The Testo 623 (0560 6230) Hygrometer is a reliable device manufactured by Testo for measuring humidity levels. It features a histogram function that allows users to view historical readings over a certain period of time, providing valuable insights into the humidity trends in a particular environment. This hygrometer is designed to provide accurate and consistent measurements, making it a useful tool for various applications in industries such as business and industrial settings.

Used, but in excellent functional shape.