RE: Measuring moisture content in granular pavements

[Kees van den Bos]

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Dear Greg,


another useful source for this kind of sensors or meteorological sensors in
general: please take a look at th einforamtive site
 http://www.meteo-technology.com

Best regards,

Kees van den Bos (one of its editors)


-----Oorspronkelijk bericht-----
Van:	owner-sowacs@aqua.ccwr.ac.za [SMTP:owner-sowacs@aqua.ccwr.ac.za]
Verzonden:	07 February 2001 19:11
Onderwerp:	RE: Measuring moisture content in granular pavements

Greg

I believe that Delta-T Devices (Cambridge) and ELE (Hemel Hempstead) can
both supply Watermark granular matrix sensors.

>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
Dr Tim Hess
Institute of Water and Environment
Cranfield University
Silsoe, Bedford
MK45 4DT, UK
http://www.silsoe.cranfield.ac.uk/iwe/
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>

-----Original Message-----
From: owner-sowacs@aqua.ccwr.ac.za [mailto:owner-sowacs@aqua.ccwr.ac.za]
Sent: 07 February 2001 09:44
Subject: Re: Measuring moisture content in granular pavements

TDR does not work in highly granular materials and a gypsum block is only
appropriate if there is a high clay content or the materials are expected to
get very dry (>100kPa)

It sounds like you have a quarry rubble - if this is so then  most useful
device would be a granular matrix sensor such as the 'Watermark'.

Sorry, I don't know a UK supplier.

cliff.hignett@soilwater.com.au