S2 Series Diffusion Sensor / Transmitter
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, H2S, CO2, and Carbon Monoxide are explosion-proof with flame arrestors, and approved for use in hazardous areas (Class I, 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 J-Box (junction box) is needed for remote runs away from the controller.
The S2 transmitters can be used either indoors or outdoors. The flame arrestors for the explosion-proof versions utilized 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
- 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
Applications:
- Petrochemical plants
- Refineries
- Gas Plants
- Offshore Drilling Platforms
- Water and wastewater treatment plants
- Pulp & paper mills
- Gas, telephone & electric utilities
- Parking garages
- Manufacturing facilities
- Steel
- Automotive
- Chemical storage buildings
Download Product Datasheet (PDF) click here
S2 Series Diffusion Sensor / Transmitter
Explosion Proof | LEL
General Purpose | LEL
H2 Specific | O2
Oxygen | H2S Hydrogen Sulfide | CO Carbon Monoxide |
| Part # | 65-2405RK | 65-2451RK | 65-2322RK | 65-2331RK | 65-2336RK |
| 65-2405RK-05 | 65-2451RK-05 |
| Sensor | Catalytic | Galvanic cell | Electrochemical |
| Measuring Range | 0-100% LEL | 0-100% LEL (H2 Specific) | 0-25% Vol. | 0-100 ppm | 0-300 ppm |
| Lower Detectable Limit (LDL) | 2% of full scale | 0.1% Vol. | 2% of full scale |
| Max Current Draw (24VDC) | 200 mA (power wires) 25 mA (signal wires)
3 wires | 20 mA max, 2 wires |
| Response Time (T-90) | 30 Seconds | 20 Seconds | 20 Seconds | 45 Seconds | 30 Seconds |
| Accuracy | +/- 5% of full scale (0.5% volume for oxygen) |
Life
Expectancy | 2 to 3 years with normal exposure to flammable gas | 3-5 years with normal service | 2-3 years with normal service |
Operating Environment |
| Location | Indoor or outdoor. Explosion proof for Class I, Div. 1, Groups B, C, and D. |
| Temperature | -40°F to 167°F -40°C to 75°C | -4°F to 113°F -20°C to 45°C | -40°F to 104°F -40°C to 40°C | 23°F to 104°F -5°C to 40°C |
| Humidity | 0 - 99% RH, non condensing |
Housing |
| Housing J Box | Cast aluminum explosion proof, optional stainless steel J-box available |
| Sensor | Stainless steel explosion proof |
Controls |
| Zero | Sets transmitter output to 4 mA with zero output from sensor |
| Span | Sets transmitter output to proper level when span gas is applied |
| Output | 4 - 20 mA signal |
| Operating Voltage | 11 VDC to 30 VDC | 19-30VDC (250 OHMS impedance max) |
| Approvals | 65-2405RK UL | 65-2451RK UL | CSA NRTL |
65-2405RK-05
C CSA US | 65-2451RK-05
C CSA US |
| Controllers | Compatible with the following controllers: Beacon 110, Beacon 200, Beacon 410, and 800, also PLC and DCS systems |
| Warranty | One year materials and workmanship |
Explosion Proof | MOS | IR |
| H2 PPM
Hydrogen | CO2
Carbon Dioxide | CH4
Methane | HC
Hydrocarbons |
| Part # | 65-2442RK-1000
65-2442RK-2000
| 65-2396RK-02
65-2396RK-03
65-2396RK-05
65-2396RK-10 | 65-2394RK-CH4 | 65-2394RK-HC |
| Sensor | Metal oxide
semiconductor | Infrared |
| Measuring Range | 0-1000 ppm
0-2000 ppm | 0 - 5000 ppm
0 - 5% Vol.
0 - 50% Vol.
0 - 100% Vol. | 0-100% LEL |
| Lower Detectable Limit (LDL) | 2% of full scale |
| Max Current Draw (24VDC) | 200 mA (power wires) 25 mA (signal wires) 3 wires | 60 mA (power wires) 25 mA (signal wires) 3 wires |
Response Time
(T-90) | 45 Seconds | 30 Seconds |
| Accuracy | ± 10% of
reading or
± 5% of full scale | ± 5% of reading or
± 2% of full scale |
Life
Expectancy | 5 years plus with normal service | 5 years plus with normal service |
Operating Environment |
| Location | Indoor or outdoor. Explosion proof for Class I, Div. 1, Groups B, C, and D. |
| Temperature | -40°F to 167°F
-40°C to 75°C | -4°F to 122°F -20°C to 50°C |
| Humidity | 0 - 99% RH, non condensing |
| Housing |
| Housing J Box | Cast aluminum explosion proof, optional stainless steel J-box available |
| Sensor | Stainless steel explosion proof |
Controls |
| Zero | Sets transmitter output to 4 mA with zero output from sensor |
| Span | Sets transmitter output to proper level when span gas is applied |
| Output | 4 - 20 mA signal |
| Operating Voltage | 19 VDC to 30 VDC | 11 VDC to 30 VDC |
| Approvals | UL | C UL US |
| Controllers | Compatible with the following controllers: Beacon 110, Beacon 200, Beacon 410, and 800, also PLC and DCS systems |
| Warranty | One year materials and workmanship |
S2 Series Diffusion Sensor / Transmitter
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