The heater supply voltage must be controlled, so that the temperature of
the sensor is kept at a nominal temperature of approx. 750°C.
Notes:
If the exhaust gas temperature of 850°C is exceeded, the heater power must
be switched off. In this case the accuracy of the sensor signal is limited.
If the max. gas temperature exceeds 850°C or hexagon temperature exceeds
500°C, the use of a longer thread boss is recommended (see section 9.9).
If the operating temperature is exceeded (within the max. temperature
limits) for more then 10 minute
Цитата е от datasheet-а на lsu4.2