Xylem EXO Series - Ph and ORP

pg | 21
2.9
pH and ORP
Sensor Overview
Users can choose between a pH sensor or a combination pH/ORP sensor to measure these parameters. pH
describes the acid and base characteristics of water. A pH of 7.0 is neutral; values below 7 are acidic; values
above 7 are alkaline. ORP designates the oxidizing-reducing potential of a water sample and is useful for
water which contains a high concentration of redox-active species, such as the salts of many metals and strong
oxidizing (chlorine) and reducing (sulte ion) agents. However, ORP is a non-specic measurement—the
measured potential is reective of a combination of the eects of all the dissolved species in the medium.
Users should be careful not to overinterpret ORP data unless specic information about the site is known.
1.9
Specifications
pH
Units
pH units
Temperature
Operating
Storage
-5 to
+
50°C
0 to 60°C
Range
0 to 14 units
Accuracy
±0.1 pH units within ±10°C
of calibration temperature;
±0.2 pH units for entire temp
range
Response
T63<3 sec
(see pg 12)
Resolution
0.01 units
Sensor Type
Glass combination electrode
ORP
Units
millivolts
Temperature
Operating
Storage
-5 to
+
50°C
0 to 60°C
Range
-999 to +999 mV
Accuracy
±20 mV in Redox standard
solution
Response
T63<5 sec
(see pg 12)
Resolution
0.1 mV
Sensor Type
Platinum button
(continued)
EXOISE1, EXOISE2,
EXOISE5, EXOISE6,
599795, 599797