For optimal detection reliability and preventing unwanted alarms, the alarm threshold (the minimal temperature that causes an alarm) can be configured. You can even have different alarm thresholds for e.g. working days and the weekend, or work hours and off hours. If there are no people present, you’ll be better off with a low alarm threshold. After all, there is no-one present to undertake any action. You can also configure the camera to only generate an alarm if the alarm threshold is measures for a preset period of time. This will prevent the heat from a passing bulldozer exhaust from triggering an alarm.
To prevent alarms from the heat of trucks that are (un)loading outside standard work hours, a push button can be installed at the location’s overhead door; allowing the drivers to temporarily override the system.