HI,
Does anyone who has this detector know if and how to get a code for low battery?
Thanks.
I’m interested in this as I have 5 of these and the oldest ones are still on the original batteries after over 18 months of use. I noticed that there is an internal selector and by inserting/removing this it seems to change the RF code that is transmitted when you short the probes out on the bottom.
I fiddled about by adding some resistance in series with the battery to try and simulate a battery failure but without any luck. I then read somewhere that these don’t have a low battery RF code but that the LED flashes on low battery and presume that this is what they are refering to if you see “low battery indication” in the spec’s. As a result I have no idea what the internal selector is for.
I am still happy with the sensors as they are cheap and seem to work well, once I figure out how long a battery lasts then I intend to set a reminder to change them all in good time.
Yes, that is what I read too. Apparently the light flashes when it senses a low battery. I was just hoping it sends a code.
Interesting about the jumper. In the manual it states when the jumper cap is off, it is compatible with the common alarm host and doesn’t have low voltage indication, and when the jumper cap is in the “closure” state it is not compatible with the common alarm host and has the low voltage indication. This is what I am curious with, and what it actually means.
For me the flashing LED on low battery is the only downside with these units since as they are usually installled in inaccessible places then you aren’t really going to see this. That is why I am aiming to work out the typical battery life so that I can change these before out well before they die.
If you have Zigbee then the Aqara leak dector is a great little sensor that does include battery monitoring, I have a couple of these but they are 2-3 times the cost.
Mine are all very accessible, but still would like to get notified if a battery is low. But I can just replace them every 18 months. Very cheap insurance.
Oh this is so sad. I can’t find a 433MHz water leak sensor that isn’t idiotically designed in one way or the other that endangers its safety purpose: no battery reporting, no regular check-in signals, so you never know if it’ll actually detect anything. I got one of these SQ100B ones, but can’t put it into use if it doesn’t report a battery status. 
Maybe it would be possible to hack a battery message circuit using one transistor. Connect the base of the transistor to the LED Positive pin, and then connect the collector to one of the sensor plates, and the emitter to the other plate. When the LED comes on it shorts out the two plates just like there is water present. Wa-la, you get an alarm condition. When you go to check for water, and there is none, and the low-battery LED is blinking then you replace the battery. I would bench test this first to see if a series resistor would help instead of producing a direct short between the sensor plates.