S2 Series Diffusion Sensor

  • Available gases include
    LEL, H2S, CO, PPM H2, and CO2
    Toxic gases include NH3, SO2, HCN, and more
  • Infrared sensor for combustibles and CO2
  • Hydrogen-Specific now available
  • Patented water repellent sensor coating
  • 4-20 mA output
  • Explosion proof construction
  • Optional stainless steel junction box

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    • Description
    • Features
    • Applications
    • Specifications
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    The RKI S2 series gas sensor/transmitters are highly reliable and very cost effective for the detection of common gas hazards. The S2 series are available for LEL, H2 Specific (LEL, and ppm), Oxygen, H2S, CO, and for a variety of toxic gases. The transmitters for LEL, H2 Specific, Oxygen, H2S, CO2, and Carbon Monoxide are explosion-proof with flame arrestors, and approved for use in hazardous areas (Class l, Groups B, C, D). An optional non-explosion proof version is available for oxygen, H2S, CO, and CO2 in non-hazardous atmospheres. LEL sensors are available using catalytic bead and infrared technologies.

    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 available for NH3, SO2, PH3, AsH3, and HCN.

    The S2 transmitters can be used either indoors or outdoors. The flame arrestors for the explosion-proof versions utilize a patented coating which make them water repellent. Splash guards are also available for use in very wet environments. An optional stainless steel junction box is available for corrosive environments.

    All of the S2 transmitters are designed to interface with RKI controllers, or with PLC/DCS systems.

    • Available gases include
      LEL, H2S, CO, PPM H2, and CO2
      Toxic gases include NH3, SO2, HCN, and more
    • Infrared sensor for combustibles and CO2
    • Hydrogen-Specific now available
    • Patented water repellent sensor coating
    • 4-20 mA output
    • 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
    • Chemical storage buildings

    Explosion Proof Specifications

    LEL

    General Purpose

    LEL

    H2 Specific

    H2 PPM

    Hydrogen

    O2

    Oxygen

    H2S

    Hydrogen Sulfide

    CO

    Carbon Monoxide

    CH4

    Methane

    HC

    Hydrocarbons

    CO2

    Carbon Dioxide

    Part #

    65-2405RK

    65-2451RK

    65-2442RK-1000

    65-2322RK

    65-2331RK

    65-2336RK

    65-2394RK-CH4

    65-2394RK-HC

    65-2396RK-02

    65-2396RK-03

    65-2396RK-05

    65-2396RK-10

    65-2405RK-05

    65-2451RK-05

    65-2442RK-2000

    Sensor

    Catalytic

    Metal oxide
    semiconductor

    Galvanic cell

    Electrochemical

    Infrared

    Measuring Range

    0-100% LEL

    0-100% LEL

    (H2 Specific)

    0-1000 ppm

    0-25% Vol.

    0-100 ppm

    0-300 ppm

    0-100% LEL

    0 - 5000 ppm

    0 - 5% Vol.

    0 - 50% Vol.

    0 - 100% Vol.

    0-2000 ppm

    Lower Detectable Limit (LDL)

    2% of full scale

    0.1% Vol.

    2% of full scale

    Accuracy
    (whichever is greater)

    ± 5% of
    reading or
    ± 2% LEL

    ± 10% of
    reading or
    ± 5% of full scale

    ± 0.5% O2

    ± 5% of
    reading
    ± 2 ppm H2S

    ± 5% of
    reading
    ± 5 ppm CO

    ± 5% of
    reading or
    ± 2% of full scale

    Response Time (T-90)

    30 Seconds

    20 Seconds

    45 Seconds

    90 Seconds

    60 Seconds

    90 Seconds

    30 Seconds

    Max Current Draw (24VDC)

    70 mA (power wires) 25 mA (signal wires) 3 wires

    25 mA max, 2 wires

    60 mA (power wires)

    25 mA (signal wires) 3 wires

    Life
    Expectancy

    2 to 3 years with normal exposure to flammable gas

    3-5 years with normal service

    5 years plus with normal service

    2-3 years with normal service

    5 years plus with normal service

    Operating Environment

    Location

    Indoor or outdoor. Explosion proof for Class I, Div. 1, Groups B, C, and D.

