Install Pro Alarm Electric Fault Indicator. nVent NUHEAT Install Pro Alarm (AC0200) is an electrical fault indicator that simultaneously monitors the hot, neutral and ground wires during installation of any line voltage floor heating system. If a wire is damaged during installation, the Install Pro Alarm will sound an alert, prompting the installer to stop and correct the problem before continuing. AC0200 replaces the Mat Sense Pro (AC0100) and offers several improvements. Louder alarm tone. Longer operating time. More easily replaceable 9V battery (included) Use an Install Pro Alarm with every installation to ensure the system is installed without undetected damage.