My impression of the Norwegian corentium pro after 4 years of use is negative. I will tell you my experience.
The equipment in theory is very complete, it is light and allows to work with batteries, so it promises good performance.
Software: Acceptable, allows working in the cloud and has improved. It is the best of the equipment.
Sensitivity: Poor, being photodiodes it is lazy and collects few beads, so you have to wait several hours to get a reliable value.
Accuracy: Acceptable, it is not the 7% that the manufacturer says, but it is under 20% after verifying it with a sarad rtm 2200 SG. Airthings calibrates the corentium pro for sale by comparing it with other pro´sthat had been calibrated, this is not a very serious system. Airthings should calibrate the pro’s against professional reference equipment such as Alphaguard, Sarad, Rad7 or similar.
The accuracy of the thermometer or atmospheric pressure or humidity, are not good, it serves for orientation only.
The movement register of the equipment is not good, it is very sensitive, just a vibration is enough to trigger the movement warning.
Resistance: Bad. After 4 years of use the equipment has been damaged. It has always been cared for, has not been used much and has never been dropped. The manufacturer has told me that one of the 4 photodiodes is broken.
After sales service: ABSOLUTE DISASTER. Very kind, but they tell me that the equipment CANNOT BE REPAIRED.
I repeat, these devices cannot be repaired, they must always be replaced. And the manufacturer only offers me the possibility to buy a new one and pay 700 $ + VAT + shipping cost as the solution.
Can’t the broken photodiode be replaced? No. Really? Yes. Unbelievable.
CONCLUSION: A very powerful but very fragile device. I would not recommend it to anyone.
I have another pro that is 2 years old and I’m already afraid it will break.
This is my experience