Tophit H CPS471/CPS471D
12
Hauser
Environment
Ambient temperature range
"
Caution!
Danger of frost damage
Do not operate the sensor at temperatures below –15°C (5 °F).
Storage temperature
0 to 50 °C (32 to 120 °F)
Ingress protection
TOP68:
• IP 68 [1 m (3.3 ft) water column, 50 °C (122 °F), 168 h], autoclavable up to 135 °C (275 °F)
Memosens:
• IP 68 (10 m (32.8) ft water column, 25 °C (77 °F), 45 d, 1M KCl), autoclavable up to 135 °C (275 °F)
Sensitivity to light
As every semiconductor the ISFET is light-sensitive (fluctuations of measured value). Avoid direct sunlight
during calibration and operation!
Normal environment light does not influence the measurement.
Process
Medium temperature
depending on pH
At high temperatures over a long period of time, alkalis irreversibly destroy the gate isolator oxide.The sensor
can only be used in the indicated range (
13) at a cost to its life span. If it is constantly subjected to the
effects of a 2% sodium hydroxide solution at 80°C (176 °F), the sensor life span drops to approx. 10-15 hours.
a0003899-en
Fig. 13:
Temperature and pH
Application at low
temperatures
Application range of the sensor according to the order code (see ordering information, product structure)
120
100
80
60
40
20
0
0
2
4
6
8
10
12
14
pH
°C
Restricted
lifetime!
application range
ISFET
248
212
176
140
104
68
32
°F
