ASTM’s D-2974 standard for #moisture #sensing of #soil, plus other soil analysis. They specify oven-drying and burning, which I guess makes sense if you want the most precise values.
on 02017-01-03This industrial #moisture #sensing #hardware using microwaves to measure stuff on an production line supposedly has ±2% accuracy over a 1% to 85% range; it’s intended for wood products and chips.
on 02017-01-03The same dude who wrote the microwave #moisture #sensing #hardware article about paper wrote this other one about mozzarella; says accuracy is about 0.5%.
on 02017-01-03a 2012 article about #sensing #hardware using microwaves to measure paper #moisture, explaining how they measure the resonant frequency of a resonator built around a capacitance (I guess?) that depends on the moisture content of the paper.
on 02017-01-03Another microwave #moisture #sensing #hardware patent, this one from 1986, again for measuring moisture in paper.
on 02017-01-03Another patent on microwave #moisture #sensing #hardware, this one from 1984, this one using microwave reflectivity of a sheet of possibly moist paper.
on 02017-01-03a 1987 patent for microwave #moisture #sensing #hardware using attenuation of microwaves by moisture.
on 02017-01-03overview of #soil #moisture #sensing #hardware, including oven-drying; neutron thermalization sensing; gamma-ray attenuation sensing; and electromagnetic sensing (of resistivity or polarization), including measuring via a porous block; tensiometers; microwave thermal emission sensors; NMR sensors; simple thermal sensing; time-domain reflectometry; hygrometric techniques using air in equilibrium with the soil; electrolysis current measurement; and optical methods. By Nicole Huggins-Rawlins.
on 02017-01-03