YL-1AZ Portable residual chlorine meterDetailed product description：

One Purpose:
The YL-1AZ portable residual chlorine meter is suitable for detecting residual chlorine concentration in domestic or industrial water used in large, medium, and small water plants, industrial and mining enterprises, swimming pools, and other places, in order to control the residual chlorine in water to meet the specified water quality standards.

II Principle:
This instrument applies the principle of microcomputer photoelectron colorimetric detection to replace the traditional visual colorimetric method. Eliminating human error, the measurement resolution is greatly improved. When measuring, when the tested water sample is placed in tetramethylbenzidine or ortho toluidine reagent, the water sample will turn yellow. Then place this water sample into a photoelectric colorimetric stand, and the instrument will compare the depth of yellow to determine the concentration of residual chlorine.

III Technical indicators:
1. Measurement range: 0-2.5mg/L
2. Power supply voltage: DC9V
3. Resolution: 0.01mg/L
4. Repeatability: 1%
5. Linear error: ± (5% FS+1 word)

4 Features:
1. Microcomputer and touch keyboard are easy to use.
2. It can automatically zero and calibrate from 1 to 5 points.
3. High performance lithium battery, can be used continuously for 4 hours after 2 hours of charging, ready to use.
4. This instrument adopts a unique constant light source with stable performance. The water sample can be read by adding reagents, and the residual chlorine value is displayed digitally.
5. The light source has a long service life. This instrument uses a unique semiconductor emitter (patent application number 99226785.2),
Its light source lifespan is several orders of magnitude longer than incandescent lamps (about 350 hours), about tens of thousands of hours.
6. High resolution. The instrument resolution reaches 0.01mg/L.