SI-200A: Redefining Precision in Adsorption-Sensitive Gas Detection 

SENKO’s SI-200A sets a new benchmark in toxic gas detection, especially for adsorption-sensitive gases, outperforming traditional detectors with its innovative design. 

SI-200A: Intrinsically Safe Fixed Gas Detector for High-Precision Detection 

The SI-200A is SENKO’s intrinsically safe (Ex ia) fixed gas detector engineered for superior performance in detecting toxic gases such as HCl, NH₃, and Cl₂—gases that typically suffer from adsorption delays in conventional flameproof (Ex d) detectors. 

Thanks to its optimized design, the SI-200A overcomes this limitation, delivering faster, more accurate readings and ensuring reliable detection in critical environments. 

Proven Through Controlled Testing 

To validate its performance, SENKO conducted comparative tests using NH₃, Cl₂, and HCl gases. 

Test Protocol: Each gas was introduced for 5 minutes, followed by a 5-minute recovery period. 

Results: 

• HCl: SI-200A demonstrated consistent and immediate detection. 

• NH₃: Accurately tracked concentration levels. 

• Cl₂: Delivered rapid and precise readings. 
   

Key Advantages of the SI-200A 

• Intrinsically safe (Ex ia) design 

• Exceptional accuracy for adsorption-sensitive gases 

• Fast response time and superior sensor precision 

• Ideal for environments handling HCl, NH₃, Cl₂, and other toxic gases 

Recommended Applications 

• Perfect for industries such as oil & gas, semiconductors, chemical processing, and wastewater treatment—any setting that demands precise and reliable toxic gas monitoring. 

• The SI-200A solves a long-standing challenge in toxic gas detection: adsorption-related delays. By eliminating this interference, it delivers a new level of performance for safety-critical applications. As gas monitoring needs grow more sophisticated, the SI-200A leads the way forward.