humidity gauge

what brand is the best and where is the best place to buy a humidity gauge for my bps tanks... ummm id like a good price on one.. like not over $30.00 but any info would help! thanks!

Home Depot or Walmart, its an Accurite Thermomter/Hygrometer combo and its NEVER more than $20, plus there is a DIY on here to separate the temperature sensors and humidity sensor and extend them to make it more accurite and exactly where you want it.