chimera Posted September 14, 2004 Report Share Posted September 14, 2004 Need a (submersible) optical switch (preferably not a float switch) to detect when the water level in the sump drops below a certain level it will automatically switch off the return pump. Anyone know any suppliers of these in NZL at a good price? Quote Link to comment Share on other sites More sharing options...
Warren Posted September 14, 2004 Report Share Posted September 14, 2004 Try me! Is the sump in the dark? Quote Link to comment Share on other sites More sharing options...
chimera Posted September 14, 2004 Author Report Share Posted September 14, 2004 sump is in a room which has generally has the light switched off, so pretty much dark yes. why is that? optical light switch? Quote Link to comment Share on other sites More sharing options...
Warren Posted September 15, 2004 Report Share Posted September 15, 2004 Many optical levle sensors are quite light sensitive. If it is in the dark you can get away with a cheap switch. If there is a lot of light at certain times you may need the non-light sensitive version. The non-light sensitive version cost about 4x as much... Quote Link to comment Share on other sites More sharing options...
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