HL-NT multi-channel temperature and humidity recorder is a powerful and technologically advanced recorder. It can work independently without software or with HW4 software. HL-NT has a compact standard independent module, temperature and humidity integrated measurement display, alarm function, precise temperature and humidity measurement and good short-term and long-term stability, can be connected to ROTRONIC's various interchangeable digital sensors, IP65 protection grade, has a certain anti-vibration ability, 9V laminated battery (can be used with a rechargeable battery) or external power supply, CF card storage memory, realize the unlimited memory of data, FDA CFR21/11 and GAMP 4 certification, optional expansion base: expandable 4-way digital temperature and humidity sensors or 4-way PT100 and 2-way switch quantity input and other features.