuring dust, precise heating & cooling, personal exposure measurements and many more with more reliability.

    • Analyticon

      Company Overview

      Analyticon Instruments Corporation is a distributor of process monitors, laboratory meters, and analytical instruments located in Springfield, New Jersey. Established in 1988, the company primarily stocks products from Japanese manufacturer DKK-TOA Corporation, which are distributed exclusively through the Analyticon brand. The company offers a wide range of instruments including automatic titrators, conductivity meters, and pH/ORP transmitters for use in the petroleum, water and wastewater, semiconductors, pharmaceuticals, and electronics industries. Analyticon Instruments Corporation also provides OEM manufacturing services for international partner companies and minor suppliers.

    • Supmea Automation Co.,Ltd

      Company Overview

      Supmea Automation Co. Ltd., founded in 2006 and based in Zhejiang, China, is a manufacturer and supplier of industrial process automation sensors and instruments. Its products include analysis instruments, recorders, pressure transmitters, flowmeters, and other field instruments, serving industries across over 100 countries. Its products are ISO 9001-compliant, and in 2022, its Supmea ULS-B Split Type Ultrasonic Level Transmitter received the Editor's Choice Award at the Control Engineering China Product Awards.

Residual Chlorine Meter Manufacturer Ranking

*Including some distributors, etc.

Derivation Method

The ranking is calculated based on the click share within the residual chlorine meter page as of May 2025. Click share is defined as the total number of clicks for all companies during the period divided by the number of clicks for each company.

Number of Employees

  1. HORIBA: 8,205

Newly Established Company

  1. Zhejiang Lohand Environment Technology Co.,Ltd.: 2008 (17 years ago)
  2. Shanghai BOQU Instrument Co.,Ltd: 2007 (18 years ago)
  3. Supmea Automation Co.,Ltd: 2006 (19 years ago)

Company with a History

  1. SIBATA SCIENTIFIC TECHNOLOGY LTD: 1921 (104 years ago)
  2. HORIBA: 1945 (80 years ago)
  3. Analyticon: 1988 (37 years ago)

Global Distribution of Residual Chlorine Meter Manufacturers by Country

*Including some distributors, etc.

Country Number of Companies Share (%)
China China 3 50.0%
Japan Japan 2 33.3%
Malaysia Malaysia 1 16.7%

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List of Residual Chlorine Meter Products

102 products found

102 products

Other water quality instruments Residual chlorine meter ECLG-35/ECLI-35-Ebara Jitsugyo Co., Ltd.

Ebara Jitsugyo Co., Ltd.

Other water quality instruments Residual chlorine meter ECLG-35/ECLI-35

180+ people viewing

Last viewed: 7 hours ago

This device is a reagent-free residual chlorine meter that uses a 3-electrode polarographic method to measure residual chlorine in water. ■Feature...


Residual chlorine meter High concentration effective chlorine meter RC-3F-Yagyu Shokai Co., Ltd.

Yagyu Shokai Co., Ltd.

Residual chlorine meter High concentration effective chlorine meter RC-3F

170+ people viewing

Last viewed: 17 hours ago

■Features Easy to operate with just two keys.


Residual chlorine meter EW-520-Yagyu Shokai Co., Ltd.

Yagyu Shokai Co., Ltd.

Residual chlorine meter EW-520

200+ people viewing

Last viewed: 1 hour ago

■Features -Uses a flat electrode that is easy to clean. ・Low-cost measurement is possible because no reagent is required during measurement (reage...


Residual chlorine meter Chlorine ion meter CL-10Z-Yagyu Shokai Co., Ltd.

Yagyu Shokai Co., Ltd.

Residual chlorine meter Chlorine ion meter CL-10Z

200+ people viewing

Last viewed: 12 hours ago

■Features In mV mode, it is possible to measure the electromotive force of chlorine ion electrodes and judge the quality of the electrodes.


Residual chlorine meter Tap water residual chlorine checker EW-506-Yagyu Shokai Co., Ltd.

