Today, as the IR sensing technology evolves, the sensors also come in various system designs. Active Infrared (IR) sensors can be an emitter and detector as a single unit operating at the same. wavelength, or photoelectric sensor working with reflective surfaces. IR sensors can be categorized. as retro-reflective sensors and diffuse reflection sensors. Retro-reflective sensors are more proper.
1 A note about your meat: make sure you get rump roast, round roast, or sirloin-one of the cheaper cuts. 2  Using the slow roasting method for prime cuts of beef doesn't work as well, since prime cuts are more tender. 3  If you want to cook a prime cut of beef, see How to Cook a Prime Rib Roast. If you want to cook a prime cut of beef, see How to Cook a Prime Rib Roast. 2  Make sure the beef you get is boneless, and check for a dark pink, springy surface and plenty of marbling. 3  Depending on the cut you get, it might have a cap of fat on top.
1 Braise beef: 2  Preheat oven to 350Â°F with rack in middle. 3  Pat beef dry and season with 2 1/2 teaspoons salt and 1 teaspoon pepper. 4  Heat oil in pot over medium-high heat until it shimmers, then brown meat, without crowding, in 3 batches, turning, about 8 minutes per batch. 5  Transfer to a platter.