Sentex is an obsolete access control manufacturer that was part of the Chamberlain Group of companies. Their telephone entry units operated both at 30 and 26 Bit Wiegand protocols. The Sentex access cards, key fobs and transmitters are made in a proprietary 30 Bit Wiegand format. While most Sentex products are obsolete, Global Gate Controls carries several in stock. If you can’t find the Sentex products you’re looking for, please contact our courteous customer service department.