Yagyu Shokai Co., Ltd.

Residual chlorine meter Tap water residual chlorine checker EW-506

190+ people viewing

Last viewed: 1 day ago

■Features -Can measure residual chlorine concentration in tap water. -Can be used to manage residual chlorine in cooking facilities, as a guide to ...


Residual chlorine meter Pocket residual chlorine meter DR300-Yagyu Shokai Co., Ltd.

Yagyu Shokai Co., Ltd.

Residual chlorine meter Pocket residual chlorine meter DR300

160+ people viewing

Last viewed: 19 hours ago

■Features - All operations can be performed using three keys, and free chlorine and total chlorine can be measured by selecting reagents. ・Small a...


Residual chlorine meter Free residual chlorine meter-Yagyu Shokai Co., Ltd.

Yagyu Shokai Co., Ltd.

Residual chlorine meter Free residual chlorine meter

150+ people viewing

Last viewed: 1 day ago

■Features - Easy-to-pour package design (beak opening design). ・The "warranty expiration date" is engraved on each package. - Aluminum bag with zi...


Residual chlorine meter FTC-01-Yagyu Shokai Co., Ltd.

Yagyu Shokai Co., Ltd.

Residual chlorine meter FTC-01

170+ people viewing

Last viewed: 1 day ago

■Features - Capable of measuring free residual chlorine and total residual chlorine. - Comes with a memory function that can save and read out 150 ...


Residual chlorine meter Residual chlorine meter (PhotometerCL-2)-Yagyu Shokai Co., Ltd.

Yagyu Shokai Co., Ltd.

Residual chlorine meter Residual chlorine meter (PhotometerCL-2)

220+ people viewing

Last viewed: 5 hours ago

■Features -Resolution is 0.01mg/L, so it can accurately read down to low concentrations. - Red LED display allows measurements even at night or in ...


Residual chlorine meter Digital residual chlorine tester-Yagyu Shokai Co., Ltd.

Yagyu Shokai Co., Ltd.

Residual chlorine meter Digital residual chlorine tester

180+ people viewing

Last viewed: 7 hours ago

■Features ・Measurement items other than general free chlorine are also available. - Comes with a memory function for 99 measured values. *Special ...


Residual chlorine meter Effective for controlling chlorine concentration during chlorine disinfection Digital absorption photometer (Checker HC)-Yagyu Shokai Co., Ltd.

Yagyu Shokai Co., Ltd.

Residual chlorine meter Effective for controlling chlorine concentration during chlorine disinfection Digital absorption photometer (Checker HC)

180+ people viewing

Last viewed: 9 hours ago

■Features -Easy to operate with one button. - Large, easy-to-read display. *It is not waterproof.


Measuring equipment Residual chlorine meter RM series-Takumina Co., Ltd.

Takumina Co., Ltd.

Measuring equipment Residual chlorine meter RM series

560+ people viewing

Last viewed: 7 hours ago

Enables measurement of a wide range of water quality. Compatible with hot spring water and well water.

3 models listed

RM-52-Measuring equipment Residual chlorine meter RM series
RM-52PC-Measuring equipment Residual chlorine meter RM series
RM-55-Measuring equipment Residual chlorine meter RM series

Measuring equipment High concentration residual chlorine meter HM series-Takumina Co., Ltd.

Takumina Co., Ltd.

Measuring equipment High concentration residual chlorine meter HM series

340+ people viewing

Last viewed: 9 hours ago

Stable and continuous measurement of high-concentration residual chlorine (~200mg/L) for HACCP-compliant food factories. Features ■Stable and cont...


Measuring equipment Residual chlorine meter Digital residual chlorine tester DCT-Takumina Co., Ltd.

Takumina Co., Ltd.

Measuring equipment Residual chlorine meter Digital residual chlorine tester DCT

300+ people viewing

Last viewed: 5 hours ago

Accurate measurement with one finger. Wide range of uses with 4 reagents. ■Accurate measurement of free chlorine and total chlorine concentration ...


Measuring equipment Residual chlorine meter DPD residual chlorine tester CLT-10-Takumina Co., Ltd.

Takumina Co., Ltd.

Measuring equipment Residual chlorine meter DPD residual chlorine tester CLT-10

280+ people viewing

Last viewed: 8 hours ago

Accurate and easy residual chlorine measurement using the DPD method, which complies with clean water testing methods. ■Features ・Highly accurate...


Measuring equipment Residual chlorine meter Water tester 2 WT-2-Takumina Co., Ltd.

Takumina Co., Ltd.

Measuring equipment Residual chlorine meter Water tester 2 WT-2

220+ people viewing

Last viewed: 9 hours ago

Easily measure residual chlorine and pH with Mobile Set 7. ■Both residual chlorine and pH can be measured Free residual chlorine is measured using...


Aqua Qualis series waterproofed chlorine meter FTC-1000PE-Custom Co., Ltd.

Custom Co., Ltd.

Aqua Qualis series waterproofed chlorine meter FTC-1000PE

490+ people viewing

Last viewed: 10 hours ago

■ Simultaneous display of free residual chlorine values ​​and temperature. ・ IP67 dustproof, waterproof resistance. ・ The “auto lock function” th...

Price (without tax)

$ 321.75

Remaining chlorine meter FTC-01-Custom Co., Ltd.

Custom Co., Ltd.

Remaining chlorine meter FTC-01

470+ people viewing

It is a product that measures the chlorine concentration that blends into the water. ■ Measurement of free residual chlorine and all residual chlo...

Price (without tax)

$ 391.95

Multi-item water quality meter (s::can) Physical sensor Polarographic electrode type residual chlorine meter chlori::lyser Chlorilizer-Ebara Jitsugyo Co., Ltd.

Ebara Jitsugyo Co., Ltd.

Multi-item water quality meter (s::can) Physical sensor Polarographic electrode type residual chlorine meter chlori::lyser Chlorilizer

140+ people viewing

Last viewed: 2 hours ago

■Summary The physical sensor is a continuous measurement sensor that allows you to add items tailored to the site. By combining it with a control/d...


Portable Digital Residual Chlorine Meter Free Chlorine (LR) / Total Chlorine (LR) / pH / Cyanuric Acid / Iron (LR) / Bromine / Iodine (For Freshwater)-Hanna Instruments JAPAN

Hanna Instruments JAPAN

Portable Digital Residual Chlorine Meter Free Chlorine (LR) / Total Chlorine (LR) / pH / Cyanuric Acid / Iron (LR) / Bromine / Iodine (For Freshwater)

140+ people viewing

Last viewed: 14 hours ago

■Latest spectrophotometer series HI 97101 is a portable digital residual chlorine analyzer. This instrument also allows numerical verification and ...

Price (without tax)

$ 637.00

Portable Digital Residual Chlorine Meter Free Chlorine (LR) /Total Chlorine (LR) /pH/Cyanuric Acid (For Freshwater)-Hanna Instruments JAPAN

Hanna Instruments JAPAN

Portable Digital Residual Chlorine Meter Free Chlorine (LR) /Total Chlorine (LR) /pH/Cyanuric Acid (For Freshwater)

130+ people viewing

Last viewed: 19 hours ago

■Latest spectrophotometer series The HI 97725 is a portable digital residual chlorine meter that can measure low concentrations of free and total c...

Price (without tax)

$ 546.00

Portable Digital Residual Chlorine Meter Free Chlorine (LR) / Total Chlorine (LR) / pH / Iron (LR) / Total Hardness (ULR) (For Freshwater)-Hanna Instruments JAPAN

Hanna Instruments JAPAN

Portable Digital Residual Chlorine Meter Free Chlorine (LR) / Total Chlorine (LR) / pH / Iron (LR) / Total Hardness (ULR) (For Freshwater)

140+ people viewing

Last viewed: 1 hour ago

■Latest spectrophotometer series The HI 97745 is a portable digital residual chlorine meter that measures low concentrations of free and total chlo...

