connecting gas analyzer to arduino

Hello there,

I'm busy with a project where I want to import a signal(0V to 5V dc) out of a gas analyzer to one of the analogue inputs of the arduino. My question is: Can I directly insert the output cable of the gas analyzer to the analogue input of the arduino or do I have to make use of resistors or optoisolators or such?

Hopefully someone can help me this (probably simple) question?

thanks in advance

Tjerk Stoop

If it's 0 - 5v that should work fine. What you will read on the input is 0 - 1023, scale that.

What does that need for a power supply voltage?

Power the device, tie it's ground to the arduino ground and feed the output to an analog input. Readings should be 0 - 1023 if the device puts out a full 0 - 5 volt scale.