Our farm alarm systems work in a similar way to a modern house alarm but they have been fine tuned to work well on farms. For example, everything is waterproof and dust proof, the sensors are selected to ensure that, even though they are often situated outside, false alarms are kept to the absolute minimum. On top of that the alarm reports to your mobile phone through which you can fully control it. (turn it on & off, see the alarm status, check logs etc).