Direct Connect Sensors

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Direct Connect Sensors

The RKI Direct Connect series gas sensor 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.

Controllers sold separately. 

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
For sensors not listed or any questions, please call.

Download Product Datasheet (PDF) click here

Direct Connect Sensors

Explosion Proof

LEL

General Purpose

LEL

H2 Specific

O2

Oxygen

H2S

Hydrogen Sulfide

CO

Carbon Monoxide

Sensor
With J-Box
61-1000RK61-1001RK65-2515RK65-2427RK-0565-2437RK-05
61-1000RK-05
SensorsCatalyticGalvanic cellElectrochemical
Sensor
Only
61-0140RK (UL) 61-0140RK-05 (CSA)LEL H2 - NC-6205-0165-2514RK65-2423RK-0565-2433RK-05
Measuring Range0-100% LEL0-25% Vol.0-100 ppm0-300 ppm
Lower Detectable Limit (LDL)2% of full scale0.1% Vol.2% of full scale
Response
Time (T-90)
LEL - 30 SecondsLEL H2 - 20 Seconds20 Seconds35 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 service
Operating Environment
LocationIndoor 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°C23°F to 104°F -5°C to 40°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 NRTL
61-1000RK-05 CSA
ControllersCompatible with the following controllers: Beacon 110, Beacon 200, and Beacon 410
WarrantyOne year materials and workmanship

 

Explosion Proof IR

CH4
Methane

HC
Hydrocarbons

CO2
Carbon Dioxide

Sensor
With J-Box
61-1003RK-CH461-1003RK-HC61-1004RK-02
61-1004RK-03
61-1004RK-05
61-1004RK-10
SensorsInfrared
Sensor
Only
61-0190RK-CH461-0190RK-HC61-0191RK-02
61-0191RK-03
61-0191RK-05
61-0191RK-10
Measuring Range0-100% LEL0-100% 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 Seconds30 Seconds30 Seconds
Accuracy+/- 5% of full scale (0.5% volume for oxygen)
Life Expectancy5 years plus with normal service
Operating Environment
LocationIndoor or outdoor. Explosion proof for Class I, Groups B, C, and D atmospheres.
Temperature-4°F to 122°F -20°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
ApprovalsC UL US
ControllersCompatible with the following controllers: Beacon 110, Beacon 200, and Beacon 410
WarrantyOne year materials and workmanship

Direct Connect Sensors

Direct Interface with Beacon 110 / 200 / 410

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.

Direct Connect Sensors

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