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Direct Connect

LEL / H2 / O2 / CO / H2S Gas Sensors

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Direct Connect 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.

Features

  • 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

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
  • Explosion Proof Specifications
  • Non-Explosion Proof Specifications
Infrared CO2 CH4 HC versions are also available (see below)

Explosion Proof

LEL

General Purpose

LEL

H2 Specific

O2

Oxygen

H2S

Hydrogen Sulfide

CO

Carbon Monoxide

Sensor
With J-Box
61-1000RK 61-1001RK 65-2515RK 65-2427RK-05 65-2437RK-05
61-1000RK-05
Sensors Catalytic Galvanic cell Electrochemical
Sensor
Only
61-0140RK (UL) 61-0140RK-05 (CSA) LEL H2 - NC-6205-01 65-2514RK 65-2423RK-05 65-2433RK-05
Measuring Range 0-100% LEL 0-25% Vol. 0-100 ppm 0-300 ppm
Lower Detectable Limit (LDL) 2% of full scale 0.1% Vol. 2% of full scale
Response
Time (T-90)
LEL - 30 Seconds LEL H2 - 20 Seconds 20 Seconds 35 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
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
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
61-1000RK-05 CSA
Controllers Compatible with the following controllers: Beacon 110, Beacon 200, and Beacon 410
Warranty One year materials and workmanship

 

Explosion Proof IR

CH4
Methane

HC
Hydrocarbons

CO2
Carbon Dioxide

Sensor
With J-Box
61-1003RK-CH4 61-1003RK-HC 61-1004RK-02
61-1004RK-03
61-1004RK-05
61-1004RK-10
Sensors Infrared
Sensor
Only
61-0190RK-CH4 61-0190RK-HC 61-0191RK-02
61-0191RK-03
61-0191RK-05
61-0191RK-10
Measuring Range 0-100% LEL 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
Response
Time (T-90)
30 Seconds 30 Seconds 30 Seconds
Accuracy +/- 5% of full scale (0.5% volume for oxygen)
Life Expectancy 5 years plus with normal service
Operating Environment
Location Indoor or outdoor. Explosion proof for Class I, Groups B, C, and D atmospheres.
Temperature -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
Approvals C UL US
Controllers Compatible with the following controllers: Beacon 110, Beacon 200, and Beacon 410
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 *65-2 502RK 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
*65-2510RK
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
normal service
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 -4°F to 122°F -20°C to 50°C
Humidity 0 - 99% RH non condensing
Housing
Housing J-Box Cast aluminum, explosion-proof
Sensor Stainless steel, explosion-proof
Controllers Compatible with the following controllers: Beacon 110, Beacon 200, and Beacon 410
Warranty One year materials and workmanship

 

S2 toxic sensor

Non Explosion Proof Toxic Assemblies

Ordering Information

Part Number
With J-Box
Part Number
Without J-Box
Gas Range
65-2301RK-AsH3 65-2300RK-AsH3 Arsine (AsH3) 0 - 1.5 ppm
65-2301RK-NH3 65-2300RK-NH3 Ammonia (NH3) 0 - 75.0 ppm
65-2301RK-HCN 65-2300RK-HCN Hydrogen Cyanide (HCN) 0 - 15 ppm
65-2301RK-PH3 65-2300RK-PH3 Phosphine (PH3) 0 - 1.00 ppm
65-2301RK-SO2 65-2300RK-SO2 Sulfur Dioxide (SO2) 0 - 6.00 ppm

 

Direct Interface with Beacon 110 / 200 / 410

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