These digital burettes (burets) are designed for titrating in water treatment plants, material testing facilities and analytical laboratories. Integral solar panels eliminate the need for charging or changing batteries and allow for enhanced portability even in limited-lighting conditions. Easy-to-use recirculating system quickly primes the burette reducing loss of valuable reagents. Features a large LCD, user-friendly keypad, Quick-Cal individual calibration and indicator arrows to provide filling and titration direction. The hand wheels are equipped with a soft touch surface and smooth opertaing gear ensuring precise delivery of your solution. The RS-232 interface allows you to download data to your computer. RS-232 port included for computer interface. Interface cable sold separately. Valves are easily dismantled and exchangeable with provided wrench. Note: Not for use with hydrofluoric acid. Autoclavable to 250°F (121°C). What's included:recirculating tube, suction tube, thread adapters, and individual test certificate