Cheapest I've seen and been monitoring pricing on this one: TP-Link Tapo T300 Water Leak Sensor. Detect leakage and drips.
Scorptec and Centrecom both have it $31
Insufficient quantity at Centre Com, removed from title. (Mod)
Scorptec surcharge: 1% for card & PayPal payments.
Centre Com surcharge: 1.2% card & PayPal, 2% AmEx payments.
I'm very happy with my TP-Link home automation products and the water leak sensor solution was missing in my household. Ordered 5 to monitor kitchen, laundry, bathrooms. This one monitors drips and flooding. Some monitors only monitor flooding.
Centre Com $31
https://www.centrecom.com.au/tp-link-tapo-t300-smart-water-l…
Scorptec $31
https://www.scorptec.com.au/product/smart-home/smart-home-au…
This is cheaper than reduced price on amazon $35
https://www.amazon.com.au/TP-Link-Tapo-Real-Time-Waterproof-…?
This device compliments my contact sensors, motion sensor solutions that I use from TP-Link and connected to homeassistant.
TP Link App is pretty good on its own.
Hub which is required for this is on sale here and great value:
https://www.centrecom.com.au/tp-link-tapo-h100-smart-hub-wit…?
Or here a bit cheaper if you want to support amazon https://www.amazon.com.au/TP-Link-Tapo-Security-Ringtones-H1…
Hmm i thought i saw the same deal just yesterday