The RIKEN KEIKI OS-BM1 is a high-performance galvanic-cell type oxygen sensor element designed as a direct replacement probe for Riken Keiki portable multi-gas detectors, including the widely used GX-8000 series. Engineered for precision and reliability in critical safety environments, this sensor features a durable cylindrical body equipped with secure pin-type electrical terminals for seamless integration. The unit contains an internal electrolyte necessary for accurate oxygen measurement. For safety purposes, users are cautioned never to disassemble the sensor, and to wash immediately with fresh water in the unlikely event of skin contact with the electrolyte. Each OS-BM1 sensor is supplied in secure, transparent blister packaging to ensure it arrives in optimal condition.