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

PCWorld explains how to create an affordable CO2 air quality monitor using a Raspberry Pi and MH-Z19C sensor for under $40. This DIY project helps monitor indoor air quality since high CO2 levels ...

The RDO Trio's smart wiping system turns on automatically when dissolved oxygen readings drop below a user-set level. It clears away buildup that can cause incorrect low dissolved oxygen readings.

A vehicle’s Check Engine light can turn any car ride into a harrowing experience. As soon as the check engine light illuminates, it’s hard not to hear the cha-ching sound of a ...

In November, Withings released its long-awaited U-Scan: a home monitoring system for your urine. The gadget resembles an ...

NASA's X-59 supersonic demonstrator sits partially disassembled at Armstrong Flight Research Center following its October ...

Knowing a few precise mechanic terms can turn a confusing estimate into a clear conversation and keep you from paying for work you do not need. By understanding what these 14 concepts actually mean, ...

From sporty smartwatches to premium monitors, the best GPS sports watch will track your fitness and activity 24/7 ...

There are a lot of aviation apps out there that allow you to access useful aviation and weather data from your wrist. Here we ...

The Oura Ring does not directly measure blood pressure. This feature is not currently available on the device. Oura focuses on sleep quality, heart rate variability (HRV), resting heart rate, and body ...

Your watch’s VO2 max isn’t perfect, but you can improve its accuracy with better data and heart-rate tracking.

Home automation with high usefulness and low annoyance tends to rely on reliable person sensing, and [francescopace]’s ...