hygrometer

Buy the "smart" scale/hygrometer/ruler: it has a sleek design with no screen, and it connects to your phone.

Because there's no point to wearing a hygrometer as a TSA officer.

Entrances are the last place I would want to put a air sensor, thermometer and/or hygrometer.

Invest ten bucks in a hygrometer and open the windows when the humidity gets too high.

TSA officers also aren't permitted to hygrometers on the job. Why?

When I finally got a hygrometer I was amazed at how useless the powered one gallon air humidifiers are.

I'll happily trade a hygrometer and thermometer for being waterproof.

I keep an accurate and calibrated hygrometer in the musical instrument room, and it's the rare day when it goes over 50% in Redmond.

The Galaxy S4 had a hygrometer and a thermometer, which are absolutely awesome and represent a really amazing trend of smartphones and environmental sensing.

Our second sensor network is WeatherSignal [2], which uses the barometers, thermometers and hygrometers on smart phones to crowdsource weather data and we have already published a scientific paper [3] showing the potential of this approach.

TSA officers may not be offered hygrometers, but I doubt if there is anything explicitly preventing them from carrying their own hygrometer - actively preventing officers from carrying dosimeters seems more likely to be tied to prevent any long term lawsuits.

Our second sensor network is WeatherSignal [2], which uses the barometers, thermometers and hygrometers on smart phones to crowdsource weather data and we have already published a scientific paper [3] showing the potential of this approach.\nIf the concept of crowdsourced sensor networks appeals to you too then please get in touch.