From RKI Instruments,
The RKI "S" Series gas sensor/transmitters, a highly reliable and cost effective basic 4-20 mA transmitters for detection of common gas hazards. The "S" series transmitters are available for LEL, O2, H2S, CO, CO2 or for 0 - 2,000 ppm Hydrocarbon detection (for various fuels or solvents). The electronics are encased inside a potted package to avoid damage from mechanical abuse or corrosion, and the amplifier is installed inside an explosionproof enclosure.
All sensors are explosion-proof with flame arrestors and approved for use in hazardous atmospheres. There is also an optional version for oxygen for use in non-hazardous atmospheres. The only tools required to calibrate the "S" series are a voltmeter, screwdriver, and cal gas. The zero and calibration functions are performed by adjusting potentiometers on the amplifiers. The amplifier has test jacks for connecting to a voltmeter for calibration purposes, and the sensor response is viewed on the voltmeter as a 100mV to 500mV signal.
Field calibration can be performed easily and quickly by one person. The "S" series transmitters can be used either indoors or outdoors. The flame arrestors utilize a patented coating which make them water repellent, and splash guards are also available for use in very wet environments. The transmitter operates from 24 VDC (10.5VDC to 30 VDC), and provides a 4-20mA signal which can be connected to a wide variety of controllers.
Available Configurations:
Part Number: Description:
65-2400RK S-Series LEL sensor (catalytic) / transmitter with explosion proof j-box, UL version
65-2400RK-05 S-Series LEL sensor (catalytic) / transmitter with explosion proof j-box, CSA version
65-2450RK S-Series LEL Hydrogen (H2) specific sensor / transmitter with explosion proof j-box, UL version
65-2450RK-05 S-Series LEL Hydrogen (H2) specific sensor / transmitter with explosion proof j-box, CSA version
65-2390RK-CH4 S-Series Methane (CH4) 0-100% LEL, IR sensor / transmitter with j-box, UL version
65-2390RK-HC S-Series Hydrocarbon (isobutane) 0-100% LEL, IR sensor / transmitter with j-box, UL version
65-2516RK S-Series Oxygen (O2) sensor (capillary type) / transmitter, explosion proof with conduit mounting and j-box, CSA version
65-2422RK-05 S-Series Hydrogen Sulfide (H2S) sensor / transmitter with explosion proof j-box, CSA version
65-2432RK-05 S-Series Carbon Monoxide (CO) sensor / transmitter with j-box, CSA version
65-2391RK-02 S-Series Carbon Dioxide (CO2) 0-5,000 ppm, IR sensor / transmitter with j-box, UL version
65-2391RK-03 S-Series Carbon Dioxide (CO2) 0-5%, IR sensor / transmitter with j-box, UL version
65-2391RK-05 S-Series Carbon Dioxide (CO2) 0-50%, IR sensor / transmitter with j-box, UL version
