Description
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, 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.
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, AsH3, Cl2, ClO2, HCN, PH3, and SO2.
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.
Related Services
Fixed Systems Turnkey Solutions
- Design, Consultations, and Engineering
- Installation
- Start-up
- Training
- System Maintenance
Specifications
Explosion Proof – Class I, Div. 1 , Groups B, C, D
| |
LEL
General Purpose |
LEL
H2 Specific |
H2 PPM
Hydrogen
MOS |
O2
Oxygen |
H2S
Hydrogen Sulfide |
CO
Carbon Monoxide |
CH4
Methane IR |
HC
Hydrocarbons IR |
CO2
Carbon Dioxide IR |
| Part # |
65-2405RK
|
65-2451RK
|
65-2443-500
65-2443-1000
65-2443-2000
|
65-2322RK
|
65-2331RK
|
65-2336RK
|
65-2394RK-CH4
|
65-2394RK-HC
|
65-2396RK-02
65-2396RK-03
65-2396RK-05
65-2396RK-10
|
|
65-2405RK-05
|
65-2451RK-05
|
| Sensor |
Catalytic
|
Metal oxide
semiconductor
|
Galvanic cell
|
Electrochemical
|
Infrared
|
| Measuring Range |
0-100% LEL
|
0-100% LEL
(H2 Specific)
|
0-100 ppm
0-500 ppm
0-1000 ppm
0-2000 ppm
|
0-25% Vol.
|
0-100 ppm
|
0-300 ppm
|
0-100% LEL
|
0 – 5000 ppm
0 – 5% Vol.
0 – 50% Vol.
0 – 100% Vol.
|
| Lower Detectable Limit (LDL) |
2% of full scale
|
0.1% Vol.
|
2% of full scale
|
Accuracy
(whichever is greater) |
± 5% of
reading or
± 2% LEL
|
± 10% of full scale
|
±0.5% O2
|
± 5% of
reading
± 2 ppm H2S
|
± 5% of
reading
± 5 ppm CO
|
± 5% of
reading or
± 2% of full scale
|
| Response Time (T-90) |
30 Seconds
|
20 Seconds
|
45 Seconds
|
90 Seconds
|
60 Seconds
|
90 Seconds
|
30 Seconds
|
| Max Current Draw (24VDC) |
70 mA (power wires) 25 mA (signal wires) 3 wires
|
25 mA max, 2 wires
|
60 mA (power wires)
25 mA (signal wires) 3 wires
|
Life
Expectancy |
2 to 3 years with normal exposure to flammable gas
|
3-5 years with normal service
|
5 years plus with normal service
|
2-3 years 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 104°F
-20°C to 40°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
|
-40°F to 122°F
-40°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 |
11 VDC to 30 VDC
|
19 VDC to 30 VDC
|
19-30VDC (250 OHMS
impedance max)
|
11 VDC to 30 VDC
|
| Approvals |
65-2405RK
UL
|
65-2451RK
UL
|
65-2443-500
65-2443-1000
65-2443-2000
UL
|
CSA NRTL
|
C UL US
|
|
65-2405RK-05
CSA
|
65-2451RK-05
CSA
|
65-2443-500-05
65-2443-1000-05
65-2443-2000-05
CSA
|
| 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 |
Toxic Gas Transmitters – Class I, Div. 2
| |
O2
Oxygen
|
H2S
Hydrogen Sulfide
|
CO
Carbon Monoxide
|
Toxics
See chart below
|
CO2
Carbon Dioxide
|
| Part # |
65-2320RK
|
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
(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 |
S2 Non Explosion Proof Toxic Assemblies
|
| Part Number With J-Box |
Gas |
Range |
Resolution |
Sensor Type |
| 65-2340RK-NH3 |
Ammonia (NH3)* |
0 – 75.0 ppm |
0.1 ppm |
ESM -01 |
| 65-2341-NH3-75 |
Ammonia (NH3) |
0 – 75.0 ppm |
0.1 ppm |
CT-7 |
| 65-2341-NH3-1 |
Ammonia (NH3) |
0 – 100 ppm |
1 ppm |
CT-7 |
| 65-2341-NH3-2 |
Ammonia (NH3) |
0 – 200 ppm |
1 ppm |
CT-7 |
| 65-2341-NH3-5 |
Ammonia (NH3) |
0 – 500 ppm |
1 ppm |
CT-7 |
| 65-2340RK-AsH3 |
Arsine (AsH3) |
0 – 1.50 ppm |
0.01 ppm |
ESM -01 |
| 65-2341-CL2-3 |
Chlorine (Cl2) |
0 – 3.00 ppm |
0.01 ppm |
CT-7 |
| 65-2341-CL2-05 |
Chlorine (Cl2) |
0 – 5.00 ppm |
0.02 ppm |
CT-7 |
| 65-2341-CL2-10 |
Chlorine (Cl2) |
0 – 10.0 ppm |
0.1 ppm |
CT-7 |
| 65-2341-CLO2-1 |
Chlorine Dioxide (ClO2) |
0 – 1.00 ppm |
0.01 ppm |
CT-7 |
| 65-2340RK-HCN |
Hydrogen Cyanide (HCN) |
0 – 15.0 ppm |
0.1 ppm |
ESM -01 |
| 65-2340RK-PH3 |
Phosphine (PH3) |
0 – 1.00 ppm |
0.01 ppm |
ESM -01 |
| 65-2340RK-SO2 |
Sulfur Dioxide (SO2) |
0 – 6.00 ppm |
0.01 ppm |
ESM -01 |
S2 Wiring Matrix
|
| S2 Transmitter |
Number of Wires to Controller |
Maximum Distance to Controller |
| 18 AWG wire |
16 AWG wire |
14 AWG wire |
| LEL / IR / CO2 |
3 |
2500 ft. |
5,000 ft. |
8,000 ft. |
| Oxygen |
2 |
2500 ft. |
5,000 ft. |
8,000 ft. |
| H2S |
2 |
2500 ft. |
5,000 ft. |
8,000 ft. |
| CO |
2 |
2500 ft. |
5,000 ft. |
8,000 ft. |
| Toxics |
2 |
2500 ft. |
5,000 ft. |
8,000 ft. |
Specifications subject to change without notice.
Made in the USA
