"Seeing is believing," the founder of lab company Truvian told me. So I tried its tabletop blood testing device—which promises results in 30 minutes—for myself.

Imagine a food testing laboratory scenario where the pH of brine is being measured. If the pH meter used is calibrated at ...

pH meters are electric appliances used for measuring the- alkalinity or acidity of a solution. pH is measured using potentiometric methods or pH indicators such as indicator solutions or strips ...

anesthesia and respiratory equipment, cystoscopes, esophageal manometry probes, laryngoscope blades, and diaphragm fitting rings, and noncritical items such as blood pressure cuffs and bedpans.