The RKI S2 series gas sensor/transmitters are highly reliable and very cost
effective for the detection of common gas hazards. The S2 series are available
for LEL, H2 Specific (LEL, and ppm), Oxygen, H2S, CO, and for a variety of toxic
gases. The transmitters for LEL, H2 Specific, Oxygen, H2 S, CO2, and Carbon
Monoxide are explosion-proof with flame arrestors, and approved for use in
hazardous areas (Class l, Div 1 Groups B, C, D). An optional non-explosion
proof version is available for oxygen, H2S, CO, and CO2 in non-hazardous
atmospheres. LEL sensors are available using catalytic bead and infrared
technologies.

The toxic sensors are electrochemical type plug-in sensors, which provide
high specificity, fast response, and long life. The plug-in design allows quick
replacement in the field with no tools required. Toxic sensors are designed for
use in Class I, Div. 2 hazardous locations. Sensors available for NH3, AsH3,
Cl2, ClO2, HCN, PH3, and SO2.

The S2 transmitters can be used either indoors or outdoors. The flame
arrestors for the explosion-proof versions utilize a patented coating which
make them water repellent. Splash guards are also available for use in
very wet environments. An optional stainless steel junction box is available
for corrosive environments.

All of the S2 transmitters are designed to interface with RKI controllers, or
with PLC/DCS systems.

Features
• Available gases include
     ◦ LEL, H2S, CO, PPM H2, and CO2
     ◦ Toxic gases include NH3, AsH3, Cl2, ClO2, HCN, & SO2
• Infrared sensor for combustibles and CO2
• Hydrogen-Specific now available
• Patented water repellent sensor coating
• 4-20 mA output
• Explosion proof construction
• Optional stainless steel junction box