A simple temperature sensor using a two-wire transmitter for PRTDs combined with the still-popular 4 to 20 mA analog current ...

Loop powered particulate transmitter and filter leak/emissions detector for baghouses, cartridge dust collectors and cyclones provides simple 2-wire installation and single piece mounting.

Rooms mics and a low power FM transmitter didn’t work because those using radio as aids to hearing the service felt awkward, so [David] decided to take advantage of a feature in the hearing aids ...

Loop powered particulate transmitter and filter leak/emissions detector for baghouses, cartridge dust collectors and cyclones provides simple 2-wire installation and single piece mounting.