I've got an Arduino/Bluetooth (Bluetooth Bee-Standalone). I've hooked it up with an HC-SR04, it's intended to be mounted at the top of a rain barrel to measure the water depth. What's the best ...

TruWare easily converts data to an accurate water level reading that is fully compensated for barometric pressure, temperature and water density. Also included with each transducer is a 48-point ...

Measurement Specialties’ TruBlue 255 Level data logger remotely monitors water levels in the harshest water environments. The Lithium-ion battery-powered unit can collect up to a half-million ...