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| Diffusion Sensor/Transmitter | S-Series |
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Features
Applications
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| The RKI S series gas sensor/transmitters are highly reliable and cost effective basic 4-20 mA transmitters for the detection of common gas hazards. The S series transmitters are available for LEL (catalytic), LEL (IR) CH4, LEL (IR) HC, O2, H2S, CO, or CO2 (IR). The electronics are encased inside a potted package to avoid damage from mechanical abuse or corrosion, and this assembly is installed inside an explosion-proof 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 100 mV to 500 mV 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 (11VDC to 30 VDC), and provides a 4-20mA signal which can be connected to a wide variety of controllers. |
| Part # | LEL 65-2400RK 65-2400RK-05 |
O2 65-2513RK 65-2516RK 65-2504RK* |
H2S 65-2422RK-05 |
CO 65-2432RK-05 |
|---|---|---|---|---|
| Min Operating Voltage |
11 VDC | |||
| Max Operating Voltage |
30 VDC | |||
| Max Current Draw |
200 mA (power wires) 25 mA (signal wires) 3 or 4 wires |
25 mA (2 wire system) |
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| Signal Output | 4 - 20 mA signal | |||
| Response Time |
30 seconds to 90% of concentration |
20 seconds to 90% of concentration |
45 seconds to 90% of concentration | 30 seconds to 90% of concentration |
| Operating Environment | ||||
| Location | Indoor or outdoor. Explosion proof for Class , Div. 1, Groups B, C, and D. |
Indoor or outdoor. Explosion proof housing and intrinsically safe sensor. |
Indoor or outdoor. Explosion proof for Class I, Div. 1, Groups B, C, and D. |
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| Temperature | -40 to 185° F | -4 to 113° F | ||
| Humidity | 0 - 99% RH, non condensing |
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| Housing | Aluminum Explosion proof enclosure |
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| Sensor | ||||
| Type | Catalytic Combustion |
Galvanic Cell | Electrochemical | |
| Life Expectancy | 1 to 2 years with normal intermmittent exposure to flammable gas |
2 years normal service | 2 years normal service when intermittently exposed to H2S | 2 to 3 years normal service |
| Controls | ||||
| Zero | Sets transmitter output to 4 mA with 0% LEL output from combustible sensor | Sets transmitter output to 4 mA with an inert gas (zero) output from O2 sensor |
Sets transmitter output to 4 mA with zero output from H2S sensor |
Sets transmitter output to 4 mA with zero output from CO sensor |
| Span | Sets transmitter output to 20 mA with 100% LEL output from combustible sensor | Sets transmitter output to 17.44 mA with 20.9% Vol. O2 (fresh air) output from O2 sensor | Sets transmitter output to 20 mA with 100 ppm output from H2S sensor | Sets transmitter output to 20 mA with 300 ppm output from CO sensor |
| Part # | CO2 65-2391RK-03 |
CH4 65-2390RK-CH4 |
HC 65-2390RK-HC |
|---|---|---|---|
| Measuring Range | 0-5% Vol. | 0-100% LEL | |
| Max Current Draw |
60 mA (power wires) 25 mA (signal wires) 3 wires |
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| Signal Output | 4 - 20 mA signal | ||
| Response Time |
30 seconds to 90% of concentration | ||
| Operating Environment | |||
| Location | Indoor or outdoor. Explosion proof for Class I, Div. 1, Groups B, C, and D. |
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| Temperature | -4 to 122° F | ||
| Humidity | 0 - 99% RH, non condensing | ||
| Housing | Aluminum Explosion proof enclosure | ||
| Sensor | |||
| Type | Infrared | ||
| Life Expectancy |
5+ years normal service | ||
| Controls | |||
| Zero | Sets transmitter output to 4 mA with zero output from CO2 sensor | Sets transmitter output to 4 mA with 0% LEL output from combustible sensor |
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| Span | Sets transmitter output to 20 mA with 5% volume output from CO2 sensor | Sets transmitter output to 20 mA with 100% LEL output from combustible sensor |
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Operating Voltage
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11 VDC to 30 VDC | ||
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Approvals
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C CSA US | ||
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Warranty
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One year materials and workmanship | ||
* Specifications subject to change without notice
Made in the USA
