The INIR-EK4 is an integrated infrared evaluation kit designed for testing and experimental measurements of infrared gas sensors. The kit includes a configuration unit with USB TTL cable, evaluation software (version 3.0.0.0 and above), and comprehensive documentation including datasheets and application notes. The software runs on Windows operating systems (XP, Vista, 7, Server 2003 R2, Server 2008 R2) with minimum requirements of Pentium III/Celeron 866 MHz processor, 1 GB RAM, and 1024 x 768 pixel screen resolution. Key features include real-time sensor readings display, data logging capabilities with graph and table views, calibration routines (zero calibration, span calibration, and offset calculation), and support for multiple connected devices with configurable concentration units (percent or PPM) and temperature display (Celsius or Fahrenheit). The evaluation kit is ideal for production use, research, and development of infrared gas sensing applications.