# Bodenfeuchtigkeitssensoren
**URL:** https://meta.it-syndikat.org/t/bodenfeuchtigkeitssensoren/184
**Category:** General
**Created:** [June 29, 2016, 12:36pm UTC](https://meta.it-syndikat.org/t/bodenfeuchtigkeitssensoren/184 "2016-06-29T12:36:56Z")
**Posts on this page:** 13
**Page:** 1
### Author:  [@konfusius](https://meta.it-syndikat.org/u/konfusius)
#### Post date: [June 29, 2016, 12:36pm UTC](https://meta.it-syndikat.org/t/bodenfeuchtigkeitssensoren/184/1 "2016-06-29T12:36:56Z")
Wenn man seine Pflanzen überwachen will, brauchen die ja so a Art “bin durstig” Sensor.
Das ist a guter:
> **[Soil Moisture Sensor - VH400](http://www.vegetronix.com/Products/VH400/)**
>
> Capacitive Dielectric Soil moisture sensor
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### Author:  [@konfusius](https://meta.it-syndikat.org/u/konfusius)
#### Post date: [June 29, 2016, 10:41pm UTC](https://meta.it-syndikat.org/t/bodenfeuchtigkeitssensoren/184/2 "2016-06-29T22:41:59Z")
@xumio besser als deine Gipsgefüllten Buchsen fürn Basilikum
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### Author:  [@robelix](https://meta.it-syndikat.org/u/robelix)
#### Post date: [June 30, 2016, 9:03am UTC](https://meta.it-syndikat.org/t/bodenfeuchtigkeitssensoren/184/3 "2016-06-30T09:03:05Z")
Wollte mal die da ausprobieren:
> **[Pollin Electronic GmbH](https://www.pollin.de/)**
>
> Online einkaufen beim Testsieger: "Höchste Kundentreue" nach Focus-Money 2021! Top Marken zu Schnäppchenpreisen, ausgezeichneter Service!
Wahrscheinlich nicht so gut - kosten aber eben nur ein 10tel.
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### Author:  [@wingdu](https://meta.it-syndikat.org/u/wingdu)
#### Post date: [June 30, 2016, 9:24am UTC](https://meta.it-syndikat.org/t/bodenfeuchtigkeitssensoren/184/4 "2016-06-30T09:24:38Z")
Ein bisschen happig der Preis ? Wobei bei mir sterben die Plazen freiwillig!!!
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### Author:  [@lux](https://meta.it-syndikat.org/u/lux)
#### Post date: [July 3, 2016, 10:57pm UTC](https://meta.it-syndikat.org/t/bodenfeuchtigkeitssensoren/184/5 "2016-07-03T22:57:14Z")
Meiner Meinung nach am Besten wär so ein Sensor: [http://www.dietmar-weisser.de/elektronik-projekte/analogtechnik/sensoren/bodenfeuchtesensor.html](http://www.dietmar-weisser.de/elektronik-projekte/analogtechnik/sensoren/bodenfeuchtesensor.html) (~2€ fürs Rohmaterial) Wenn genug Interesse von euch da ist, könnten wir ein paar Platinen bestellen und gemeinsam(evtl als Workshop?) löten. Ich wollte mir eh schon länger sowas wie den Giess-o-mat bauen: [Giess-o-mat – Mikrocontroller.net](https://www.mikrocontroller.net/articles/Giess-o-mat)
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### Author:  [@konfusius](https://meta.it-syndikat.org/u/konfusius)
#### Post date: [July 3, 2016, 11:21pm UTC](https://meta.it-syndikat.org/t/bodenfeuchtigkeitssensoren/184/6 "2016-07-03T23:21:47Z")
@felix-de-waal ping
Kann wer die 20 Zeichen Warnung killen?
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### Author:  [@wingdu](https://meta.it-syndikat.org/u/wingdu)
#### Post date: [July 4, 2016, 3:14pm UTC](https://meta.it-syndikat.org/t/bodenfeuchtigkeitssensoren/184/7 "2016-07-04T15:14:34Z")
Warnungen ? 🙂 Wo was wie ?
