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Fixed Gas Detection

GD-F4A-A Rugged Aspirator Type Oxygen Detector

Gas Detector head for Oxygen with Aspirator adapter

Direct Connect Oxygen Monitoring Detector head :

The Riken Keiki GD-F4-AA is a Detector Head with Direct connect sensor for use in Oxygen Monitoring applications.  It Features a range of 0-25% Volume as well as having options for 0-50% volume. The GD-F3-AA is designed to be connected to the RM-5000 or RM-6000 Monitor panels. It has a Compact & light weight design and Splash-proof construction as well as being Intrinsically safe with a zener barrier. GD-F4A-A is designed for use with an pump in an Aspirated system.

GD-F4a-a drawing


Sampling method

Suction type

Principle of detection

Membrane Type Galvanic Cell Method

Detection range

0 to 25.0 vol%

Explosion protected construction

Intrinsic safety

Explosion-proof class

Japan Ex : Ex ia ⅡC T4 X (with zener barrier used)


Japan Ex


Approx. 140 (W) x 175 (H) x 86(D) mm [GD-F4A-A]
Approx. 140 (W) x 175 (H) x 95(D) mm [GD-F4A-SC-A]


Approx. 1.7 kg (General spec.)[GD-F4A-SC-A]
Approx. 1.8 kg (Stainless steel spec.)[GD-F4A-A]
Approx. 2.0 kg (Stainless steel spec.)[GD-F4A-SC-A]

Operating temperature range

-10 ℃ to +40 ℃ (no sudden changes)

Operating humidity range

0 to 95 %RH (no condensation)

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