Hi, can the analog Infra red sensor work through the digital 5A relay to control a Solenoid valve?

What is the refresh rate of this sensor ?

Well, rotating the potentiometer to change the distance of the sensor, what else do you need to know ?

HI,
Can I use this sensor in dangerous areas like as famable gases areas?

the sensor wotks perfectly on aurdino - but for the sme logic in c its not ! the problem is that the gpio pin wont turn on ...
why is that hepning ? what can i do to detect it right ?

How can i adjust the distance range? i want to detect proximity of 15 cm but it is set on 30 cm, How can i change that?

Can this work with 3.3V?

You can use ultrasonic sensor which is not harm to human eyes. https://www.dfrobot.com/sea...

Is there a CAD model of this that I could use? And how is it mounted?

It should work, it's just a digital sensor that give high or low level signal.