Moisture Sensor

[drax]

Anyone have any idea how to design a moisture sensing circuit or can lead me to an existing product.<br>Thanks,<br>

 

[bartos]

Suggestion:<br>Contact some of the following manufacturers and ask for an application engineer:<br>1.<br>NDC Infrared Engineering<br>626-960-3300<br>2.<br>Davis Instruments, LLC<br>800-548-9409<br>3.<br>Soilmoisture Equipment Corp.<br>888-964-0040<br>4.<br>Dryning Technology<br>409-385-6422<br>5.<br>AgriChem, Inc.<br>612-434-6755<br>6.<br>Scale-Tron, Inc.<br>800-632-7083<br>The application will determine the selection of sensor and the selected sensor its accessories including the circuitry.

 

[drax]

Thanks Bartos for the info.<br><br>Mark<br>

 

[Tedjo]

For the sensor head try browsing on Microsyst MS8005 RH sensor and also available w/ circuit from National Semiconductor Application sheet. Good luck!

 

[pwaterworth]

Try Betatherm Sensors Ltd. at <A HREF="

http://WWW.betatherm.com"

TARGET="_new">

http://WWW.betatherm.com</A>

 

[RedDerek]

What is the range of humidity or dew point are you looking for? This makes a difference in the sensor technology. [sig][/sig]

 

[twodogs]

I designed a circuit that runs off 24vdc, operates a solenoid, and senses soil moisture content. Wanta talk? Uses a Nat Semi chip... [sig][/sig]

 

[mjamil]

Firstly you need to know the application, and any special conditions, whether you require a submersible, contact type, a Infra-red or Microwave (non-contact) type, etc...etc..

It often helps, if you describe all the details firstly and then ask questions.

my interest in this was that I too am looking for a Non-contact Moisture sensor, But I have another cheaper idea, and would want to know views of some Electronic champs around here, as I am into automation, (but not an electronic Engineer), What I want is to meaure the moisture of Product, (Contact type) by measuring the Conductivity/Resistance, draw a table, and convert them in the PLC and give out the result, PLC is no problem for me, ButI am looking for someone who could guide/assist me how to construct this SUPER DOOPER capacity Sensor (You can take an example of the Multi meter set to Conductivity/Resistance, with super sensitivity.)
Would apprecite any help at iel@cyber.net.pk [sig][/sig]