Can anyone recommend a good, accurate hygrometer

[olotti]

I'm setting up my new, larger coolerdor and I want to have a hygrometer set up high and a hygrometer set up low and on opposite sides just to make sure there is a balance throughout the cooler. I will still be using my trusty old Radio Shack hygrometer but I need another one. Any ideas. Doesn't have to be anything too fancy just accurate. This old radio shack hygrometer has been going strong for almost 10yrs and still is only 2% low for humidity, I've tested it with salt and with boveda humidity pouches and it is extremely consistent, too bad they don't make em anymore.