Direct Connect
LEL / H2 / O2 / CO / H2S Gas Sensors
The RKI Direct Connect series gas sensors are highly reliable and very cost effective for the detection of common gas hazards. The direct connect series are available for LEL, H2 Specific LEL, LEL IR, Oxygen, H2S, CO, CO2, and for a variety of toxic gases. The sensors for LEL, H2, Oxygen, H2S, CO2, and Carbon Monoxide are explosion-proof with flame arrestors, and approved for use in hazardous areas (Class 1, Div. 1 Groups B, C, D). An optional non-explosion proof version is available for oxygen, H2S, CO, and CO2 for use in non-hazardous atmospheres.
The Direct Connect sensors can be used in two different ways. The sensors can be mounted directly to the controllers as a complete stand alone system, or they can be mounted to explosion proof junction boxes for remote detection.
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 are available for NH3, SO2, PH3, AsH3, and HCN.
The Direct Connect sensors can be used either indoors or outdoors. The flame arrestors for the explosion-proof versions utilize a patented coating which make them water repellent. Also, splash guards are available for use in very wet environments. An optional stainless steel junction box is available for corrosive environments.
All of the Direct Connect sensors are designed to specifically interface with RKI Beacon 110, 200, and 410 controllers.
- Available gases include
- LEL, H2S, CO, & CO2
- Toxic sensors include NH3, AsH3, HCN, PH3, and SO2
- Infrared sensor for combustibles and CO2
- Patented water repellent sensor coating
- Explosion proof construction
- Optional stainless steel junction box
- 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
Explosion Proof | |||||||||
LEL General Purpose | LEL H2 Specific | O2 Oxygen | H2S Hydrogen Sulfide | CO Carbon Monoxide | CH4 Methane | HC Hydrocarbons | CO2 Carbon Dioxide | ||
Sensor | 61-1000RK | 61-1001RK | 65-2515RK | 65-2427RK-05 | 65-2437RK-05 | 61-1003RK-CH4 61-1006RK-CH4 | 61-1003RK-HC | 61-1004RK-02 61-1004RK-03 61-1004RK-05 61-1004RK-10 | |
61-1000RK-05 | 61-1001RK-05 | ||||||||
Sensors | Catalytic | Galvanic cell | Electrochemical | Infrared | |||||
Sensor | 61-0140RK (UL) 61-0140RK-05 (CSA) | LEL H2 – NC-6205-01 | 65-2514RK | 65-2428 | 65-2438 | 61-0190RK-CH4 61-0192RK-CH4 | 61-0190RK-HC | 61-0191RK-02 61-0191RK-03 61-0191RK-05 61-0191RK-10 | |
Measuring Range | 0-100% LEL | 0-25% Vol. | 0-100 ppm | 0-300 ppm | 0-100% LEL 0-100% Vol. | 0-100% LEL | -02 -03 -05 -10 | 0 - 5000 ppm 0 - 5.0% Vol. 0 - 50% Vol. 0 - 100% Vol. | |
Lower Detectable Limit (LDL) | 2% of full scale | 0.1% Vol. | 2% of full scale | ||||||
Response | LEL – 30 Seconds | LEL H2 – 20 Seconds | 90 Seconds | 60 Seconds | 90 Seconds | 30 Seconds | 30 Seconds | 30 Seconds | |
Accuracy | +/- 5% of full scale (0.5% volume for oxygen) | ||||||||
Life Expectancy | 2 to 3 years with normal service | 3 to 5 years with normal service | 2 to 3 years with normal service | 5 years plus with normal service | |||||
Operating Environment | |||||||||
