Cel-Mar Zakład Informatyki I Elektroniki

CEL-MAR Sp. Jawna is a Polish manufacturer and designer of serial data transmission equipment and interface converters headquartered in Kielce. The company specializes in developing high-reliability communication hardware including RS232, RS485, RS422, Current Loop, USB, Ethernet, Wi-Fi, Fiber Optic, and 1-Wire converters. Its extensive product catalog encompasses signal isolators, repeaters, hubs, protocol converters, and addressable interface modules. These hardware solutions facilitate seamless integration across diverse industrial protocols such as Modbus RTU, Modbus TCP, PROFIBUS, PELCO, and IEC 62056-21. CEL-MAR also manufactures digital environmental sensors, temperature transducers, A/D converters, and I/O expansion modules. Designed for demanding applications in industrial automation, railway control systems, power metering, telemechanics, and access control, its devices ensure robust network connectivity. In addition to hardware production, CEL-MAR provides technical support, device testing, and lifetime repair service for its entire product range. Operating nationwide and internationally, the enterprise supplies engineers and system integrators with industrial-grade networking solutions.