HX710B Air Pressure and Water Level Sensor Module

Water level can be measured indirectly through hydrostatic pressure - the deeper a sensor sits below a water surface, the more pressure it reads - and the same underlying chip that amplifies weak pressure-sensor signals for barometric measurement also works for exactly that water-level application. The HX710B provides a 24-bit ADC front end specifically tuned for low-level pressure sensor output, with an onboard low-noise programmable gain amplifier (32x, 64x, or 128x) selectable in software depending on the sensor and range in use.

Two selectable differential input channels give flexibility in sensor wiring configuration, and a simple serial digital interface keeps the microcontroller side of the circuit straightforward despite the precision analog front-end doing real work internally. A wide -40°C to 85°C operating range means the sensing electronics themselves tolerate demanding environmental conditions even if the actual pressure sensor connected to it needs separate weatherproofing.

Common uses are tank or reservoir water level monitoring via hydrostatic pressure measurement, general barometric pressure sensing for weather stations, and industrial pressure measurement applications needing precision beyond a basic analog pressure sensor's raw output.