    Temperature

    -40°F to 167°F

    -40°C to 75°C

    -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

    Controls

    Zero

    Sets transmitter output to 4 mA with zero output from sensor

    Span

    Sets transmitter output to proper level when span gas is applied

    Output

    4 – 20 mA signal

    Operating Voltage

    11 VDC to 30 VDC

    19 VDC to 30 VDC

    19-30VDC (250 OHMS

    impedance max)

    11 VDC to 30 VDC

    Approvals

    65-2405RK

    UL

    65-2451RK

    UL

    UL

    CSA NRTL

    C UL US

    65-2405RK-05
    CSA

    65-2451RK-05
    CSA

    Controllers

    Compatible with the following controllers: Beacon 110, Beacon 200, Beacon 410A, and 800, also PLC and DCS systems

    Warranty

    One year materials and workmanship

    Non Explosion Proof

    O2

    Oxygen

    H2S

    Hydrogen Sulfide

    CO

    Carbon Monoxide

    Toxics

    See chart below

    CO2

    Carbon Dioxide

    Part #

    65-2320RK

    65-2330RK

    65-2335RK

    See chart
    below

    65-2397RK-02

    65-2397RK-03

    65-2397RK-05

    65-2397RK-10

    Sensor

    Galvanic cell

    Electrochemical

    Infrared

    Measuring Range

    0-25% Vol.

    0-100 ppm

    0-300 ppm

    See chart
    below

    0 - 5000 ppm

    0 - 5% Vol.

    0 - 50% Vol.

    0 - 100% Vol.

    Lower Detectable Limit (LDL)

    0.1% Vol.

    2% of full scale

    Accuracy

    (whichever is greater)

    ± 0.5% O2

    ± 5% of
    reading
    ± 2 ppm H2S

    ± 5% of
    reading
    ± 5 ppm CO

    ± 10% of
    reading or
    ± 5% of full scale

    ± 5% of
    reading or
    ± 2% of full scale

    Response Time (T-90)

    20 Seconds

    45 Seconds

    30 Seconds

    60 Seconds

    30 Seconds

    Max Current Draw (24VDC)

    25 mA max, 2 wires

    60 mA (power wires)

    25 mA (signal wires) 3 wires

    Life Expectancy

    2 years normal
    service

    2 to 3 years with normal service

    5 years plus with
    normal service

    Operating Environment

    Location

    Indoor 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

    5-95% RH

    0 – 99% RH
    non condensing

    Housing

    Housing J-Box

    Cast aluminum, explosion-proof

    Sensor

    Plastic or aluminum

    Controls

    Zero

    Sets transmitter output to 4 mA with zero output from sensor

    Span

    Sets transmitter output to 20 mA with full scale output from sensor

    Operating Voltage

    19 VDC to 30 VDC

    Output

    4-20 mA signal

    Controllers

    Compatible with the following controllers: Beacon 110, Beacon 200, Beacon 410A, and 800, also PLC and DCS systems

    Warranty

    One year materials and workmanship

    S2 toxic sensor

    S2 toxic sensor

    Non Explosion Proof Toxic Assemblies

    Part Number With J-Box

    Gas

    Range

    Resolution

    Sensor Type

    65-2340RK-NH3

    Ammonia (NH3)

    0 - 75.0 ppm

    0.1 ppm

    ESM -01

    65-2340RK-AsH3

    Arsine (AsH3)

    0 - 1.50 ppm

    0.01 ppm

    ESM -01

    65-2341-CL2

    Chlorine (Cl2)

    0 - 3.00 ppm

    0.01 ppm

    CT-7

    65-2341-CL2-10

    Chlorine (Cl2)

    0 - 10.0 ppm

    0.1 ppm

    CT-7

    65-2341-CLO2

    Chlorine Dioxide (ClO2)

    0 - 1.00 ppm

    0.01 ppm

    CT-7

    65-2340RK-HCN

    Hydrogen Cyanide (HCN)

    0 - 15.0 ppm

    0.1 ppm

    ESM -01

    65-2340RK-PH3

    Phosphine (PH3)

    0 - 1.00 ppm

    0.01 ppm

    ESM -01

    65-2340RK-SO2

    Sulfur Dioxide (SO2)

    0 - 6.00 ppm

    0.01 ppm

    ESM -01

    * Partial pressure sensor for helium (He) applications. Consult factory for details.

    Direct Interface with Beacon 110 / 200 / 410 / 800 Controllers

    S2 Wiring Matrix

    S2 Transmitter
    Number of Wires to Controller
    Maximum Distance to Controller
    Beacon 410 Configuration============
    18 AWG wire
    16 AWG wire
    14 AWG wire
    LEL / IR / CO2
    3
    2500 ft.
    5,000 ft.
    8,000 ft.
    Oxygen
    2
    2500 ft.
    5,000 ft.
    8,000 ft.
    H2S
    2
    2500 ft.
    5,000 ft.
    8,000 ft.
    CO
    2
    2500 ft.
    5,000 ft.
    8,000 ft.
    Toxics
    2
    2500 ft.
    5,000 ft.
    8,000 ft.

    Specifications subject to change without notice.
    Made in the USA

    Download Datasheet

    Driven By Values, Delivering On A Vision.