Hygrometer Mounting Adapter

Adapter for mounting a small round hygrometer ([banggood*](https://www.banggood.com/LCD-Mini-Celsius-Digital-Thermometer-Hygrometer-Meter-p-937056.html?p=EY011634303112016018), [amazon*](http://amzn.to/2ucYZwc)) inside the lid of Iris watertight storage bins, using small binder clips. I use a mix of [46 quart*](http://amzn.to/2tI4hN8), [30 quart*](http://amzn.to/2u3g7nD), and [20 gallon](https://www.containerstore.com/s/clear-weathertight-trunk/d?productId=10024301&q=iris%20trunk) bins.

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