He devised an instrument that made the sonar more accurate by allowing for temperature changes in the water.

ECONOMIST: Athelstan Spilhaus

But it requires a huge amount of energy to change the temperature quickly, and the temperature isn't always precisely uniform across all the samples in the instrument.

FORBES: Technology

That company, Kanto Aircraft Instrument Co. makes a system that monitors voltage, charging and temperature of the lithium-ion batteries.

NPR: US Regulator Asks Boeing For Full Battery History

It will also incorporate the observations of another current Metop instrument, Amsu (Advanced Microwave Sounding Units A1 and A2), which makes temperature profiles of the atmosphere.

BBC: When 'state of the art' is also years old