Deister: Access Control Reader
The POC (= Proof of Communication) is a unique device that indicates the field strength of an UHF field at any position. POC behaves exactly like a transponder. UHF fields work with very little power – just enough to power up the simple electronics inside the transponder once the transponder is in the readers range.
To measure the received energy and light up a LED on top only works with an additional battery. The electronics of the POC are designed in a way, that it measures the received energy from the UHF field and adds energy from the battery to light up the LED accordingly. What sounds easy is actually a brand new innovation, patent pending, that reduces the set up time by up to 80%.