RE: Subject: Moisture sensing in wood chips

[Jim Herbison]

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Dear Chris

The Aquaflex Soil Moisture Sensor has been successfully applied to many
Biofilters in New Zealand, Australia and Europe.

The unique sensing element of the Aquaflex sensor (a 3m long tape that is
laid in the material to be measured) is easily installed in the Biofilter
medium and the spatial averaging over the tapes 3m length ensures you get a
representative reading of the medium (both moisture and temperature readings
are available).

Various configurations are available depending on your requirements (4 to
20mA output, frequency output, self contained logging sensors etc).

Feel free to contact me if you require any further information.


Best regards

Jim Herbison
Streat Instruments Ltd
j.herbison@streatsahead.com
www.streatsahead.com

> -----Original Message-----
> From: owner-sowacs@aqua.ccwr.ac.za [mailto:owner-sowacs@aqua.ccwr.ac.za]
> Sent: Tuesday, May 15, 2001 08:43
> Subject: Subject: Moisture sensing in wood chips
>
> Dear Sir/Madame:
>
> I am trying to find a device that can be inserted into
> a woodchip/compost mixture to determine the moisture
> content. The target range desired is around 40-60%
> saturation but measurements might range from 10% to
> 100%.
>
> There may be significant airflow through the wood
> chips while measurements are being made as they are
> being used as a biofilter medium. Ideally, we are
> looking for hand held devices and devices that can be
> left in-situ and hooked up to a data-logger and/or
> automated irrigation systems.
>
> The high porosity seems to be a problem.  Does anyone
> know of a moisture probe suitable for this
> application? Please advise on availability and prices.
>
>
> Thank-you in advance,
>
> Chris Magura
> University of Manitoba
> Biosystems Engineering
>
> [Bruce comments:
> Measuring in hay might be similar: I have placed the links below on the
> webpage:
> www.sowacs.com/findasensor/hay.html
>
> Delmhorst has a hay moisture monitoring sensor an logger
> http://www.delmhorst.com/moisture.html
>
> Have a look at this thread in the 1999 sowacs archives:
> www.sowacs.com/archives/99-12/threads.html#0001
>
> which mentions Draminski Moisture Meter for hay and straw
> http://www.draminski.com/moisture.html
>
> This list and any others has been added to a new page in the "findasensor"
> section  of sowacs. So please send all other URLs you may find on this,
> thanks
> Bruce]
>
>