Location | Indoor or outdoor. Explosion proof for Class I, Groups B, C, and D atmospheres. | ||||||||
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 | -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 | ||||||||
Approvals | 61-1000RK UL | 61-1001RK UL | CSA NRTL | C UL US | |||||
61-1000RK-05 CSA | 61-1001RK-05 CSA | ||||||||
Controllers | Compatible with the following controllers: Beacon 110, Beacon 200, and Beacon 410A | ||||||||
Warranty | One year materials and workmanship | ||||||||
Non Explosion Proof | |||||
O2 Oxygen | H2S Hydrogen Sulfide | CO Carbon Monoxide | Toxics | CO2 Carbon Dioxide | |
Sensor With J-Box | 65-2497RK *65-2502RK | 65-2498RK | 65-2499RK | See Chart Below | 61-1007RK-02 61-1007RK-03 61-1007RK-05 61-1007RK-10 |
Sensors | Galvanic cell | Electrochemical | Infrared | ||
Sensor Only | 65-2494RK | 65-2495RK | 65-2496RK | See Chart Below | 61-0198RK-02 61-0198RK-03 61-0198RK-05 61-0198RK-10 |
Measuring Range | 0-25% Vol. | 0-100 ppm | 0-300 ppm | 0 - 5000 ppm 0 - 5.0% Vol. 0 - 50% Vol. 0 - 100% Vol. | |
Lower Detectable Limit (LDL) | 0.1% Vol. | 2% of full scale | |||
Response Time (T-90) | 20 seconds or less | 35 seconds or less | 60 seconds or less | 30 seconds or less | |
Accuracy | +/- 5% of full scale (0.5% volume for oxygen) | ||||
Life Expectancy | 2 years with normal service | 2 to 3 years with normal service | 5 years plus with | ||
Operating Environment | |||||
Location | Indoor or outdoor, 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 | ||||
Housing | |||||
Housing J-Box | Cast aluminum, explosion-proof | ||||
Sensor | Aluminum | ||||
Controllers | Compatible with the following controllers: Beacon 110, Beacon 200, and Beacon 410A | ||||
Warranty | One year materials and workmanship | ||||
 | Toxic Transmitter Sensor Ordering Information | |||||
| Part Number With J-Box | Part Number Without J-box | Gas | Range | Resolution | Sensor type | |
| 65-2301RK-NH3 | 65-2300RK-NH3 | Ammonia (NH3) | 0 – 75.0 ppm | 0.1 ppm | ESM -01 | |
| 65-2301RK-AsH3 | 65-2300RK-AsH3 | Arsine (AsH3) | 0 – 1.50 ppm | 0.01 ppm | ESM -01 | |
| 65-2303-CL2 | 65-2302-CL2 | Chlorine (Cl2) | 0 – 3.00 ppm | 0.01 ppm | CT-7 | |
| 65-2303-CL2-10 | 65-2302-CL2-10 | Chlorine (Cl2) | 0 – 10.0 ppm | 0.1 ppm | CT-7 | |
| 65-2303-CLO2 | 65-2302-CLO2 | Chlorine Dioxide (ClO2) | 0 – 1.00 ppm | 0.01 ppm | CT-7 | |
| 65-2301RK-HCN | 65-2300RK-HCN | Hydrogen Cyanide (HCN) | 0 – 15.0 ppm | 0.1 ppm | ESM -01 | |
| 65-2301RK-PH3 | 65-2300RK-PH3 | Phosphine (PH3) | 0 – 1.00 ppm | 0.01 ppm | ESM -01 | |
| 65-2301RK-SO2 | 65-2300RK-SO2 | Sulfur Dioxide (SO2) | 0 – 6.00 ppm | 0.01 ppm | ESM -01 | |
Direct Connect Wiring Matrix | ||
| Sensor | Number of Wires to Controller | Maximum Distance to Controller |
| 18 AWG wire min. | ||
| LEL / CO2 | 4 | 500 ft. |
| Oxygen | 2 | 500 ft. |
| H2S | 2 | 500 ft. |
| CO | 2 | 500 ft. |
| Toxics | 2 | 500 ft. |
Specifications subject to change without notice.
Made in the USA
Direct Connect Literature | |
| Product Datasheet | Operating Manuals |
 Direct Connect Product Datasheet |  Oxygen Detector Operator’s Manual |