Hi,
i bought a windshield cleaner with ammonia for detecting samples, but
the mq135 show 100+ value of PPM.
How did you mix your ammonia so you know its concentration in PPM ( PARTS PER MILLION) ?
Tom... 
Hi,
i bought a windshield cleaner with ammonia for detecting samples, but
the mq135 show 100+ value of PPM.
How did you mix your ammonia so you know its concentration in PPM ( PARTS PER MILLION) ?
Tom...