Residual Chlorine Probe

Lohand Biological online residual chlorine electrode consists of cathode and anode,cathode is gold electrode,anode is silver/silver chloride electrode,cathode and anode are immersed in electrolyte chamber filled with electrolyte,through film and measurement environment isolation,film can prevent electrolyte leakage or contaminant infiltration,but hypochlorous acid can pass through the film,the measured hypochlorous acid concentration and the measured current proportional relationship,through pH compensation,to obtain the residual chlorine concentration.
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Product Details

 Residual Chlorine Probe

Residual Chlorine Probe


Measuring   range


Lower   limit


Ph   range





0.05mg/L   or 5% larger as the standard

Respinse   time


Velocity   of flow


Residual Chlorine Probe


Residual Chlorine Probe

Residual Chlorine Probe


Residual Chlorine Probe

Residual Chlorine Probe

Our company

Founded in 2008, Hangzhou Lohand Biological Technology Co., Ltd. Is a company that designs, develops, produces and sells water quality rapid test strips, reagents and precision testing instruments. It is located in Jianggan Science and Technology Park and relies on Zhejiang University Food Science and Technology Park and the West lake Science and Technology Park, focusing on technological innovation, has obtained a number of patents and produces provide customers with professional, fast, affordable and simple testing products and services to create a new history of water quality monitoring.

In the course of ten years of development, we have been constantly working hard in this field, and constantly improving product functions, testing accuracy, dedicating to environmental water quality monitoring and rapid monitoring of product development. The products developed and produced mainly include COD, ammonia nitrogen, total phosphorus, total ammonia integrated machine, miniature COD reactor, water quality monitoring electrode, digital refractometer, etc. Most of the company’s products have obtained CE certification; widely used in domestic environmental protection bureaus, industrial enterprises, university research institutes, food manufacturing enterprises; especially electrochemical testing products have been sold at domestic and foreign.

We sincerely welcome domestic and foreign merchants to achieve win-win cooperation, common development and create brilliant!

Anti-COVID-19 products on sale

Best sellers during worldwide COVID-19 outbreaks.

Especially for medical institutions.


Based on the information from WHO, the virus that causes COVID-19 survives 2 hours to 9 days in groundwater or contaminated drinking water. Wastewater treatment could be possible to cut the route of transmission of the COVID-19 virus. Therefore, sewage contains residual chlorine from disinfection process should be monitored. A survey shows the virus has been inactivated and the safety of groundwater and drinking-water could be ensured when the range of residual chlorine from wastewater tested as 6.5-10mg/L.   

During the COVID-19 outbreak in China, as an expert in water testing area,Lohand supplies thousands of residual chlorine analyzers to the customers, especially for medical institutions.  

Product Name

Quantity Sold

Residual Chlorine Test Strip 0-10ppm


Residual Chlorine Analyzer 0-10ppm


Residual Chlorine Kit


Table 1. List of best sellers during COVID-19 outbreak in China

Currently since the outbreak is under control in China, Lohand has the capacity to meet all the demands on residual chlorine analyzers in this period of time. Lohand hope to work together with the international community in dealing with the challenge of the novel pneumonia pandemic.


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