CXNS-70 Chlorine sensor
·Application
It can online monitor the residual chlorine concentration for the drink water ,water disinfection in industrial process . It can also used in the swimming pools where the place need to measure the residual chlorine concentration.
·Measuring principle
CXNS-70 type oxygen electrode is a diaphragm polarographic (clark) sensor . It is  consisted of cathode , anode , electrolyte and a layer of gas permeability diaphragm on the cathode . The measured residual chlorine diffuse to the cathode through diaphragm .The proper polarization voltage between the cathode and the anode ,which can deoxidize the residual chlorine on the cathode . These chemical actions proportional to the residual chlorine which is in the measured medium .·Feature
★  Sensitive response ,good stability
★  Do not need to replace the diaphragm and the electrolyte .
★  Suitable for variety of waste water , the diaphragm is difficult to be damaged, anti-pollution .
·Technical parameters

Measurement：	HOCl/residual chlorine	Minim HOCl/residual chlorine
Range：	0.05～20ppmHOCl	0.01～5ppm
Polarization time：	First time 30min	First time 90min
	Second time 10min	Second time 45min

Response time ：90%﹤2min（room temperature ），95%﹤5min（room temperature）
Operating temperature：2～45℃
Min velocity：200～250ml/min，flow-through flow can not less than 30L/h
pH range：4～8.2pH
Proof pressure range：0～1bar
Temperature compensation: Thermal resistance value can be customize by the requests .
Electrode cable :3m high impedance and low noise shielded cable . Electrode size :Diameter 20mm ,length 70mm
Electrode material :316L stainless steel shell ,POM diaphragm cap ,PTFE diaphragm .