We tested popular wideband O₂ controllers against lab-grade equipment to see how accurate their lambda readings really are ...

If you build engines, tune cars, or even just like mashing your foot on the throttle with conviction, you’ve probably heard the term “wideband O2 sensor” being thrown around at the track, dyno ...

For electrical engineers working in almost any part of the wired or wireless spectrum, the spectrum analyzer is a critical test and measurement tool. For optical engineering, the equivalent tool is ...

For heart rate testing, Horst used a Polar H10 chest strap as the benchmark. The Apple Watch Ultra 2, running watchOS 26 beta, delivered results that were nearly identical to the strap during indoor ...

If you’ve had your eye on a new Apple Watch Series 10, now’s the day to finally get one. Not only is it $100 off, starting at just $299 for the 42mm model, but the blood-oxygen sensor is finally ...

In a surprise Thursday announcement, Apple says that it is bringing the blood oxygen sensor feature back to the Apple Watch Series 9 and newer. The returning feature will be part of an iOS 18.6.1 and ...

Apple removed blood oxygen monitoring from the Apple Watch in early 2024. Somebody has to blink for it to return, and it looks like neither Masimo nor Apple are going to budge. Blood oxygen monitoring ...

Army Secretary Dan Driscoll is shown the newly arrived Lower Tier Air and Missile Defense Sensor, or LTAMDS, seen in the background during a rainstorm on Guam on July 27, 2025. (SFC Nicole Mejia/U.S.

Stardour, a space-tech startup, has completed the test fire of a hydrogen and oxygen propulsion engine, developed in-house by Stardour and tested at the Indian Institute of Science (IISc), Bangalore.

The U.S. Space Force expects to launch the eighth X-37B mission no earlier than Aug. 21. Credit: U.S. Space Force The U.S. Space Force plans to use its X-37B orbital test vehicle to conduct ...

The facility, whose exact location has not been disclosed yet, will be used to support commercial, military and government programs, including ISR and electronic warfare platforms such as the G550 ...