Manual:
1. Preheating time
Sensor needs some time to reach inside chemical equilibrium so it takes some preheating time. Generally, the
sensor at a relatively high temperature will reach equilibrium faster, so you can boot in the first tens of seconds,
it can give a higher voltage sensor to warm up. For C2H50H working at 50mW, the first 30 seconds use 80mw
heating. In general, the longer the preheating time, the better the accuracy of the sensor.