This paperless chart recorder provides simultaneous digital and graphical display of relative humidity and temperature. The display also shows dew point, date and time and min/max measurements. Stored readings can be recalled on the display or downloaded to a PC to obtain a permanent record. Provisions for wall mounting or the control panel swivels to act as a desk stand. The user can set audible and visual alarms with high and low limits for humidity and temperature. Comes complete with detachable sensor probe with 1 m cable, RS232 cable with USB adapter, LabView based software, 100 to 240 VAC, 50/60 Hz adapter and 3 AA battery.