Riken Keiki GD-K8A Gas Detector

The GD-K8A is a diffusion-type detector head from RIKEN KEIKI that functions as a 4–20 mA transmitter for fixed gas detection systems. Designed to be mounted as the sensing head in industrial safety networks, it passes a current proportional to the detected gas concentration to the control system, where preset alarms and interlocks can be triggered. The diffusion sampling approach enables reliable monitoring at typical room or process ambient conditions without requiring an active pump, and the 4–20 mA output integrates with common industrial controllers and annunciation architectures. The GD-K8A is part of RIKEN KEIKI’s fixed gas detector family, intended for environments where hazardous gas detection is essential for safety and regulatory compliance. When selecting a detector head, users typically pair it with compatible sensor modules and controllers in order to tailor gas selectivity and alarm thresholds to their specific application. The GD-K8A’s compact form factor and standard electrical interface help simplify installation in existing detector cabinets or instrument housings, while maintaining the rugged design characteristics expected from RIKEN KEIKI equipment.