Direct Connect
LEL / H2 / O2 / CO / H2S Gas Sensors

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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
With J-Box

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
Only

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
Time (T-90)

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
*65-2510RK

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

-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

S2 toxic sensor

Toxic Transmitter 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
65-2301RK-AsH365-2300RK-AsH3Arsine (AsH3)0 – 1.50 ppm0.01 ppmESM -01
65-2303-CL265-2302-CL2Chlorine (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-CLO265-2302-CLO2Chlorine Dioxide (ClO2)0 – 1.00 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

 

Direct Connect Wiring Matrix

SensorNumber of Wires to ControllerMaximum Distance to Controller
18 AWG wire min.
LEL / CO24500 ft.
Oxygen2500 ft.
H2S2500 ft.
CO2500 ft.
Toxics2500 ft.

Specifications subject to change without notice.
Made in the USA

Direct Connect Literature

Product DatasheetOperating Manuals
Direct Connect Datasheet
Direct Connect Product Datasheet
Direct Connect Manual
Oxygen Detector Operator’s Manual

Manuals for other gases

 

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