Re: [IR-L] soil moisture sensors

[Jan Windscheffel <jwindscheffel@esica.com>]

Daryl,

For moisture sensors that are compatible with SCADA technology, I would
like to introduce you to the new, Gro-Point Soil Moisture Sensor, manufactured
by Environmental Sensors, Inc. in Victoria, BC, Canada.

This sensor is based on TDT technology which is very similar to our Moisture-Po

int TDR system that has been on the market for about four years.  One
major difference is that Gro-Point is much less expensive.  Complete sensors
retail at US$241.00 and we have a full line of low cost accessories. 
A display unit is $261.00, a waterproof three channel data logger is $299
and a data shuttle is $159.00.

Output, direct from the sensor is 0.5 - 5mA (can easily be converted to
0.25 - 2.5 volt by addition of a 500 ohm resister).  Output is equivalent
to 0-50% soil moisture by volume.  Sensor output is linear between 5%
and 50%.  This output is compatible with SCADA standards.  We will be
happy to provide technical assistance on the connection.

Gro-Point is very accurate at +/- 1% soil moisture by volume.  The accuracy
is maintained in soil types from fine sands through clays (clays with
<50% clay particles).  For course sand and clays (with >50 clay) we recommend
our Gro-Point extended range sensor, which has larger sensing elements.
 Accuracy is maintained in salinity to 6 dS/m.

I will be happy to provide more information, please E-mail me at  jwindscheffel

@esica.com.

You should also check our corporate web site at:  www.esica.com.  Also
a new web site for Irrigation Moisture Sensors, Irrigation Controllers
and Moisture Management at:  www.envsens.com  (this web site will not
be operating until the end of this week, check it on March 15).

Jan Windscheffel
Environmental Sensors Inc.
2759 Pasatiempo Glen
Escondido, CA 92025
760-739-0041
fax: 760-739-9656
E-mail:  jwindscheffel@esica.com

========================================

From: Daryl Wilkie <daryl@SRWA.ORG.AU>
To: Internet Mail::[windscheffel@home.com]; Internet Mail::[IRRIGATION-L@LISTSE

RV.GMD.DE]

Subject: [IR-L] soil  moisture sensors
Date: 3/3/99 1:41 PM

Can anyone provide me with names of suppliers of soil moisture sensors
interfaced with S.C.A.D.A system.

regards

Daryl Wilkie
daryl@srwa.org.au