Can I use Air quality sensor v1.2 individually?

I’m planning to make project using Grove Air quality sensor v1.2. And I found following problems

  1. Whenever I measure Vcc and Gnd my tester says it’s connected (which means short circuit?). And i can’t give more than 3v to board. Whenever I increase incoming voltage it drops to 2.1v with current of 1.65A (with strange smell)
  2. I can’t find specific schematics of sensor’s board v1.2.
  3. Is it possible to us sensor without arduino, raspberry or other grove products
  4. And I find elements in board useless except opamplifier, sensor and few components like resistor and capacitors. What is the purpose of having AL480?
    Thank you and have a nice day :slight_smile: