Don't know what a standard sensor is. I asked about humidity and that part number was suggested. Was told it should be about 20 bucks. I paid a little more. What's your suggestion? I'm just bluntering through the dark, here.
I'll give you a laugh. For the next part, a fluid level indicator made with the pot from a game controller, a ping pong ball, and a piece of piano wire.
Greenhouse and now hydroponics. There was no automation before the Brain. I'm in over my head! - I do graphics. My skin has working thermometers, sweeps, and graphs the history, but it's dumb. The last programming I did was Pascal! Configurator build the system, now I need logic. I have bought 3 books on xml and all are geared to the web or databases, not much help. I need reference materials or examples that'll help with conditional statements and looping in the brain.
I got Radio Shack digital, which was unresponsive, until I cut the back out and exposed the sensor. Both exposed to moving air, were very sensative. I sampled for an hour, they trend the same, mine showing 10% lower. Since I'm concerned about the trend, I'm a happy camper.