Android Question Help with identifying the right tank level sensor module.

Beja

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Hi all,

I am working on a project to detect and transmit a 15 meter high tank liquid level value. the sensor is wireless (IR, ultrasonic or laser).
It must have serial interface (RS232 or RS485) so I can connect it to Arduino or other micro-controller to transmit the level data. .
The tank liquid could be water, oil or any other liquids.
Anyone working in this filed please help with suggesting a good industrial grade sensor.

Thank in advance
 
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Mark Read

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You could use the hydrostatic pressure of the fluid. Connect a pressure sensor to the tank below the level of the fluid. A typical sensor uses 24V supply and delivers 4-20mA as a data signal. 10m of water gives a pressure of 1 bar, so 1 mbar is 1 cm. The connection is typically ½" or ¼". The current signal you can then convert to 1-5V using a 250 ohm resistor. A link is here. When using a different fluid than water, you will need to add a density factor.
 
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Beja

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Thanks Mark,
unfortunately RS Components discontinued that sensor .. will see if there's a replacement.
 
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Mark Read

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Not sure what you were looking at but I meant this.
 
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