Read up on 4-20mA current loop. Industry standard or prefered method. Didn’t know that.
When I posted, the thought was in the back of my mind, ‘probably will not matter due to it be a current loop’.
Thanks for confirming Bob.
Cheers
Jim
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Hi Jim
Not sure but I think 4 - 20mA loop is a pretty robust system in “dirty” environments.
Cheers Bob
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Hi Matt,
I know you mentioned you arent keen on Solar/batteries - buuuut @David191372 has a really great LoRa based solution here: LoRa P2P Wireless Gate Alarm - Tutorial Australia
Just something to keep in mind!
Liam
I took the plunge and bought the 4-20ma pressure sensor, ran 150m of 2.5mm dc wiring and connected it to my Victron Tank 140 (ch4 12-24v) which connects to my Victron Cerba GX, I set the parameters and she works perfectly
Hi Matt
Very good to hear and thanks for letting us know the result.
Just to round off. If that 2.5mm wire is 2.5 square mm it should do very nicely. Better to be a bit bigger than required than too small.
The 4 - 20mA system has been around for a long time and has been proven in adverse environments. One of the pluses is that is just about immune to wire and other external resistance changes unless they are outside the scope of the supply voltage. The system senses CURRENT and will use as much of the supply as it needs to achieve that current. Of course as with everything there are maximums to all of this but in practise the system will handle a very wide range of external resistance, which is almost always different lengths of different size wire, quite happily. That is one good reason the 4 - 20mA loop system is still in use.
I am a great believer in the KISS principle and the “Horses for Courses” saying.
Anyway, enough said. Good result.
Cheers Bob
