S2 Series – Gas Sensor/Transmitter
002761-HW-RKI-061
Overview
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.
| Sensor | Partial Pressure Galvanic cell | Electrochemical | Infrared | ||
| Measuring Range | 0-25% Vol. | 0-100 ppm | 0-300 ppm | See chart below | 0 – 5000 ppm 0 – 5% Vol. 0 – 50% Vol. 0 – 100% Vol. |
| Lower Detectable Limit (LDL) | 0.1% Vol. | 2% of full scale | |||
Accuracy
(whichever is greater) | ± 0.5% O2 | ± 5% of reading ± 2 ppm H2S | ± 5% of reading ± 5 ppm CO | ± 10% of reading or ± 5% of full scale | ± 5% of reading or ± 2% of full scale |
| Response Time (T-90) | 20 Seconds | 45 Seconds | 30 Seconds | 60 Seconds | 30 Seconds |
| Max Current Draw (24VDC) | 25 mA max, 2 wires | 60 mA (power wires) 25 mA (signal wires) 3 wires | |||
| Life Expectancy | 2 years normal service | 2 to 3 years with normal service | 5 years plus with normal service | ||
| Operating Environment | |||||
| Location | Indoor Class I, Div. 2 | ||||
| Temperature | -4°F to 122°F -20°C to 50°C | 14°F to 104°F -10°C to 40°C | -40°F to 122°F -40°C to 50°C | ||
| Humidity | 0 – 99% RH non condensing | 5-95% RH | 0 – 99% RH non condensing | ||
| Housing | |||||
| Housing J-Box | Cast aluminum, explosion-proof | ||||
| Sensor | Plastic or aluminum | ||||
| Controls | |||||
| Zero | Sets transmitter output to 4 mA with zero output from sensor | ||||
| Span | Sets transmitter output to 20 mA with full scale output from sensor | ||||
| Operating Voltage | 19 VDC to 30 VDC | ||||
| Output | 4-20 mA signal | ||||
| Controllers | Compatible with the following controllers: Beacon 110, Beacon 200, Beacon 410A, and 800, also PLC and DCS systems | ||||
| Warranty | One year materials and workmanship | ||||
The transmitters for LEL, H2 Specific, Oxygen, H2S, 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 Class 1 Div 2. LEL sensors are available using catalytic bead and infrared technologies.