GHL Level Sensor

[NDJ]

Hi Steve,

Could you advise what parts I will require to run a level sensor of a Plus II, i.e. sensors cables and expansion card. Need it to control a pump for auto top up.

:thanks:

[evilscoop]

min 1 level sensor...either float or optical...
And a way of attaching it in the tank :D

you could run a splitter and have 2 sensors if you wanted but dont really need to tbh

II+ already has a sensor port (next to temp sensor port)

[instantsquid]

As above, the controller already has the port for the level sensor - so you just need a sensor (float switch or optical). These don't come with any means of fixing them in your sump, so you'll need the brackets to hold it in place too - see here: http://www.ghl-profilux.co.uk/acatalog/Level_Sensors.html

If you've already got a plugbar, then you simply assign one of the sockets to being "auto top-up", plug in your pump and away you go!

[NDJ]

Cheers guys for the info.

Another daft question, which section of the sump should the float switch be mounted in?

[instantsquid]

To answer a daft question with a daft answer - whichever section drops when water evaporates! :p

Typically this will be the last section of the sump where your return pump is located. Most sumps are designed to use baffles which ensure the water height remains constant in the sections containing skimmer, sand beds, algae, or whatever. Only the final section should show a drop in water level as water evaporates.

[NDJ]

To answer a daft question with a daft answer - whichever section drops when water evaporates! :p

Typically this will be the last section of the sump where your return pump is located. Most sumps are designed to use baffles which ensure the water height remains constant in the sections containing skimmer, sand beds, algae, or whatever. Only the final section should show a drop in water level as water evaporates.

That definitely makes sense :D. One last question which is better to use optical or float?

[instantsquid]

Personally, I find the float switches work fine. There's no chance of a snail, or other critter getting into the return section of my sump, so I can't justify the extra expense of the optical sensor.
If money is no object, then get the optical sensor - or if you have critters in the sump which could potentially get into the return section and sit on a float switch, then get the optical sensor. Otherwise, the float switch will work just fine.