Abstract: Embodiments relate generally to systems and methods for determining one or more characteristics of the ambient air of an environment. A system may comprise a sensor device comprising a sensor housing having a circular exterior front surface; a dot matrix display incorporated into the front surface; a touch sensitive surface incorporated into the front surface; a first sensor positioned behind the front surface, configured to make measurements used for a calculation of a characteristic of ambient air; an angled bottom surface configured to rest on a horizontal surface; and a processing system programmed to detect at least one characteristic of the ambient air, and to display the detected characteristic using the dot matrix display.

Abstract: A fatigue test apparatus for thin workpiece includes a supporting module, a driving mechanism, a first connecting module, a second connecting module, a first holding post, a second holding post and a computer system. The first and second connecting modules are respectively fixed to two sides of the supporting module. Ends of the first holding post and the second holding post are fixed to the first and second connecting modules. The computer system electronically connects with and controls the driving mechanism. The first holding post and the second holding post are drive to rotate by the driving mechanism.

Abstract: A fatigue test apparatus for thin workpiece includes a supporting module, a driving mechanism, a first connecting module, a second connecting module, a first holding post, a second holding post and a computer system. The first and second connecting modules are respectively fixed to two sides of the supporting module. Ends of the first holding post and the second holding post are fixed to the first and second connecting modules. The computer system electronically connects with and controls the driving mechanism. The first holding post and the second holding post are drive to rotate by the driving mechanism.