Folks, Cheeky use of your brainpower here. I am looking to use a General Input Unit to handle external temperature, humidity and light sensors. The sensors I am looking at come in both 0-10v and 4-20mA variants. What decision process should I go through to make the best choice? I assume that cable length will be a factor - I am expecting a maximum of five metres. If anyone wants to see the sensors, they are at [URL="http://www.titanproducts.com"]www.titanproducts.com[/URL] - and I would welcome any advice on alternatives if anyone has experience. All thoughts welcome. Thanks in advance, Nick