Chlorine photometer AL100 measuring range 0.01 to 6.00 mg/l incl. 3 round vials, DPD-reagent tablets and plastic case For free, bound and total chlorine. Internal ring buffer for 16 datasets with real-time clock and date Auto-Off function Countdown function to maintain reaction time Determination of chlorine content using reagent tablets. Measurement of free chlorine using DPD No. 1 Measurement of total chlorine using DPD No. 1 + DPD No. 3 Checking the detection accuracy and reproducibility of measurement results using reference standard kit (please order separately). Technical specifications: Measuring range/resolution 0.01 to 6.00 mg/l Measurement tolerances of DPD reagent tablets 0.00 to 1.00 mg/l: ±0.05 mg/l 1.01 to 2.00 mg/l: ±0.10 mg/l 2.01 to 3.00 mg/l: ±0.20 mg/l 3.01 to 4.00 mg/l: ±0.30 mg/l 4.01 to 6.00 mg/l: ±0.40 mg/l Optics LEDs, interference filter and photosensor Wavelength 530 nm λ= 5 nm Wavelength accuracy ±1 nm Photometric accuracy at 20-25 °C 3 % FS Protection class IP 68 Permissible ambient conditions 5 to 40 °C at 30 to 90 % rel. humidity Dimensions (L x W x H) 155 x 75 x 35 mm Weight (incl. batteries) approx. 260 g Delivery incl. 3 glass round vials with covers, 1 stirring bar, 1 brush, DPD No. 1 + No. 3 reagent tablets, plastic case and 4 type Micro/AAA batteries.