Riken Keiki GD-3EC, Technical Manual

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2. Important Safety Information 2-4 Safety information
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
The SD-3SC is used with a remote sensor head (GD-3) from among the following models:
Detection principle (Detection method: Diffusion type)
Model
GD-3
(Remote sensor head)
SD-3
Optical sensor Non-dispersive infrared absorption
type (infrared type) GD-3RI
SD-3SC
Solid state sensor Semiconductor type GD-3GH
GD-3GHS
New ceramic type GD-3NC
Hot-wire semiconductor type GD-3SP
Electrochemical sensor Electrochemical type GD-3EC
GD-3ECS
GD-3ECB
WARNING

The SD-3EC and GD-3EC models are subdivided by the type of explosion-proof construction of the
flame arrester fitted to the sensor and whether they include an EC barrier.
The expected explosion-proof performance cannot be ensured if the incorrect flame arrestor is used. Do
not replace with a different flame arrester.

The SD-3GH and GD-3GH models are subdivided by the type of explosion-proof construction of the
flame arrester fitted to the sensor.
The expected explosion-proof performance cannot be ensured if the incorrect flame arrestor is used. Do
not replace with a different flame arrester.