We offers hygro palm 23 humidity measurement instrument. 2 interchangeable probe inputs2 analogue inputs for 01 vdc or 0(4)20 ma9 v battery (rechargeable option)all psychrometric calculations availablereal time clock with back up batteryprobe adjustment direct to dew point referenceinstrument operating range : 0100%rh -1060cmeasurement range : 0100%rh -100200c (probe dependent)saves up to 16000 measurement pairs (every data record contains humidity, temperature, data, time, batch no. And user id no.)remote control function for transmittersmini usb interface for connection to pc.