You have indicated that you are looking for protection for a lone worker in the form of an emergency button that also has a tip-over sensor. In this case we recommend the Firecom Guard. This is also ATEX certified. This is a mobile transmitter that has an emergency button for quick alarms and also registers whether the user is still standing or sitting 'upright'. If the user falls or becomes unwell, the Firecom Guard will call 3 telephone numbers itself.