A perforated cap on the probe allows the air to circulate while it protects the sensor. The standard cable is 2m long (6.6'), and a 5m (16.5') version is also available.

HI 8564 is specially designed for controlled environment applications such as museums, libraries, computer rooms and printing facilities.

The smooth membrane keyboard has 4 keys that make operation simple and quick. A large LCD displays readings in easy-to-read digits each with a symbol next to it to identify the operating mode.

Range	RH	10.0 to 95.0 %
Range	Temperature	0.0 to 60.0°C
Resolution	RH	0.1%
Resolution	Temperature	0.1°C
Accuracy	RH	±2%
Accuracy	Temperature	±0.4°C (for 1 year, excluding probe error)
RH Calibration		manual, 2-point, through trimmer on the RH probe
RH Probe		HI 70601/2, with built-in temperature sensor and 2 m (6.6') cable (included)
Battery Type / Life		1 x 9V / approx. 100 hours of continuous use
Environment		0 to 50°C (32 to 122°F); RH max 98% non-condensing
Dimensions		185 x 82 x 45 mm (7.3 x 3.2 x 1.8")
Weight		275 g (9.7 oz.)