I was told by a professional coffee technician manufacturers experimented with electronic temp sensors 15-20 years ago but they were prone to failure. Field ser

I was told by a professional coffee technician manufacturers experimented with electronic temp sensors 15-20 years ago but they were prone to failure. Field service is expensive. This is for the professional machine ( 2 - 3 groups ). They have always used pressostats which are very reliable but they wear due to arcing. For the home market, lots of machines are not heat-exchangers and therefore need to run a lot cooler ( 100c instead of around 120c ). A pressostat does not work well in this range and they just mount cheap thermostats.