Inject the water sample into the digestion tank through a syringe pump, and then inject the acidic agent; the mixed solution is heated and digested to convert the lead of different valence states into divalent lead; inject the chromogenic agent, and after the reaction, the total lead content is determined according to the shade of the color developed at the specified wavelength.

Characteristics:

l Valve components selection. It can select the reagent sampling sequence, with flexible channels, variable functions, minimum dead volume, easy maintenance, long service life and other advantages.

l Printing function. It can be connected to a printer (optional order) to print the measured data in time.

l It adopts 7-inch touch screen, with simple operation interface, easy for users to learn, operate, and maintain.

l Super large data storage capacity. It can realize storage of historical data for no less than 5 years (measurement interval is 1 time/1h), which greatly meets the needs of customers.

l Automatic leakage alarm function. When reagent leakage occurs, the instrument will automatically alarm to remind the user to perform maintenance.

l Light signal recognition function to ensure high accuracy of quantification.

l Simple and convenient chemical reagents maintenance. The reagents can be replaced once a month, which greatly reduces the maintenance of the user.

l U disk one-click upgrade. The software update is much easier.

1 Method basis: spectrophotometric detection.

2 Measuring range: 0.005-5 mg/L

3 Accuracy: no more than ±10% or no more than ±0.02mg/L.

4 Repeatability: no more than ±5% or no more than ±0.02mg/L.

5 Measurement period: The minimum measurement period is 20 minutes. According to the on-site environment, the color development time can be arbitrarily modified within 5 to 120 minutes.

6 Sampling cycle: time interval (10～9999min arbitrarily adjustable) and hourly measurement mode.

7 Calibration cycle: adjustable at any interval any time from 1 to 99 days.

8 Maintenance cycle: generally, once a month, each time is about 30 minutes.

9 Reagent consumption: less than 0.50 RMB/sample.

10 Output: 2 channels of RS-232; 1 channel of 4-20mA.

11 Environment requirements: indoor with adjustable temperature, recommended temperature +5～28℃; humidity ≤90% (no condensation).

12 Power supply: AC220±10%V, 50±10%Hz, 5A.