SHTX humidity/temp sensor
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Posts: 46,084
Hey,
Has anyone messed around with the SHTX sensor from Parallax? I am
looking to buy one, but would like to hear any war stories about the
device before I buy.
Thanks,
Walter
Has anyone messed around with the SHTX sensor from Parallax? I am
looking to buy one, but would like to hear any war stories about the
device before I buy.
Thanks,
Walter
Comments
>Hey,
>Has anyone messed around with the SHTX sensor from Parallax? I am
>looking to buy one, but would like to hear any war stories about the
>device before I buy.
>
>Thanks,
>Walter
Hi Walter -
Here is the experience of one Stamp user who uses it in a commercial
application:
http://www.emesystems.com/OL2sht1x.htm
Regards,
Bruce Bates
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I got one to work, so it can't be too hard. I used the code at Tracy's site.
You can get a free sample, but you have to then mount it on something
yourself. I have had one running for a few months now no problems. But time
will tell if it is able to withstand the real world.
Jonathan
www.madlabs.info
Original Message
From: "walter woodrow" <oopicwow@y...>
To: <basicstamps@yahoogroups.com>
Sent: Friday, May 23, 2003 9:03 PM
Subject: [noparse][[/noparse]basicstamps] SHTX humidity/temp sensor
> Hey,
> Has anyone messed around with the SHTX sensor from Parallax? I am
> looking to buy one, but would like to hear any war stories about the
> device before I buy.
>
> Thanks,
> Walter
>
>
> To UNSUBSCRIBE, just send mail to:
> basicstamps-unsubscribe@yahoogroups.com
> from the same email address that you subscribed. Text in the Subject and
Body of the message will be ignored.
>
>
> Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
>
>
>
>
>
But, sounds easy enough. Thanks for the link.
--- In basicstamps@yahoogroups.com, "Jonathan Peakall"
<jpeakall@m...> wrote:
> Walter,
>
> I got one to work, so it can't be too hard. I used the code at
Tracy's site.
> You can get a free sample, but you have to then mount it on
something
> yourself. I have had one running for a few months now no problems.
But time
> will tell if it is able to withstand the real world.
>
> Jonathan
>
> www.madlabs.info
>
>
Original Message
> From: "walter woodrow" <oopicwow@y...>
> To: <basicstamps@yahoogroups.com>
> Sent: Friday, May 23, 2003 9:03 PM
> Subject: [noparse][[/noparse]basicstamps] SHTX humidity/temp sensor
>
>
> > Hey,
> > Has anyone messed around with the SHTX sensor from Parallax? I am
> > looking to buy one, but would like to hear any war stories about
the
> > device before I buy.
> >
> > Thanks,
> > Walter
> >
> >
> > To UNSUBSCRIBE, just send mail to:
> > basicstamps-unsubscribe@yahoogroups.com
> > from the same email address that you subscribed. Text in the
Subject and
> Body of the message will be ignored.
> >
> >
> > Your use of Yahoo! Groups is subject to
http://docs.yahoo.com/info/terms/
> >
> >
> >
> >
> >
While I have never used the SHTX sensor, I tried a sensor from an obsolete
RS80 Radiosonde which has a module for sensing barometric pressure, relative
humidity and temperature. The T and R.H. sensors respond quickly (i.e.
stabilize within seconds) and the P sensor track very well the changes in
barometric pressure. The only trick is that the sensor produces an audio
output signal with 6 tones corresponding to High and Low references,
T-board, T-ambient and Relative Humidity. I use the basic stamp to decode
the frequency of the output tones and then calculate the values with the
coefficients supplied with the radio sonde.
I paid about $4US the sonde on Ebay. For me most of the fun was figuring out
how to decode the information.
I can send you more information if you are interested
Don
>From: "walter woodrow" <oopicwow@y...>
>Reply-To: basicstamps@yahoogroups.com
>To: basicstamps@yahoogroups.com
>Subject: [noparse][[/noparse]basicstamps] SHTX humidity/temp sensor
>Date: Sat, 24 May 2003 04:03:48 -0000
>
>Hey,
>Has anyone messed around with the SHTX sensor from Parallax? I am
>looking to buy one, but would like to hear any war stories about the
>device before I buy.
>
>Thanks,
>Walter
>
>
>To UNSUBSCRIBE, just send mail to:
> basicstamps-unsubscribe@yahoogroups.com
>from the same email address that you subscribed. Text in the Subject and
>Body of the message will be ignored.
>
>
>Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
>
>
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I will give the SHTX sensor a try first (already have it on order).
I am also looking for a soil moisture sensor. I found on the
Internet where I could use a 555 timer and a special etched PCB. I
also found a vendor called irrometer.com that sells what they call a
watermark sensor. It may have the same type of output as your
radiosonde, but still waiting for them to email the detail. Does the
equipment you have measure soil moisture?
Thanks again,
Walter
--- In basicstamps@yahoogroups.com, "Donald Desaulniers"
<donald_desaulniers@h...> wrote:
> Walter,
>
> While I have never used the SHTX sensor, I tried a sensor from an
obsolete
> RS80 Radiosonde which has a module for sensing barometric pressure,
relative
> humidity and temperature. The T and R.H. sensors respond quickly
(i.e.
> stabilize within seconds) and the P sensor track very well the
changes in
> barometric pressure. The only trick is that the sensor produces an
audio
> output signal with 6 tones corresponding to High and Low
references,
> T-board, T-ambient and Relative Humidity. I use the basic stamp to
decode
> the frequency of the output tones and then calculate the values
with the
> coefficients supplied with the radio sonde.
>
> I paid about $4US the sonde on Ebay. For me most of the fun was
figuring out
> how to decode the information.
