https://www.growtent.eu/product-eng-2276-Miernik-EC-Temp-Adwa-AD35-EC-Tester.html
Miernik EC/Temp Adwa AD35 EC Tester | Equipment \ Meters & Testers \ Adwa | GrowTent.pl
tester equipmentmiernikectempadwa
https://www.golbornevintageradio.co.uk/forum/showthread.php?tid=4138
AD35 Battery.
battery