Soil temperature sensor
Soil temperature sensor
(OP)
Could anyone recommend me a reasonable soil temperature sensor, thermistor, thermicouple? I want to measure soil temperatures...
Thanks in advance
Thanks in advance
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RE: Soil temperature sensor
Basically, just about any thermal sensor could work. The housing of it is probably more crucial. I'd take a look at http://www.omega.com/. They have scads of sensors in all sorts of housings, data loggers, et cetera.
Personally, I have an Oregon Scientific indoor/outdoor thermometer with sensors around my house and yard that communicate via RF to a central unit. One of the sensors has a thermistor in a housing on a cable that can be buried in the ground.
RE: Soil temperature sensor
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RE: Soil temperature sensor
Accuracy - within +/-1 degree centigrade
Rate of reading once a day
Number of sensors - for the trial one (after verification much more)
....
I want to measure the soil temperature say at a depth of 1 m everyday with an accuracy of 1 deg. centig.
RE: Soil temperature sensor
Keith Cress
Flamin Systems, Inc.- http://www.flaminsystems.com
RE: Soil temperature sensor
RE: Soil temperature sensor
RE: Soil temperature sensor
The temperature measuring points are in a fixed location. For the time being I want to have it in a manual reading manner.
RE: Soil temperature sensor
RE: Soil temperature sensor
Keith Cress
Flamin Systems, Inc.- http://www.flaminsystems.com
RE: Soil temperature sensor
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Sometimes I only open my mouth to swap feet...
RE: Soil temperature sensor
Keith Cress
Flamin Systems, Inc.- http://www.flaminsystems.com
RE: Soil temperature sensor
RE: Soil temperature sensor
Shoot, almost anything can be used. I would suggest
PVC sprinker pipe, and/or schedule 125. There are
threaded pipe adaptors with end caps that can be easily
used for this purpose. The circuit board in question is
placed inside the pipe, one end of the the pipe is glue
capped, the other with the treaded adaptor. The wires
through the treaded end cap with silicon water barrier.
Screw the whole thing together and stuff it in the
ground! There might be a time lag between the surrounding
soil and the temperature probe, but not much. Any
temperature rise between the existing electronics and
the outside soil should be negliglable, however, if not,
then the probe outside the pipe.
A quick trip to the hardware store and a tad bit of work
with a drill press or hand drill and you are ready to
rock and roll. Or, perhaps soil and roll?
Cheers,
Rich S.
RE: Soil temperature sensor
The method works well with both metal and plastic glands - for a temperature sensing element a metal (stainless steel) gland would be a good choice with the sensor being potted in a polyester resin. Epoxy would work too, but the low viscosity of polyesters is usually easier to deal with than most epoxies from a practical point of view. Both materials are essentially inert chemically (or you have some really nasty soil conditions!).
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Sometimes I only open my mouth to swap feet...