Direct Connect Sensors

Direct Connect 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 Class 1 Div 2.

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, AsH3, Cl2, ClO2, HCN, PH3, and SO2.

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 410A controllers.
  • Available gases include
    • LEL, H2S, CO, & CO2
    • Toxic sensors include NH3, AsH3, Cl2, ClO2, HCN, & SO2
  • Infrared sensors 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 Class I, Div. 2, Groups B, C, D
 LEL (General Purpose)LEL (H2 Specific)O2 (Oxygen)H2S (Hydrogen Sulfide)CO (Carbon Monoxide)
CH4 (Methane IR)HC (Hydrocarbons IR)CO2 (Carbon Dioxide IR)
Sensor With J-Box61-1000RK (UL)61-1001RK (UL)65-2515RK65-2427RK-0565-2437RK-0561-1003RK-CH461-1003RK-HC61-1004RK-02
61-1000RK-05 (CSA)61-1001RK-05 (CSA)61-1006RK-CH461-1004RK-03
61-1004RK-05
61-1004RK-10
SensorsCatalyticGalvanic cellElectrochemicalInfrared
Sensor Only61-0140RK (UL)NC-6205-01 (UL)65-2514RK65-242865-243861-0190RK-CH461-0190RK-HC61-0191RK-02
61-0140RK-05 (CSA)NC-6205-05 (CSA)61-0192RK-CH461-0191RK-03
61-0191RK-05
61-0191RK-10
Measuring Range0-100% LEL0-25% Vol.0-100 ppm0-300 ppm0-100% LEL0-100% LEL-02: 0 - 5000 ppm
0-100% Vol.-03: 0 - 5.0% Vol.
-04: 0 - 50% Vol.
-05: 0 - 100% Vol.
Lower Detectable Limit (LDL)2% of full scale0.1% Vol.2% of full scale
Response Time (T-90)30 Seconds20 Seconds90 Seconds60 Seconds90 Seconds30 Seconds30 Seconds30 Seconds
Accuracy+/- 5% of full scale (0.5% volume for oxygen)
Life Expectancy2 to 3 years with normal service3 to 5 years with normal service2 to 3 years with normal service5 years plus with normal service
Operating Environment
LocationIndoor or outdoor. Explosion proof for Class I, Groups B, C, and D atmospheres.
Temperature40°F to 167°F-4°F to 113°F-40°F to 104°F23°F to 104°F-40°F to 122°F
-40°C to 75°C-20°C to 45°C-40°C to 40°C-5°C to 40°C-40°C to 50°C
Humidity0 - 99% RH non condensing
Housing
Housing J-BoxCast aluminum, explosion-proof. Optional stainless steel J-box available.
SensorStainless steel, explosion-proof
Approvals61-1000RK: UL61-1001RK: ULCSA NRTLC UL US
61-1000RK-05: CSA61-1001RK-05: CSA
ControllersCompatible with the following controllers: Beacon 110, Beacon 200, and Beacon 410A
WarrantyOne year materials and workmanship
Toxic Gas Transmitters Class I, Div. 2
 O2 (Oxygen)H2S (Hydrogen Sulfide)CO (Carbon Monoxide)ToxicsCO2 (Carbon Dioxide)
Sensor With J-Box65-2497RK65-2498RK65-2499RKSee Chart Below61-1007RK-02
65-2502RK61-1007RK-03
61-1007RK-05
61-1007RK-10
SensorsGalvanic cellElectrochemicalInfrared
Sensor Only65-2494RK65-2495RK65-2496RKSee Chart Below61-0198RK-02
65-2510RK61-0198RK-03
61-0198RK-05
61-0198RK-10
Measuring Range0-25% Vol.0-100 ppm0-300 ppmSee Chart Below-02: 0 - 5000 ppm
-03: 0 - 5.0% Vol.
-05: 0 - 50% Vol.
-10: 0 - 100% Vol.
Lower Detectable Limit (LDL)0.1% Vol.2% of full scale
Response Time (T-90)20 seconds or less35 seconds or less60 seconds or less30 seconds or less
Accuracy+/- 5% of full scale (0.5% volume for oxygen)
Life Expectancy2 years with normal service2 to 3 years with normal service5 years plus with normal service
Operating Environment
LocationIndoor or outdoor, Class I, Div. 2
Temperature-4°F to 122°F14°F to 104°F-40°F to 122°F
-20°C to 50°C-10°C to 40°C-40°C to 50°C
Humidity0 - 99% RH non condensing
Housing
Housing J-BoxCast aluminum, explosion-proof
SensorAluminum
ControllersCompatible with the following controllers: Beacon 110, Beacon 200, and Beacon 410A
WarrantyOne year materials and workmanship
Toxic Direct Connect Sensor Ordering Information
Part Number With J-BoxPart Number Without J-boxGasRangeResolutionSensor type
65-2301RK-NH365-2300RK-NH3Ammonia (NH3)0 - 75.0 ppm0.1 ppmESM-01
65-2303-NH3-7565-2302-NH3-75Ammonia (NH3)0 - 75.0 ppm0.1 ppmCT-7
65-2303-NH3-165-2302-NH3-1Ammonia (NH3)0 - 100 ppm1 ppmCT-7
65-2303-NH3-265-2302-NH3-2Ammonia (NH3)0 - 200 ppm1 ppmCT-7
65-2303-NH3-565-2302-NH3-5Ammonia (NH3)0 - 500 ppm1 ppmCT-7
65-2301RK-AsH365-2300RK-AsH3Arsine (AsH3)0 - 1.50 ppm0.01 ppmESM-01
65-2303-CL2-365-2302-CL2-3Chlorine (Cl2)0 - 3.00 ppm0.01 ppmCT-7
65-2303-CL2-1065-2302-CL2-10Chlorine (Cl2)0 - 10.0 ppm0.1 ppmCT-7
65-2303-CLO2-165-2302-CLO2-1Chlorine Dioxide (ClO2)0 - 1.00 ppm0.01 ppmCT-7
65-2303-CLO2-365-2302-CLO2-3Chlorine Dioxide (ClO2)0 - 3.00 ppm0.01 ppmCT-7
65-2303-CLO2-565-2302-CLO2-5Chlorine Dioxide (ClO2)0 - 5.00 ppm0.01 ppmCT-7
65-2301RK-HCN65-2300RK-HCNHydrogen Cyanide (HCN)0 - 15.0 ppm0.1 ppmESM-01
65-2301RK-PH365-2300RK-PH3Phosphine (PH3)0 - 1.00 ppm0.01 ppmESM-01
65-2301RK-SO265-2300RK-SO2Sulfur Dioxide (SO2)0 - 6.00 ppm0.01 ppmESM-01

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