OPTOPROG is an optical communication interface designed to configure WM20, WM30, WM40, WM50, ET112, ET330, and ET340 analyzers and monitor their measurements in real-time. The device features bidirectional infrared communication via an optical port with Modbus RTU protocol support, complemented by Bluetooth 2.0/2.1/3.0/4.0 connectivity and a Micro-USB B port for direct PC connection. It is powered by a built-in 4.44 Wh lithium-ion battery providing up to 20 days of autonomy, with no external power supply required, and incorporates sleep mode for energy efficiency. The lightweight design (140 g) with IP51 front protection and mechanical mounting makes it ideal for field work in difficult conditions and limited spaces, eliminating the need for additional wiring or serial port installation while maintaining safe operation.