Template Sensor for Maximum Air Quality Index

General
1

I have four air quality sensors in my home, each measuring different pollutants. I wanted to create a sensor that shows the highest value among these sensors to get a clear picture of the worst air quality condition in real-time. After some research and experimentation, I found a solution using a template sensor. Here’s how I set it up:

yaml

  • platform: template
    sensors:
    air_max:
    friendly_name: “Air Quality Maximum”
    value_template: >
    {% set values = [
    states(‘sensor.air_pm_25’).state | int,
    states(‘sensor.air_pm_10’).state | int,
    states(‘sensor.air_co’).state | int,
    states(‘sensor.air_no2’).state | int
    ] %}
    {{ values | max }}

This configuration does the following:

  • Collects the current state values of four air quality sensors.
  • Converts them to integers to ensure proper comparison.
  • Uses the max filter to find the highest value.
  • Displays this maximum value as the state of the air_max sensor.

I also added a friendly name to make it more readable in the UI. Now, I can easily monitor the worst air quality condition in my home with a single glance. This setup has been working perfectly for me, providing real-time insights into my indoor air quality!

If you have similar sensors and want to track the maximum value, give this template sensor a try. It’s a simple yet effective way to consolidate data from multiple sources.