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 l, 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, SO2, PH3, AsH3, and HCN.
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, SO2, HCN, and more
- 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 & wastewater treatment plants
- Pulp & paper mills
- Gas, telephone, & electric utilities
- Parking garages
- Manufacturing facilities
- Steel
- Automotive
- Chemical storage buildings
- Explosion Proof Specifications
|
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 |
- Non-Explosion Proof Specifications
|
Non-Explosion Proof
|
O2 Oxygen
|
H2S Hydrogen Sulfide
|
CO Carbon Monoxide
|
Toxics See chart below
|
CO2 Carbon Dioxide
|
| Part # |
65-2321RK |
65-2330RK |
65-2335RK |
See chart
below |
65-2397RK-02
65-2397RK-03
65-2397RK-05
65-2397RK-10 |
| Sensor |
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 |
+/- 5% of full scale (0.5% volume for oxygen) |
| Life Expectancy |
2 years normal
service |
2 to 3 years with normal service |
5 years plus with
normal service |
| Response Time (T-90) |
20 Seconds |
45 Seconds |
30 Seconds |
60 Seconds |
30 Seconds |
|
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 |
-4°F to 122°F -20°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 410, and 800, also PLC and DCS systems |
| Warranty |
One year materials and workmanship |
 |
Non Explosion Proof Toxic Assemblies
|
|
Ordering Information
|
|
Part Number
|
Gas
|
Range
|
| 65-2340RK-ASH3 |
Arsine (AsH3) |
0 - 1.5 ppm |
| 65-2340RK-NH3 |
Ammonia (NH3) |
0 - 75 ppm |
| 65-2340RK-Cl2 |
Chlorine (Cl2) |
0 - 3.00 ppm |
| 65-2340RK-HCN |
Hydrogen Cyanide (HCN) |
0 - 15 ppm |
| 65-2340RK-PH3 |
Phosphine (PH3) |
0 - 1.00 ppm |
| 65-2340RK-SO2 |
Sulfur Dioxide (SO2) |
0 - 6.00 ppm |
|