water tank level?

[szormpas]

Hi, I was wondering whether I could use opengarage just as a water tank level sensor. For example, put it at the top of my home water tank in order to monitor the water level. What kind of waterproof enclosure should I use?

Could the above be an alternative use of opengarage? I’ve been looking for a water level sensor for awhile but all options seem to me very expensive for home use.

Many thanks

Sotirios

[Ray]

Yes, I think this is a great alternative use of OG — a while back I saw a project here:

Sump pump alert with Moteino & HC-SR04

that uses the same ultrasonic distance sensor for sump pump monitoring.

I think the stock OG firmware can already be used as a water level sensor — you can set the threshold to an appropriate value you want, and you can change the mount from ‘ceiling mount’ to ‘side mount’ if you need reverse logic.

[szormpas]

Thank you Ray,

where could I find the technical specification of OG board. What is the voltage output of relay?

Can I use the on-board relay to switch on/off for example a water pump?

Great product!
Sotirios

[Ray]

OpenGarage is completely open source, you can find the circuit design at:
https://github.com/opengarage

I am not sure what you mean by ‘the voltage output of the relay’ — the relay does not output any voltage itself, it’s a switch. The on-board relay is rated 3 amp contact current. If your water pump exceeds 3 amp, you should NOT use the on-board relay but you can use an external relay with larger current rating, or solid state relay.

[szormpas]

Hi,

I mean the max voltage (AC or DC) and max current that I can directly switch on/off with the on-board relay. I made a diagram below:

thanks

• This reply was modified 8 years ago by szormpas.

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[Ray]

The current rating of the relay is 3A @ 250VAC (also 3V @ 30VDC)

[szormpas]

thanks, this is a useful information.

[Author]

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