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### Author:  [@gwrx](https://meta.it-syndikat.org/u/gwrx)
#### Post date: [July 4, 2016, 7:53pm UTC](https://meta.it-syndikat.org/t/bodenfeuchtigkeitssensoren/184/8 "2016-07-04T19:53:59Z")
done…
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### Author:  [@lux](https://meta.it-syndikat.org/u/lux)
#### Post date: [July 8, 2016, 6:47pm UTC](https://meta.it-syndikat.org/t/bodenfeuchtigkeitssensoren/184/9 "2016-07-08T18:47:15Z")
hätt die sensoren grad gfundn: [Gravity: Arduino Analog Capacitive Soil Moisture Sensor- Corrosion Resistant -DFRobot](http://www.dfrobot.com/index.php?route=product/product&product_id=1385) Würd die nächsten tage ein zwei bestellen. Will sonst noch wer ?@gwrx @robelix @konfusius @xumio @wingdu
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### Author:  [@konfusius](https://meta.it-syndikat.org/u/konfusius)
#### Post date: [July 8, 2016, 7:01pm UTC](https://meta.it-syndikat.org/t/bodenfeuchtigkeitssensoren/184/10 "2016-07-08T19:01:14Z")
3 fürn Space bitte Edit: zusätzlich einen für mich privat.
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### Author:  [@pebbles](https://meta.it-syndikat.org/u/pebbles)
#### Post date: [July 9, 2016, 12:24pm UTC](https://meta.it-syndikat.org/t/bodenfeuchtigkeitssensoren/184/11 "2016-07-09T12:24:16Z")
Hi! für mich bitte 2 stück mitbestellen
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### Author:  [@robelix](https://meta.it-syndikat.org/u/robelix)
#### Post date: [July 15, 2016, 9:12am UTC](https://meta.it-syndikat.org/t/bodenfeuchtigkeitssensoren/184/12 "2016-07-15T09:12:17Z")
schon bestellt? Ansonsten +2
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### Author:  [@konfusius](https://meta.it-syndikat.org/u/konfusius)
#### Post date: [July 27, 2016, 2:49pm UTC](https://meta.it-syndikat.org/t/bodenfeuchtigkeitssensoren/184/13 "2016-07-27T14:49:02Z")
## Emery hat noch was zu den Sensoren geschrieben: All cheap commercial sensors have similar list of deficiencies.
you CAN avoid dissolving anode/cathode quite easily: stainless probes
and alternating polarities. Measure during one polarity of an even
number of switching cycles. The net effect cancels out so that you are only left with rust over time.
-pcb sensors all suffer from two issues:
1: lack of insulation on upper circuitry. SHOULD have conformal coating and then a layer of heat shrink AT LEAST.
2: pcb material is glass epoxy, so SEEMS to be water safe.. but it’s not.
Check
the composition of the FR4 carefully (material datasheet). Many use
paper filler. Via capillary action, FR4 will suck water inside the
board. It will corrode vias, mold, and delaminate. Also, for wet work,
gloss solder mask is preferred over Matt mask.
Often water will form wet pathways over the surface of the board. Gloss mask will release the moisture faster than matt.
All these things lead to conductivity between probes either across the surface (can be acceptable) or internally (destructive).
I’ve had bone dry soil register as “damp” with pcb based sensors.
Best is stainless steel rods, dipped in plastidip (rubber tool coating). Cut
the exposure area (great because you can measure at root level, 20-50
cm deep). Expose only 2-3 cm.
Mount equally distant for all your sensors (2 or 3cm). Mount in plastic blocks
milled and drilled to hold the rods. Thread the end of the rods for
termination. I’ve had good results cutting up plastic kitchen cutting
boards 1cm thick.
These will long outlast the cabling leading to them.
Wood or anything which absorbs water is bad.. false readings. long delay
between wet/dry cycles. lots of bad luck with gypsum sensors. the
dwell between wet and dry can be DAYS for even small sensors. Meanwhile
your plant is turning to dust.
One thing
to remember about soil moisture sensors: they only tell you something
about the soil BETWEEN the probes.. or the pcb between.
So those pcb sensors are only marginally useful for house plants. A pot
about the size of a large coffee cup. They only tell you about the first
3cm of soil. But the part you care about is deep at the roots. Even
large pots, they become useless because no depth.
And finally ;)
Don’t be fooled by long probes. The moisture is the average over the length
of the probe. So.. a probe like a ruler LOOKS cool.. but is very
misleading. Again, you want POINT data, at the root. OR surface data, or
an average. You have to understand what you are measuring to make
determinations. Have to understand your soil.