Monoprice Smart Leak Sensor : $19.99 AC + FS By admin | June 18, 2019 3:57 pm EST 0 Comment Monoprice via Rakuten.com has a Smart Leak Sensor for $19.99. Use code HOME20. Must be logged in to your Rakuten account to apply the promo code. https://www.rakuten.com/shop/mono…ct/133124/