Updating language for readability (home-assistant#3796)

dpeet · fabaff · commit ca52e23e4cfc · 2017-10-27T08:11:51.000+02:00
* Updating language for readability

* Remove space
diff --git a/source/_components/binary_sensor.markdown b/source/_components/binary_sensor.markdown
@@ -9,9 +9,7 @@ sharing: true
 footer: true
 ---
 
-Binary sensors gather information about state of switches, contacts, pins, and alike. The return value of those sensors is usually digital (1/0). This means that those sensors knows only two states: **0/off/low/closed/false** and **1/on/high/open/true**.
-
-Knowing that there are only two states allows Home Assistant to represent these sensors in a better way in the frontend according to their functionality.
+Binary sensors gather information about the state of devices which have a "digital" return value (either 1 or 0). These can be switches, contacts, pins, etc. These sensors only have two states: **0/off/low/closed/false** and **1/on/high/open/true**.  Knowing that there are only two states allows Home Assistant to represent these sensors in a better way in the frontend according to their functionality.
 
 The way these sensors are displayed in the frontend can be modified in the [customize section](/getting-started/customizing-devices/). The following device classes are supported for binary sensors:
 
