Pressure loss sensor or relay?

Bytesize · Jun 18, 2008

Just wondering if anyone has any ideas on a air pressure sensor that will send a 4 to 20ma signal to a PLC...that’s cheap.

I’m looking for something to disable our pumps when our pneumatic valves do not have sufficient pressure to operate.

Thanks...

tragically1969 · Jun 18, 2008

Doubt you will find a "cheap" one with 4 to 20ma, you will be able to get one with a preset limit which will switch a digital, loads out there, depends who your preferred supplier is but i have used IFM before

http://www.ifm-electronic.com/ifmuk/web/ps!select2_40_10_20.html

Ken Moore · Jun 18, 2008

For inexpensive, non-critical devices, I usually use omega

http://www.omega.com/ppt/pptsc.asp?ref=PX209_PX219&Nav=preb04

72hdflh · Jun 18, 2008

Look at these

http://web3.automationdirect.com/adc/Shopping/Catalog/Sensors_-z-_Encoders/Pressure_Sensors/Pressure_Transmitters

Bytesize · Jun 18, 2008

Hey thanks for the info.

TConnolly · Jun 18, 2008

http://www.gemssensors.com/

Ken Moore · Jun 18, 2008

I googled these:
http://www.transducersdirect.com/He...zpyFRRSCQoALEEU/9J6Yd2usBrxc&productsku=TDM30

Says as low as $45.00

leitmotif · Jun 18, 2008

My first thought was why not just use a pressure switch. However using a transmitter with 4 - 20 would allow monitor of line pressure and then you could control each valve for its needed air pressure ie
to operate
Valve A needs X pressure
Valve B needs Y pressure

I kinda liked that
Dan Bentler

CharlesM · Jun 18, 2008

Automation Direct

http://web3.automationdirect.com/adc/Overview/Catalog/Sensors_-z-_Encoders/Pressure_Sensors?banner_0618

Pressure loss sensor or relay?

Bytesize

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tragically1969

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Ken Moore

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72hdflh

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Bytesize

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TConnolly

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Ken Moore

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leitmotif

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CharlesM

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