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New Surplus Stock: CCS51D-AA11CJ Endress+Hauser Digital Free Chlorine Disinfection Sensor. Never installed and has never had membrane cover removed. Free USPS Priority Shipping w/ Insurance and Signature Measured values:
Free chlorine (HOCl) Hypochlorous acid (HOCl)
[mg/l, μg/l, ppm, ppb]
Temperature [°C, °F]Measuring ranges:
CCS51D-**11AD CCS51D-**11BF CCS51D-**11CJ 0 to 5 mg/l (ppm) HOCl
0 to 20 mg/l (ppm) HOCl
0 to 200 mg/l (ppm) HOClSignal current:
CCS51D-**11CJ
9 to 18 nA per 1 mg/l (ppm) HOClReference operating conditions:
Temperature 20 °C (68 °F)
pH value pH 5.5 ±0.2
Flow 40 to 60 cm/s
HOCl-free base medium Mains water
12.2.2 Response time
T90 < 25 s (after completing polarization)
The T90 time can be longer under certain conditions. If the sensor is operated or stored in a
chlorine-free medium for a longer period, the sensor response starts immediately if chlorine is
present but only reaches the exact concentration value after a delay.Measured value resolution of sensor:
CCS51D-**11AD 0.03 µg/l (ppb) HOCl
CCS51D-**11BF 0.13 µg/l (ppb) HOCl
CCS51D-**11CJ 1.1 µg/l (ppb) HOCl
