SENKO Achieves CSA/UL Certification for SI-200E / SI-200A 

SENKO Co., Ltd., a global leader in gas safety solutions, has successfully obtained CSA (Canada) and UL (United States) certifications for its fixed gas detector models SI-200E and SI-200A. 

This certification confirms that the SI-200 series meets North American standards for explosion-proof and electrical safety. Following IECEx and ATEX approvals, this milestone further strengthens SENKO’s competitiveness in the global gas detection market. 

CSA/UL Certification Details  

▪ Applicable Standards: CSA C22.2, UL 60079 series, CSA/UL 61010-1 

▪ Models: SI-200E & SI-200A 

▪ Electrical Ratings: DC 24V, 3.6W (SI-200A additionally supports Um=250V) 

▪ Operating Temperature: -40°C to +60°C 

▪ Ingress Protection: IP66 (with splash guard) 

Product Highlights 

SI-200E 

▪ Explosion-proof rating: Ex db IIC T6 Gb, Class I Div 1 (Groups A–D, Canada) 

▪ Equipped with a 4-digit LED display showing gas concentration, alarms, and self-diagnostic results 

▪ Supports 4–20mA analog output, RS-485 digital communication, optional HART protocol, optional GT Guardian Cloud System 

▪ Wireless connectivity for convenient configuration and remote adjustments 

▪ Built-in dual alarm relays (1st Alarm, 2nd Alarm, Fault Alarm, rated 2.0A @30VDC) 

SI-200A

▪ Intrinsically safe rating: Ex ia IIC T4 Gb, Class I Div 1 (Groups A–D, Canada) 

▪ Designed with an intrinsic safety (ia) protection structure for highly hazardous zones 

▪ Provides fast and accurate detection of toxic gases such as HCl, NH3, and Cl2.  

▪ Supports 4–20mA analog output, RS-485 digital communication, optional HART protocol, optional GT Guardian Cloud System 

▪ Wireless connectivity for convenient configuration and remote adjustments 

▪ Optimized for low-power, intrinsically safe operations in sensitive environments 

Both models are certified for installation in hazardous areas (Zone 1 and Zone 21) and are ideally suited for: Petrochemical plants, Gas storage facilities, Power plants, Industrial sites with explosion risks 

With the CSA and UL certifications, SENKO has officially demonstrated the safety and reliability of its products in the North American market. This achievement paves the way for stronger participation in regional projects and global EPC (Engineering, Procurement, Construction) contracts. Moving forward, SENKO will continue to advance product development and expand international certifications to reinforce its leadership in the global gas detection industry.