Digital Residual Chlorine Colorimeters

Portable Residual chlorine colorimeter is widely used in the fields of waterworks,dringking water plant ,sewage plant,river and lake water quality monitoring station,laboratory research ,water treatment project ,agriculuture ,pharmacy ,chemical industry ,metallurgy,smithing,textile dipdye,etc.
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Product Details

digital residual chlorine Colorimeters LH-C01


1. Excellent optical system design, with advanced microprocessor chip

2. Humanized operation interface, simple and convenient

3. Adopting specialized optical colorimetric cuvette, high accurate

4. High accurate silicon photocell sensor and light source



Product name

Portable Residual chlorine colorimeter

Test item

Residual chlorine

Measuring range





Test method

DPD method

Working condition








Light source


Digital Residual Chlorine Colorimeters


Model NO.


Measuring range



Theory of work


Residual chlorine meter





DPD spectrophotometry. Solution with reagent and residual chlorine turns red.


Residual chlorine meter



DPD spectrophotometry. Solution with reagent and residual chlorine turns red.


About Residual Chlorine

Chlorine dioxide is a chemical compound with the formula ClO2. This yellowish-green gas crystallizes as bright orange crystals at −59 °C. As one of several oxides of chlorine, it is a potent and useful oxidizing agent used in water treatment and in bleaching.

 Chlorine is a chemical element with the symbol Cl and atomic number 17. The second-lightest of the halogens, it appears between fluorine and bromine in the periodic table and its properties are mostly intermediate between them. Chlorine is a yellow-green gas at room temperature. It is an extremely reactive element and a strong oxidising agent: among the elements, it has the highest electron affinity and the third-highest electronegativity on the Pauling scale, behind only oxygen and fluorine.

Digital Residual Chlorine Colorimeters


1. chemical engineering

2. water treatment plant

3. water quality monitoring station

4. metallurgy

5. forge

6. the textile and printing and dyeing industry

7. pharmaceutical industry

8. water works

9. agriculture

10. water treatment engineering

11. laboratory

About us

About us

01 Multi-parameter water quality analyzer series

03 Outdoor multiple in one meter

04 COD reactor

05 Multi-parameter portable water quality detector

06 Water sample heating thermostat

07 Fluorescent dissolved oxygen electrode

07 Pen type salinometer

08 Residual chlorine electrode

09 Portable water quality analyzer

11 DO dissolved oxygen meter

12 Digital refractometer

13 Rapid detection series

16 Color comparison tube series


Our policy lasts 30 days. If 30 days have gone by since your purchase, unfortunately we can’t offer you a refund or exchange.

To be eligible for a return, your item must be unused and in the same condition that you received it. It must also be in the original packaging.

To complete your return, we require a receipt or proof of purchase.

There are certain situations where only partial refunds are granted (if applicable)
- The goods has been used.
- Any item not in its original condition, is damaged or missing parts for reasons not due to our error
- Any item that is returned more than 30 days after delivery

Once your return is received and inspected, we will send you an email to notify you that we have received your returned item. We will also notify you of the approval or rejection of your refund.
If you are approved, then your refund will be processed, and a credit will automatically be applied to your credit card or original method of payment, within a certain amount of days.

Sale items
Only regular priced items may be refunded, unfortunately sale items cannot be refunded.

We only replace items if they are defective or damaged. If you need to exchange it for the same item, send us an email at and send your item to:Building 7, NO.63,JIUHUAN ROAD,JIUBAO STREET,HANGZHOU CITY Hangzhou, 310019 Zhejiang province,China.

To return your product, you should mail your product to: Buliding 7,NO.63,JIUHUAN ROAD,JIUBAO STREET,HANGZHOU CITY Hangzhou, 310019 Zhejiang province,China
You will be responsible for paying for your own shipping costs for returning your item. Shipping costs are non-refundable. If you receive a refund, the cost of return shipping will be deducted from your refund.

Depending on where you live, the time it may take for your exchanged product to reach you, may vary.

If you are shipping an item over $75, you should consider using a trackable shipping service or purchasing shipping insurance. We don’t guarantee that we will receive your returned item.

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