KROHNE SMARTSENS PH 8150 EN - Manual (Page 29)

TECHNICAL DATA
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SMARTSENS PH 8150
www.krohne.com 11/2013 - 4002543602 - MA SMARTSENS PH 8150 R02 en
The voltage change of a pH sensor at 25°C / 77°F is around -59 mV for each pH unit. This is also
called the slope of the pH sensor. The slope is temperature dependent and decreases over life
time of the sensor.
To compensate for the temperature dependency of the pH measurement, the temperature of the
medium can be measured and automatically compensated.
Figure 6-2: Optimal slope at 25°C / 77°F
Figure 6-3: Temperature dependency of the slope
.book Page 29 Monday, November 18, 2013 11:05 AM