Moisture Meter

[jsmith]

Anyone have a simple design approach for a moisture meter for house plants?

 

[Rich Grise]

On Tue, 11 Jan 2005 22:56:05 -0500, jsmith wrote:

Anyone have a simple design approach for a moisture meter for house plants?

Well, you could go to the plant store and buy one for about five bucks,
and reverse-engineer it.

Good Luck!
Rich

 

[Robert Baer]

jsmith wrote:

Anyone have a simple design approach for a moisture meter for house plants?

Yup! Seen them in stores with garden stuff (Home Depot comes to mind).
It is an ohm-meter; some look like a single probe that one pokes into
the ground - it has two sections insulated from each other.

 

[Rich Grise]

On Thu, 13 Jan 2005 08:49:40 +0000, Robert Baer wrote:

Spehro Pefhany wrote:

On Wed, 12 Jan 2005 07:28:11 GMT, the renowned Robert Baer
robertbaer@earthlink.net> wrote:

jsmith wrote:

Anyone have a simple design approach for a moisture meter for house plants?

Yup! Seen them in stores with garden stuff (Home Depot comes to mind).
It is an ohm-meter; some look like a single probe that one pokes into
the ground - it has two sections insulated from each other.

I think they are actually two dissimilar metals and they are connected
to a microammeter. The moisture is the electrolyte in a sort of
battery- and the metals are consumed over time.

Best regards,
Spehro Pefhany
--
"it's the network..." "The Journey is the reward"
speff@interlog.com Info for manufacturers: http://www.trexon.com
Embedded software/hardware/analog Info for designers: http://www.speff.com

That would be another way to impliment the function.
The one i saw was an ohmmeter.

How often did you have to change its battery?

Thanks,
Rich

 

[Robert Baer]

Spehro Pefhany wrote:

On Wed, 12 Jan 2005 07:28:11 GMT, the renowned Robert Baer
robertbaer@earthlink.net> wrote:

jsmith wrote:

Anyone have a simple design approach for a moisture meter for house plants?

Yup! Seen them in stores with garden stuff (Home Depot comes to mind).
It is an ohm-meter; some look like a single probe that one pokes into
the ground - it has two sections insulated from each other.

I think they are actually two dissimilar metals and they are connected
to a microammeter. The moisture is the electrolyte in a sort of
battery- and the metals are consumed over time.

Best regards,
Spehro Pefhany
--
"it's the network..." "The Journey is the reward"
speff@interlog.com Info for manufacturers: http://www.trexon.com
Embedded software/hardware/analog Info for designers: http://www.speff.com

That would be another way to impliment the function.
The one i saw was an ohmmeter.

 

[Robert Baer]

Rich Grise wrote:

On Thu, 13 Jan 2005 08:49:40 +0000, Robert Baer wrote:

Spehro Pefhany wrote:

On Wed, 12 Jan 2005 07:28:11 GMT, the renowned Robert Baer
robertbaer@earthlink.net> wrote:

jsmith wrote:

Anyone have a simple design approach for a moisture meter for house plants?

Yup! Seen them in stores with garden stuff (Home Depot comes to mind).
It is an ohm-meter; some look like a single probe that one pokes into
the ground - it has two sections insulated from each other.

I think they are actually two dissimilar metals and they are connected
to a microammeter. The moisture is the electrolyte in a sort of
battery- and the metals are consumed over time.

Best regards,
Spehro Pefhany
--
"it's the network..." "The Journey is the reward"
speff@interlog.com Info for manufacturers: http://www.trexon.com
Embedded software/hardware/analog Info for designers: http://www.speff.com

That would be another way to impliment the function.
The one i saw was an ohmmeter.

How often did you have to change its battery?

Thanks,
Rich

It used a solar cell as its power, did not see any battery inside.