The RKI Model 35-3001 is a sample-draw fixed gas detector built around an internal pump, letting a single sensor head reach into tanks, ducts, or vaults rather than diffusing gas to a wall-mounted point. It's factory-configured for one or two simultaneous gases from a wide sensor library — catalytic or IR combustibles, hydrogen-specific LEL, oxygen, H2S, CO, and IR CO2 across several ranges — and RKI builds dozens of single- and dual-gas combinations to order.

A no-sensor, pump-only version is also available for facilities adding their own remote sensor later, and remote-transmitter versions of every configuration exist for installations that need to separate the sensor head from the electronics. The 35-3001 integrates with RKI Beacon controllers or any 4-20mA-compatible system.