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NOTE: To get off this list, send email to majordomo@aqua.ccwr.ac.za with the body of the message containing the line: unsubscribe sowacs Prof. Robock, Spectrum Technologies has developed mini data loggers and datalogger-equipped weather stations that can record a variety of environmental parameters, including soil temperature and soil moisture. Soil temperature data is measured with a thermistor. Soil moisture can be read with either granular matrix sensors or tensiometers equipped with pressure transducers. These sensors measure soil matric potential. The dataloggers are configured through software to set the logging interval and select the sensors being measured. The logging duration depends on logging interval. A logger recording at half hour intervals would fill up in about 2.5 months. The mini dataloggers can read up to 3 external sensors. The weather stations read rainfall, wind speed/direction, air temperature, relative humidity as well as 4 external sensors. Both the mini dataloggers and weather stations can be downloaded manually. In 2002, the weather stations will also have the ability to be downloaded remotely via wireless or phone-modem communication. Further product information and specifications are available at our website www.specmeters.com. Please contact us if you have any further questions. Sincerely, Doug Kieffer Spectrum Technologies >From: owner-sowacs@aqua.ccwr.ac.za >Subject: Equipment for national monitoring >Date: Tue, 18 Dec 2001 06:56:09 GMT > >Sowacsers > >NOAA is planning a national climate monitoring network with 250 station >throughout the US. We will be able to install soil moisture and >temperature sensors that will operate automatically and should work for >many years. Please send me advice on what type of sensor to use. > >Obviously, gravimetric obs would be best, but this is too expensive. My >experience with thermal dissipation sensor data now being used at the >Oklahoma Mesonet is that it is difficult to get them to work well in all >soils. What would be the best to use for a long-term climate monitoring >network, measuring the top 1-2 m of soil at 4-8 levels? > >Alan Robock > >Professor Alan Robock > Editor, JGR - Atmospheres > Director, Center for Environmental Prediction >Department of Environmental Sciences Phone: +1-732-932-9478 >Rutgers University Fax: +1-732-932-8644 >14 College Farm Road E-mail: robock@envsci.rutgers.edu >New Brunswick, NJ 08901-8551 USA http://envsci.rutgers.edu/~robock > >