Hanna HI96761 Chlorine, Total Low Range, Portable Photometer

Range: 0.000 to 0.500mg/L
Resolution: 0.001 mg/L
Accuracy: ±0.020 mg/L ±3% of reading @ 25°C
Light Source: Tungsten lamp
Light Detector: Silicon photocell with narrow band interference filter @ 525nm
Power Supply: 9V battery
Auto-off: After 10 minutes of non-use in measurement mode; After 1 hour of non-use in calibration mode; with last reading reminder.
Environment: 0 to 50°C (32 to 122°F); RH max 95% non-condensing
Dimensions: 192 x 104 x 69 mm (7.6 x 4.1 x 2.7")
Weight: 360 g (12.7 oz.)
Method: Adaptation of the Standard Method 4500-Cl G.