CHWJ series industrial online PH/ORP meter is with the water quality on-line monitoring of the microprocessor controller. The instrument configuration of different types of pH electrode or ORP electrode is widely used in power plants, petrochemical industry, metallurgy, electronics, mining, paper industry, biological fermentation engineering, medicine, food and beverage, environmental protection, water treatment, aquaculture, modern agriculture, and other industries. Of the aqueous solution pH value (pH), ORP (oxidation reduction potential) for continuous monitoring and control value and temperature value.

The main technical parameters
(1) measuring range:

ORP：－1999～＋1999mV； 
Temperature:-5～110.0℃；
(2) the resolution:
pH：0.01pH；ORP：1mV；
Temperature:0.1℃；
(3) the basic error:
pH：±0.1pH；ORP：±5mV；   
Temperature:±0.5℃；

(4) automatic or manual temperature compensation scope: 0 ~ 110 ℃;
(5) stability:

pH:≤0.02pH/24h；ORP: ≤2mV/24h；
(6) the standard current output:
The 0 ~ 10 ma (load resistance < 1.5 K Ω);
4 ~ 20 ma (load resistance < 750 Ω);
(7) two sets of relay control contact:
3A 240VAC，6A 28VDC或120VAC；
(8) instrument power supply:
220 vac plus or minus 10%, 50 + 1 hz, power 3 w or less;
24 VDC power: 1 w or less (optional);
12 VDC power: 1 w or less (optional);
(9) instrument appearance size: 96 * 96 * 130 mm;
(10) instrument installation: in tray (embedded);
Installation hole size: 91 * 91 mm;
(11) meter weight: 0.6 kg;
Instrument working environment (12) :
10 ~ 60 ℃ ambient temperature: -
Relative humidity: no more than 90%;
In addition to the earth's magnetic field around without a strong magnetic field interference.