> For the complete documentation index, see [llms.txt](https://docs.occuspace.io/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.occuspace.io/glossary.md).

# Glossary

### Sensor

Occuspace sensors collect signal activity data. Every sensor has an associated ID on the back, which you will use during installation. 

<figure><img src="/files/oIZIQjiVyi0IUb9a6qqI" alt="" width="375"><figcaption></figcaption></figure>

### Sensor Placement

A sensor placement refers to where a sensor is placed within a zone. This is mapped to a physical location, usually denoted by a label like "1A" on marked-up floorplans.

![The boxes outlined in red are sensor placements](/files/70jNku0CZtt2uWsEMl87)

### Zones

A zone refers to the physical spaces where we return data for. In the picture below, there are two zones -- West Area & East Area.&#x20;

![](/files/dzdy5Bq7X3eo2ducCaEb)