A pH meter is an electronic piece of equipment to determine the pH of a solution. An electrode (usually glass) is attached to the meter, which measures the voltage. As pH meters and probes require calibration before use, they can be calibrated with a standard buffer solution that is input into the machine (or it can be done without a solution) giving an accurate result. The buffer solution commonly uses the following three pH levels: pH 7, pH 4, and pH 9.2/10.
http://www.yinmik.com/ph-meter/

A monitor stand is a unique tool, purpose-built to ease your eyes and body while you are working at your computer. It is designed for your monitor to either sit on top or be fixated to, allowing you to adjust it based on eye-to-monitor preference. It is claimed that approximately 14% of optometry patients have vision problems due to prolonged work at their computers, making these monitor additions all the more prevalent.
http://www.ruiguanstand.com/monitor-stand/

A growing body of research suggests that disposable wipes are a safer and more effective infection control method than reusable cleaning cloths.
From misting to spraying to fogging, customers have a wide range of cleaning tools at their disposal for delivering cleaners and disinfectants – but choosing the right delivery mechanism can be difficult. http://www.maincleanwipes.com/wipes/

When I was younger, I considered socks to be an F-tier gift at best, but as I’ve gotten older I’ve learned to appreciate the mundane pleasures of a good pair of men’s socks. I started paying more attention to socks once I started hiking, which made me realize the importance of certain materials.
http://www.ltsocks.com/men-s-socks/

Modular cleanrooms have a very efficient design that can make them very cheap to run. Cleanrooms constructed in this way can often require less outdoor air for their temperature and humidity control, therefore reducing the energy cost of keeping the clean room environment stable.
http://www.lhcleanroom.com/clean-room/