S2 Series Diffusion Sensor / Transmitter

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Item #: RKI-65
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S2 Series Diffusion Sensor / Transmitter

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 I, 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 J-Box (junction box) is needed for remote runs away from the controller.

The S2 transmitters can be used either indoors or outdoors. The flame arrestors for the explosion-proof versions utilized 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.

Features:

  • Available gases include: LEL, H2S, CO, PPM, H2 and CO2
  • 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
Applications:
  • Petrochemical plants
  • Refineries
  • Gas Plants
  • Offshore Drilling Platforms
  • Water and wastewater treatment plants
  • Pulp & paper mills
  • Gas, telephone & electric utilities
  • Parking garages
  • Manufacturing facilities
  • Steel 
  • Automotive
  • Chemical storage buildings 

Download Product Datasheet (PDF) click here

S2 Series Diffusion Sensor / Transmitter

Explosion Proof

LEL 
General Purpose

LEL 
H2 Specific

O2 
Oxygen

H2S Hydrogen Sulfide

CO Carbon Monoxide

Part #65-2405RK65-2451RK65-2322RK65-2331RK65-2336RK
65-2405RK-0565-2451RK-05
SensorCatalyticGalvanic cellElectrochemical
Measuring Range0-100% LEL0-100% LEL (H2 Specific)0-25% Vol.0-100 ppm0-300 ppm
Lower Detectable Limit (LDL)2% of full scale0.1% Vol.2% of full scale
Max Current Draw (24VDC)200 mA (power wires) 25 mA (signal wires)
3 wires
20 mA max, 2 wires
Response Time (T-90)30 Seconds20 Seconds20 Seconds45 Seconds30 Seconds
Accuracy+/- 5% of full scale (0.5% volume for oxygen)
Life
Expectancy
2 to 3 years with normal exposure to flammable gas3-5 years with normal service2-3 years with normal service

Operating Environment

LocationIndoor 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-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

Controls

ZeroSets transmitter output to 4 mA with zero output from sensor
SpanSets transmitter output to proper level when span gas is applied
Output4 - 20 mA signal
Operating Voltage11 VDC to 30 VDC19-30VDC (250 OHMS impedance max)
Approvals65-2405RK UL65-2451RK ULCSA NRTL
65-2405RK-05
C CSA US
65-2451RK-05
C CSA US
ControllersCompatible with the following controllers: Beacon 110, Beacon 200, Beacon 410, and 800, also PLC and DCS systems
WarrantyOne year materials and workmanship
 

Explosion Proof

MOS

IR

H2 PPM
Hydrogen

CO2 
Carbon Dioxide

CH4 
Methane

HC 
Hydrocarbons

Part #65-2442RK-1000
65-2442RK-2000
65-2396RK-02 
65-2396RK-03 
65-2396RK-05 
65-2396RK-10
65-2394RK-CH465-2394RK-HC
SensorMetal oxide
semiconductor
Infrared
Measuring Range0-1000 ppm
0-2000 ppm
0 - 5000 ppm 
0 - 5% Vol. 
0 - 50% Vol. 
0 - 100% Vol.
0-100% LEL
Lower Detectable Limit (LDL)2% of full scale
Max Current Draw (24VDC)200 mA (power wires) 25 mA (signal wires) 3 wires60 mA (power wires) 25 mA (signal wires) 3 wires
Response Time
(T-90)
45 Seconds30 Seconds
Accuracy± 10% of
reading or
± 5% of full scale
± 5% of reading or
± 2% of full scale
Life
Expectancy
5 years plus with normal service5 years plus with normal service

Operating Environment

LocationIndoor 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
-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

Controls

ZeroSets transmitter output to 4 mA with zero output from sensor
SpanSets transmitter output to proper level when span gas is applied
Output4 - 20 mA signal
Operating Voltage19 VDC to 30 VDC11 VDC to 30 VDC
ApprovalsULC UL US
ControllersCompatible with the following controllers: Beacon 110, Beacon 200, Beacon 410, and 800, also PLC and DCS systems
WarrantyOne year materials and workmanship

S2 Series Diffusion Sensor / Transmitter

There are no reviews yet.