>
> I can send you more information if you are interested
>
> Don
>
>
> >From: "walter woodrow" <oopicwow@y...>
> >Reply-To: basicstamps@yahoogroups.com
> >To: basicstamps@yahoogroups.com
> >Subject: [noparse][[/noparse]basicstamps] SHTX humidity/temp sensor
> >Date: Sat, 24 May 2003 04:03:48 -0000
> >
> >Hey,
> >Has anyone messed around with the SHTX sensor from Parallax? I am
> >looking to buy one, but would like to hear any war stories about
the
> >device before I buy.
> >
> >Thanks,
> >Walter
> >
> >
> >To UNSUBSCRIBE, just send mail to:
> > basicstamps-unsubscribe@yahoogroups.com
> >from the same email address that you subscribed. Text in the
Subject and
> >Body of the message will be ignored.
> >
> >
> >Your use of Yahoo! Groups is subject to
http://docs.yahoo.com/info/terms/
> >
> >
>
> _________________________________________________________________
> Help STOP SPAM with the new MSN 8 and get 2 months FREE*
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>Internet where I could use a 555 timer and a special etched PCB. I
>also found a vendor called irrometer.com that sells what they call a
>watermark sensor. It may have the same type of output as your
>radiosonde, but still waiting for them to email the detail. Does the
>equipment you have measure soil moisture?
Radiosondes are usually on balloons, so they are not in a position to
measure soil moisture! (unless done via infrared remote sensing).
The Watermark sensor has an AC resistance that changes in response to
moisture content of the surrounding soil.
http://www.emesystems.com/smx.htm
I have it for sale as a waterproof sealed module, and the circuit is
given there too if you want to try to roll your own.
With regard the the SHTxx, I've used lots of them with very good and
consistent results. Like all absorption hygrometers, they do have
problems at the high end of the range, if they are kept for long
periods (days at a time) at 100%RH.
-- Tracy
Walter
--- In basicstamps@yahoogroups.com, Tracy Allen <tracy@e...> wrote:
> >I am also looking for a soil moisture sensor. I found on the
> >Internet where I could use a 555 timer and a special etched PCB. I
> >also found a vendor called irrometer.com that sells what they call
a
> >watermark sensor. It may have the same type of output as your
> >radiosonde, but still waiting for them to email the detail. Does
the
> >equipment you have measure soil moisture?
>
> Radiosondes are usually on balloons, so they are not in a position
to
> measure soil moisture! (unless done via infrared remote sensing).
>
> The Watermark sensor has an AC resistance that changes in response
to
> moisture content of the surrounding soil.
> http://www.emesystems.com/smx.htm
> I have it for sale as a waterproof sealed module, and the circuit
is
> given there too if you want to try to roll your own.
>
> With regard the the SHTxx, I've used lots of them with very good
and
> consistent results. Like all absorption hygrometers, they do have
> problems at the high end of the range, if they are kept for long
> periods (days at a time) at 100%RH.
>
>
>
> -- Tracy
> <donald_desaulniers@h...> wrote:
> > Walter,
> >
> > While I have never used the SHTX sensor, I tried a sensor from an
> obsolete
> > RS80 Radiosonde which has a module for sensing barometric pressure,
> relative
> > humidity and temperature. The T and R.H. sensors respond quickly
> (i.e.
> > stabilize within seconds) and the P sensor track very well the
> changes in
> > barometric pressure. The only trick is that the sensor produces an
> audio
> > output signal with 6 tones corresponding to High and Low
> references,
> > T-board, T-ambient and Relative Humidity. I use the basic stamp to
> decode
> > the frequency of the output tones and then calculate the values
> with the
> > coefficients supplied with the radio sonde.
> >
> > I paid about $4US the sonde on Ebay. For me most of the fun was
> figuring out
> > how to decode the information.
> >
> > I can send you more information if you are interested
Please send me more information. I launch my own radiosondes
but would like info on the NWS ones.
Thanks.
Paul Verhage
I do not want to clutter this discussion group with non BS info.
Please send me you email so that I may send you the info I have on the RS80
Radiosonde.
>From: <verhap@o...>
>Reply-To: basicstamps@yahoogroups.com
>To: basicstamps@yahoogroups.com
>Subject: Re: [noparse][[/noparse]basicstamps] Re: SHTX humidity/temp sensor
>Date: Mon, 26 May 2003 13:56:36 -700
>
> > --- In basicstamps@yahoogroups.com, "Donald Desaulniers"
> > <donald_desaulniers@h...> wrote:
> > > Walter,
> > >
> > > While I have never used the SHTX sensor, I tried a sensor from an
> > obsolete
> > > RS80 Radiosonde which has a module for sensing barometric pressure,
> > relative
> > > humidity and temperature. The T and R.H. sensors respond quickly
> > (i.e.
> > > stabilize within seconds) and the P sensor track very well the
> > changes in
> > > barometric pressure. The only trick is that the sensor produces an
> > audio
> > > output signal with 6 tones corresponding to High and Low
> > references,
> > > T-board, T-ambient and Relative Humidity. I use the basic stamp to
> > decode
> > > the frequency of the output tones and then calculate the values
> > with the
> > > coefficients supplied with the radio sonde.
> > >
> > > I paid about $4US the sonde on Ebay. For me most of the fun was
> > figuring out
> > > how to decode the information.
> > >
> > > I can send you more information if you are interested
>
>Please send me more information. I launch my own radiosondes
>but would like info on the NWS ones.
>
>Thanks.
>
>Paul Verhage
>
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> basicstamps-unsubscribe@yahoogroups.com
>from the same email address that you subscribed. Text in the Subject and
>Body of the message will be ignored.
>
>
>Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
>
>
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