I'm looking to add at least one hygrometer to my bug room. I've seen a few reasonably priced and decently reviewed analog hygrometers online, but are they accurate enough for roaches? I'm looking at analog as it would be great to have one in each humid roach enclosure, but my gut says digital is the way to go - but I could only afford a few at the moment. Thoughts? Anyone have a brand/model to recommend of either version?