Chlorine dioxide is an emerging and excellent water disinfectant that has been increasingly used in the field of drinking water disinfection. However, chlorine dioxide disinfection also has a disadvantage: improper control can cause excessive levels of disinfection by-products such as chlorite. According to relevant data from the Ministry of Health, long-term exposure to excessive levels of chlorite may cause red blood cell damage in humans. Therefore, the national drinking water hygiene standard GB/5749-2006 has specially added a control indicator for chlorite, requiring that the residual amount of chlorite in water disinfected with chlorine dioxide should not exceed 0.7mg/L.

The Shenzhen Qingshijie Q-CL501A portable chlorine dioxide dual parameter analyzer is a water quality analyzer capable of detecting chlorite. The functions and performance of the instrument surpass those of similar domestic and even imported products. It uses the classic disinfectant detection method - DPD spectrophotometry, which can detect the residual amount of new disinfectants such as chlorine dioxide, as well as the disinfection byproduct of chlorine dioxide - chlorite; It can not only meet the detection and control of chlorite in water plants, but also provide guarantee for the safety system of drinking water!

Technical Specifications
Test item: Chlorine dioxide chlorite
Detection method: DPD spectrophotometric method
Reading scale: 0.01mg/L
Range: Chlorine dioxide 0.02~10.00mg/L Chlorite 0.00~2.00mg/L
Precision: Full range average deviation ≤ 3% ± 0.01
Instrument size: 16 × 6.2 × 3cm
Instrument weight: 0.15kg
Power supply: 2 AA alkaline batteries

Features
1. Introducing American technology, conducting independent research and development, and obtaining three patented technologies;
2. It is completely consistent with the on-site method of the national standard GB/T5750-2006 and is a supporting analytical instrument for the new national standard;
3. Portable design for easy on-site inspection;
4. Adopting a super sealed stable structure, the shell protection level meets the IP54 requirements specified in GB4208-1993, ensuring measurement accuracy in harsh environments;
5. High tech technology that can quickly and accurately complete the detection of all 5 items such as free chlorine dioxide and chlorite within 10 minutes and obtain resultsWater Quality Analyzer.

Instrument performance:
1. Adopting microprocessing technology and high reliability integrated circuits to ensure the long-lasting reliability of the instrument;
2. Adopting a super sealed stable structure, the shell protection level meets the IP54 requirements specified in GB4208-1993, ensuring measurement accuracy in harsh environments;
3. Pre store high-precision full mathematical simulation working curves to ensure reliable direct reading results;

Scope of application
It can be widely used for on-site rapid water quality testing or laboratory standard testing (detecting chlorine dioxide and chlorite) in urban water supply, food and beverage, environment, medical, chemical, pharmaceutical, thermoelectric, papermaking, aquaculture, biotechnology, fermentation process, textile printing and dyeing, petrochemical, water treatment and other fields.