Price (without tax)

$ 559.00

Portable Digital Residual Chlorine/Turbidity Meter/Free Chlorine (LR)/Total Chlorine (LR)/Turbidity/HI 93414-Hanna Instruments JAPAN

Hanna Instruments JAPAN

Portable Digital Residual Chlorine/Turbidity Meter/Free Chlorine (LR)/Total Chlorine (LR)/Turbidity/HI 93414

170+ people viewing

Last viewed: 15 hours ago

■Highly functional device that can measure turbidity and residual chlorine with just this one device Equipped with a state-of-the-art optical syste...

Price (without tax)

$ 1,917.50

Portable Digital Residual Chlorine/Turbidity Meter/Free Chlorine (LR)/Total Chlorine (LR)/Turbidity HI 93414-Hanna Instruments JAPAN

Hanna Instruments JAPAN

Portable Digital Residual Chlorine/Turbidity Meter/Free Chlorine (LR)/Total Chlorine (LR)/Turbidity HI 93414

140+ people viewing

■Highly functional device that can measure turbidity and residual chlorine with just this one device Equipped with a state-of-the-art optical syste...

Price (without tax)

$ 1,917.50

Tabletop Digital Residual Chlorine/Turbidity Meter/Free Chlorine (LR)/Total Chlorine (LR)/Turbidity HI 83414-Hanna Instruments JAPAN

Hanna Instruments JAPAN

Tabletop Digital Residual Chlorine/Turbidity Meter/Free Chlorine (LR)/Total Chlorine (LR)/Turbidity HI 83414

140+ people viewing

■Measure turbidity and residual chlorine with just this one device Equipped with a state-of-the-art optical system and a tungsten light source base...

Price (without tax)

$ 3,575.00

Portable digital residual chlorine meter (low concentration free chlorine) (for freshwater)-Hanna Instruments JAPAN

Hanna Instruments JAPAN

Portable digital residual chlorine meter (low concentration free chlorine) (for freshwater)

110+ people viewing

Last viewed: 1 day ago

■Latest residual chlorine meter series The HI 97701 is a portable digital residual chlorine meter that measures low concentrations of free chlorine...

Price (without tax)

$ 370.50

Disinfectant/deodorizer Simple chlorine amount measuring device Residual chlorine measuring device (DPD method) TK-6948-Takeya Brush Industry Co., Ltd.

Takeya Brush Industry Co., Ltd.

Disinfectant/deodorizer Simple chlorine amount measuring device Residual chlorine measuring device (DPD method) TK-6948

160+ people viewing

Last viewed: 7 hours ago

This method is based on a reaction in which a DPD reagent is added to water containing residual chlorine, which produces a pale reddish-purple colo...


Portable digital residual chlorine meter (low concentration free chlorine/total chlorine) (for freshwater)-Hanna Instruments JAPAN

Hanna Instruments JAPAN

Portable digital residual chlorine meter (low concentration free chlorine/total chlorine) (for freshwater)

100+ people viewing

■Latest residual chlorine meter series The HI 97711 is a portable digital residual chlorine meter that measures low concentrations of free/total ch...

Price (without tax)

$ 390.00

Portable digital residual chlorine meter (high concentration free chlorine/total chlorine)-Hanna Instruments JAPAN

Hanna Instruments JAPAN

Portable digital residual chlorine meter (high concentration free chlorine/total chlorine)

140+ people viewing

Last viewed: 1 day ago

■Latest residual chlorine meter series The HI 97734 is a portable digital residual chlorine meter that can measure high concentrations of free chlo...

Price (without tax)

$ 448.50

Portable digital residual chlorine meter (ultra low concentration)-Hanna Instruments JAPAN

Hanna Instruments JAPAN

Portable digital residual chlorine meter (ultra low concentration)

120+ people viewing

■Latest spectrophotometer series HI 97761 and HI 97762 are portable digital residual chlorine meters for ultra-low concentrations. HI 97761 measure...

Price (without tax)

$ 435.50







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