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Any suggestions about "data loggers"? I'd like something that takes temperature to within 0.1 C in say, 6 places at a time, maybe every 15 minutes and store the numbers. A separate thing would have 2 each of temp and humidity probes and it'll be for the system that transfers heat from the air to the soil.
I'm in the process of building this experimental greenhouse. It's 8 ft 10 in by 12 ft. To conform with our bylaws. It will be used for growing vegetables and testing several heat sink, water saving and moisture and heat recovery systems and recirculating water systems. I'll be buying data loggers to keep the results real and honest. Brian. Dec 14 2020
Experimental Greenhouse, Automatic Watering, With Heatsink, Community Input Needed. View Instructable »
I just tried "hugelkultur" by burying about a truck load of small branches and rose prunings under the ground in a trench. I simply used the shears to break the branches into about 6 inch (15 cm) pieces and as I cut, the pile subsided and after about 20 minutes, it fit in the hole. Its about 15 minutes drive to the municipal composting center, so I saved about 1 and a half hours (loading, unloading and driving time) with the shears in the trench. As far as I know, it will break down gradually and release its phosphates and potash slowly to the plant roots.
Trompe and airlift pump model for schoolsView Instructable »
Lowest I have ever used is about 3.5 inches going to about 5 ft high. First time it worked was an accident and I could not replicate it for about 2 weeks. I forget what I call the design. constriction airlift or something like that. To get super low submergence working high lift, you have to have the constriction and you need to be using 3/16 inch tubing. I find that this is not really useful for anything. Just a good proof of concept! I got about 22 to 1 lift to submergence ratio. I think the limit with 3/16 tubing is about 27 to 1. I did a video of it and I will add the link in a reply.
I will just see if the video link goes in. Anyways, that video is the first time I did really high lift to submergence ratio. https://www.youtube.com/watch?v=lSBBL37JT1I
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