Probably the most accurate hygrometer in its price range. Caliber 4R Precision Hygrometer +/-1% RF Gold A really very precise hygrometer for accurate humidity measurement in humidors and wherever you are. The accuracy of a calibre is probably no other hygrometer, sometimes with the exception of several hundred euros expensive laboratory hygrometers. Our special recommendation. Accuracy of +/-1% RF Updates every 10 seconds. Secure magnetic attachment. Adjustable Fahrenheit / Celsius. Front diameter: 5.5 cm, rear diameter: 4.9 cm. While cheap digital hygrometer measures via a salt membrane, which unfortunately has a very limited service life in accuracy, the latest ZX circuit technology is used and reliably prevents wrong measurements. The advanced humidity sensor measures with an accuracy of +/- 1% at 70% relative humidity.
