For the radio nodes, look at JeeNodes. That guy has sensors in his house that run for years on a single battery.
How wide is this well? I'm guessing that an ultrasonic sensor in a narrow pipe will work differently to one in a water tank.
For the radio nodes, look at JeeNodes. That guy has sensors in his house that run for years on a single battery.
How wide is this well? I'm guessing that an ultrasonic sensor in a narrow pipe will work differently to one in a water tank.