Hi everyone -- I'm trying to set up a simple water tank level sensor system (float sensor for high and low level which will send a wireless signal to a relay to turn a borehole pump on or off (about 400f away).
I was looking at Zigby receiver-transmitter pair, but it all starts to get really expensive really quickly, and requires quite a lot of complexity ito connectig up the sensors and relay.
Has anyone got a cheap and simple approach -- I'd have thought this is a very common application. Something plug'n'play...
Zigby equipment is pretty pricey and overkill for what you are looking to accomplish. Take a look on eBay for RF controlled relays. Most operate license-free at 433 MHz and allow for privacy codes to limit interference. You can pick up a Tx and Rx pair for under $10. And a simple relay setup would allow you to make a "toggle" circuit with 2 float switches.
Hi. I have just joined this site and was surprised to see this post as it is exactly what I am busy with. I was sick and tired of replacing electronic level control units because of lightning so I came up with a circuit using relays only, and for the level water measurement I have used a magnet running up and down a plastic pipe with reed switches for the high and low levels. I know an electronic/mechanical system can be problematic but it is very easy to isolate any problem. I do have a 3 core cable running back to the control unit but a transmitter system would be a lot better. I'll give it a try.