How Does One Hang Their Balls?

[nobber9999]

Having just purchased a replacement liquid level control switch I find that there are no instructions inside the box other than terminal markings for suck or blow control. Unfortunately, my old control unit was a single float type and the new one has two almost spherical weights (which I presume are zero buoyancy) so I am unable to copy the installation. The switch is straight forward rather like the pull cord light switch in bathrooms but I need to know the configuration of the two balls. Do you attach the switch to one and then take another line to the second ball? Just as a matter of interest, the original super dupa single float switch comes only with a 2m length of cable which is great for a water tank that can cut the pump if the water gets too low but no dam_n good for a 25 foot well.

[elkangorito]

What do you want this float switch to do? Will it directly switch the pump motor or not? If this is the case, what size is the motor (in kW or Amps please)?

BTW, there are float switches available with 30 foot long cable.

Edited January 11, 2010 by elkangorito

[Rimmer]

Not quite sure what you might have there but the usual configuration for a float switch is both floats on the one string that controls the micro switch at the top.

[nobber9999]

What do you want this float switch to do? Will it directly switch the pump motor or not? If this is the case, what size is the motor (in kW or Amps please)?

BTW, there are float switches available with 30 foot long cable.

[nobber9999]

Hi Elkangorito,

The mains supply comes to the pump via the switch which is intended to cut off the supply before the water is lower than the top of the pump. As you gathered from this, the pump is a submersible and is 750 watt if memory serves me correctly. The switch will sit across the top of the well (2'6" appx. concrete rings) and dangle the weights down into the water. The cable from the pump will enter the switch along with the mains supply.

Thanks for the info about floating sensors with long cables but here in Nakhon Ratchasima they still use a bucket with holes in to take a shower!! OK not quite that bad but not far off. The cable to the pump was not a problem but the cable to the floating sensor was, insofar as I required it to drop a lot further than 2m before turning the pump off. With the new sensor it remains clear of the water so I just attach the cable myself.

[elkangorito]

I am of the opinion that using a float switch with a long lead is the best solution. The problem is sourcing it.

On the other hand, can you supply any details about the float system you have recently purchased? Ideally a part number, a web address &/or a circuit diagram etc.