[Mike] lives in a temperate rainforest in Alaska (we figured from his website’s name) and uses a 570 gallon oil tank ... different sensors he had considered to measure the oil level and finally ...

[Renzo Mischianti]’s friend has to keep a water tank topped up ... with a solar-powered sensor that communicates over LoRa, and a controller that receives the water level readings and powers ...

The new BinMaster ToughSonic TC-100 and TC-200 non-contact ultrasonic sensors include general-purpose and chemical-resistant ...