# Doorway Compatibility
The sensor is designed to operate in indoor conditions for standard doorways that allows frequent ingress and egress. The sensor may be top-mounted on door frames that are up to 8ft (2.4m) wide and 12ft (3.6m) tall.
### Where is the sensor mounted?
The sensor must be mounted directly on the doorframe on the inside of the space. In a retail environment, it must be visible from inside the store.
### Can I mount the sensor on a ceiling?
We strongly recommend the installation of the sensor on a door frame due to height, width and traffic requirements. Under exceptional circumstances, ceiling mounting is allowed using an optional ceiling mount adapter which can be supplied by Dor team.
### What if my door is taller than 12ft?
Due to the nature of the thermal technology, accuracy degrades substantially when the sensor is further away from average human height.
### Can I install multiple sensors on a wide doorway?
We do not recommend installing sensors on doorways that are wider than 8ft. Installing multiple sensors on the same doorway may degrade the accuracy of foot traffic data.
### Can I install the sensor on elevator door frames?
Due to individuals entering or leaving an elevator in a dense group at the same time, the sensor's accuracy may suffer. Instead, we recommend that sensors are deployed in doorways leading to elevator banks where possible.
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