QL201 Free Chlorine Meter measures the free chlorine content in water and wastewater precisely. The meter's measuring method is based on the principle of the reaction between free chlorine and the DPD reagent causes a pink tint in the sample. Using the DPD reagent is more safely, higher sensitivity, more indissoluble and better accuracy than the carcinogenic benzidine reagent used before. The meter are widely used on the free chlorine measuring of water works, environmental monitor, prevention of epidemics, scientific pursuits, swimming pool and so on.

Specifications:

Range:                   0.00 to 2.50mg/L
Resolution:              0.01mg/L
Method:                  Based on the principle of the reaction between free                          chlorine and the DPD reagent causes a pink tint in                          the sample
Response time:           Less than 10 second
Power:                   9V transformer or 3×1.5V battery
Calibration solution:    Potassium permanganate