A cave diver who enjoys participating on scientific research expeditions, ranging from British Columbia to Mexico.
Uses a re-configurable chain of DS18B20 one wire sensors to create a poor-mans thermistor string for underwater deployments. Calibration is one challenge, as is the ever present threat of epoxy failure.
Using MS58xx series sensors, recorded underwater pressure and derived tide height by subtracting the barometric record from a second matched sensor on the surface. Also recorded water temperature with a DS18b20.
Operates as a freely swinging pendulum, where drag induced tilt is measured as a proxy for flow velocity. Used in cave environments where low ceilings and floating crud interfere with other flow measuring instruments.
Funnels water drops onto an accelerometer in "tap sensing" mode to generate interrupts which update a counter. This is a housing mod. for the cave water drip sensors I came up with for my wife's research.
Uses DS18b20 sensors to measure dry vs wet bulb temperature differences and derive relative humidity.