The RKI S2 series of gas sensor/transmitters from RKI Instruments provide reliable, cost-effective detection of common gas hazards. Available for LEL, H2 Specific (LEL and ppm), oxygen, H2S, CO, and a variety of toxic gases, the S2 series can be used either indoors or out, and are designed to be used with RKI controllers such as the , , Beacon 410, or , or with PLC/DCS systems. S2 sensors provide an extremely high degree of accuracy, quick response, and long service life. The plug-in design allows sensors to be easily replaced in the field without tools.

Key Features:

• Available gases include LEL, H2S, CO, PPM H2, and CO2
• Toxic gases include Cl2, NH3, SO2, HCN, and more
• Infrared sensor for combustibles and CO2
• Hydrogen-specific LEL is available
• Patented water repellent sensor coating
• 4-20 mA output
• Explosion proof construction

Description: LEL General Purpose

• Measuring Range: 0-100 percent LEL
• Accuracy: /-5 percent of reading or 2 percent LEL
• Lower Detectable Limit (LDL): 2 percent of full scale
• Response Time: 30 seconds
• Life Expectancy: 2-3 years with normal exposure to natural gas
• Part Number: 65-2405RK

Description: LEL, H2 Specific

• Measuring Range: 0-100 percent LEL (H2 Specific)
• Accuracy: /-5 percent of reading or 2 percent LEL
• Lower Detectable Limit (LDL): 2 percent of full scale
• Response Time: 20 seconds
• Life Expectancy: 3-5 years with normal service
• Part Number: 65-2451RK

Description: H2 PPM, Hydrogen

• Measuring Range: 0-1000 ppm, 0-2000 ppm
• Accuracy: /-5 percent of reading or 2 percent LEL
• Lower Detectable Limit (LDL): 2 percent of full scale
• Response Time: 45 seconds
• Life Expectancy: 5 years with normal service
• Part Numbers: 65-2442RK-1000 - 0-1000 ppm 65-2442RK-2000 - 0-2000 ppm

Description: Oxygen (O2)

• Measuring Range: 0-25 percent
• Accuracy: /-0.5 percent O2
• Lower Detectable Limit (LDL): 0.1 percent volume
• Response Time: 20 seconds
• Life Expectancy: 2-3 years with normal service
• Part Number: 65-2322RK

Description: Hydrogen Sulfide (H2S)

• Measuring Range: 0-100 ppm
• Lower Detectable Limit (LDL): 2 percent of full scale
• Response Time: 45 seconds
• Life Expectancy: 2-3 years with normal service
• Part Number: 65-2331RK

Description: Carbon Monoxide (CO)

• Measuring Range: 0-300 ppm
• Lower Detectable Limit (LDL): 2 percent of full scale
• Response Time: 30 seconds
• Life Expectancy: 2-3 years with normal service
• Part Number: 65-2336RK

Description: Methane (CH4)

• Measuring Range: 0-100 percent LEL
• Accuracy: /- 5 percent of reading or /- 2 percent of full scale
• Lower Detectable Limit (LDL): 2 percent of full scale
• Response Time: 30 seconds
• Life Expectancy: 5 years with normal service
• Part Number: 65-2394RK-CH4

Description: Hydrocarbons (HC)

• Measuring Range: 0-100 percent LEL
• Accuracy: /- 5 percent of reading or /- 2 percent of full scale
• Lower Detectable Limit (LDL): 2 percent of full scale
• Response Time: 30 seconds
• Life Expectancy: 5 years with normal service
• Part Number: 65-2394RK-HC

Description: Carbon Dioxide (CO)

• Measuring Range: 0-5000 ppm, 0-5.0 percent Vol., 0-50 percent Vol., 0-100 percent Vol.
• Lower Detectable Limit (LDL): 2 percent of full scale
• Response Time: 30 seconds
• Life Expectancy: 5 years with normal service
• Part Numbers: 65-2396RK-02 - 0-5000 ppm 65-2396RK-03 - 0-5.0 percent Vol. 65-2396RK-05 - 0-50 percent Vol. 65-2396RK-10 - 0-100 percent Vol.

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