Riken Keiki SD-3GH series Fixed Gas Detector

The Riken Keiki SD-3GH Series are fixed explosion - proof gas detectors designed to continuously monitor the surrounding atmosphere for combustible gases, toxic gases, and oxygen. These detectors can identify gas leaks and trigger an alarm once preset concentration levels are surpassed. The detected gas concentrations are converted and then output as 4 – 20 mA analogue and digital HART signals. There are several output options available, such as Modbus (RS - 485) communication and the utilization of three relays.

The sampling method includes both suction and diffusion. The detection principle is the semi - conductor method. The explosion - protected construction features flameproof enclosures. It has an IP rating of IP66/67 and is CE marked for EMC, LVD, ATEX, and RoHS. The power supply is 24 VDC (with a range of 18 to 30 VDC). The dimensions are 171 (W)×289 (H)×127 (D) mm, and it weighs 7.0 kg. The target gases include ethylene oxide, carbon disulfide, carbonyl sulfide, and hydrogen sulfide.

Specification of Riken Keiki SD-3GH

Sampling method Suction and Diffusion

Principle of detection Semi-Conductor Method

Explosion protected construction Flameproof enclosures

IP Rating IP66/67

CE marking EMC / LVD / ATEX / RoHS

Power 24 VDC (18 to 30 VDC)

Dimensions 171(W)× 289(H) ×127(D) mm

Weight 7.0 kg

Target gas Ethylene oxide, Carbon disulfide, Carbonyl sulfide, Hydrogen Sulfide

The robust housing construction, made of stainless steel with a protection rating equivalent to IP66/67, enables the detector to be used within a wide temperature range from - 40 to + 70 °C. Different mounting types, like wall - mounted, pole - mounted, and duct - mounted, are available, which support diverse applications and installation environments. These globally - available products are certified as explosion - proof in various countries and fulfill the requirements of multiple international standards, including IEC/EN - performance and SIL 2 certification.