The aim of this study is the automation of the monitoring and controlling of ammonia concentration in the air of poultry houses by using Smart Relay (SR). Ammonia (NH3) concentration in poultry houses is a production issue of concern, where it is one of the harmful gases that significantly affect the health of birds and growers (through exposing to the high concentration levels of ammonia). The system achieve 24 hours remote monitoring without human intervention through using the communication connection feature of smart relay with the local operator communication networks via its communication interfaces that used along with it in this system. This remote monitoring is achieved through sending and receiving SMS messages from this system to the mobile phone of person in charge of poultry farms and vice versa.