Works great, but I'd like a little more control, so just looking for a generic box that will read the temp, and open/close a dry contact for my hvac system to work with based on rules in HE. Anybody have a recommendation?
Don't have a device idea offhand, but I am curious how you've done this.
Is the 10K ohm sensor just one of the typical probes like shown on the controller you linked? And that was straight up sunk in the wet concrete, drilled hole in hard concrete, or small tube you set in the wet concrete?
Just askin out of interest in a future application.
10k sensors are pretty standard in the HVAC industry (and elsewhere too). They can be durably sealed or open and finicky. Some can be dropped into a hotwater heater no problem, others, you need to protect from the water. I've done wet set, drilled hole, etc. Small tube won't work unless you use thermal paste (same stuff you'd use between a CPU and a heat fin, etc.) to make a solid contact with the inside of your tube, which should be metal... a plastic tube will rob you of heat transfer, so lags will add up and eventually you're 'chasing readings' that are like the news paper,... outdated by the time you see it. Simple question, but lots of 'depends' in the answer. There's lots of religion about it too depending on your temperment... " don't ever wet set, cause when the sensor goes or the wire breaks, your screwed"... I'm a little more relaxed about it, but it's always a good idea to think about how you would recover from either of those situations.
I think the Fibaro Smart Implant can use a 0-10 volt input. Maybe get a basic puck-type transmitter and the fibaro device. My other thought would be an arduino device using hubduino. That would be wifi though.
