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S2 Series – Gas Sensor/Transmitter by RKI Instruments
RKI Instruments S2 series sensor transmitter
RKI Instruments S2 series sensor transmitter housing option
RKI Instruments S2 series sensor transmitter housing option
S2 Series – Gas Sensor/Transmitter by RKI Instruments
RKI Instruments S2 series sensor transmitter
RKI Instruments S2 series sensor transmitter housing option
RKI Instruments S2 series sensor transmitter housing option

S2 Series – Gas Sensor/Transmitter by RKI Instruments

Vendor:RKI Instruments

Type: Transmitter

SKU: 65-2394RK-CH4

$2,095.50 USD
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RKI Instruments S2 series diffusion gas sensor/transmitters for fixed systems: highly reliable, very cost-effective detection of common gas hazards, with 4-20 mA output.

Gas options: Methane (CH4), LEL - H2 Specific, Hydrogen Sulfide (H2S), Hydrocarbons (HC), H2 (0-1000 ppm), H2 (0-2000 ppm), LEL, Oxygen (O2), Carbon Monoxide (CO), CO2 (0-100% Vol.), CO2 (0-5.0% Vol.), CO2 (0-50% Vol.), CO2 (0-5000 ppm).

Key benefits

  • Available for LEL, H2-specific (LEL and ppm), oxygen, H2S, CO, CO2 and a variety of toxic gases; LEL by catalytic bead or infrared
  • LEL, H2-specific, oxygen, H2S, CO2 and CO transmitters are explosion-proof with flame arrestors, approved for Class I, Div. 1, Groups B, C, D; optional non-explosion-proof version for oxygen, H2S, CO and CO2 (Class 1, Div. 2)
  • Toxic sensors (NH3, AsH3, Cl2, ClO2, HCN, PH3, SO2) are electrochemical plug-in types with high specificity, fast response and long life; tool-free field replacement; for Class I, Div. 2
  • Indoor or outdoor use; patented water-repellent flame arrestor coating; splash guards for very wet environments
  • Optional stainless steel junction box for corrosive environments
  • Interfaces with RKI controllers or PLC/DCS systems
  • Made in the USA

Specifications

LEL
General Purpose		 LEL
H2 Specific		 H2 PPM
Hydrogen		 O2
Oxygen		 H2S
Hydrogen Sulfide		 CO
Carbon Monoxide		 CH4
Methane IR		 HC
Hydrocarbons IR		 CO2
Carbon Dioxide IR
Part # 65-2405RK 65-2451RK 65-2443-500 65-2443-1000 65-2443-2000 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
Sensor Catalytic Metal oxide
semiconductor 		Galvanic cell Electrochemical Infrared
Measuring Range 0-100% LEL 0-100% LEL (H2 Specific) 0-500 ppm 0-1000 ppm 0-2000 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.
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 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 -4°F to 104°F -20°C to 40°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 65-2443-500
65-2443-1000
65-2443-2000 UL 		CSA NRTL C UL US
65-2405RK-05
CSA 		65-2451RK-05
CSA 		65-2443-500-05
65-2443-1000-05
65-2443-2000-05 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
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 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
65-2341-NH3-75 Ammonia (NH3) 0 – 75.0 ppm 0.1 ppm CT-7
65-2341-NH3-1 Ammonia (NH3) 0 – 100 ppm 1 ppm CT-7
65-2341-NH3-2 Ammonia (NH3) 0 – 200 ppm 1 ppm CT-7
65-2341-NH3-5 Ammonia (NH3) 0 – 500 ppm 1 ppm CT-7
65-2340RK-AsH3 Arsine (AsH3) 0 – 1.50 ppm 0.01 ppm ESM -01
65-2341-CL2-3 Chlorine (Cl2) 0 – 3.00 ppm 0.01 ppm CT-7
65-2341-CL2-05 Chlorine (Cl2) 0 – 5.00 ppm 0.02 ppm CT-7
65-2341-CL2-10 Chlorine (Cl2) 0 – 10.0 ppm 0.1 ppm CT-7
65-2341-CLO2-1 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

S2 Wiring Matrix

S2 Transmitter Number of Wires to Controller Maximum Distance to Controller
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.

Product information supplied by the manufacturer (RKI Instruments).

Product codes

  • Methane (CH4) — SKU: 65-2394RK-CH4
  • LEL - H2 Specific — SKU: 65-2451RK
  • Hydrogen Sulfide (H2S) — SKU: 65-2331RK
  • Hydrocarbons (HC) — SKU: 65-2394RK-HC
  • H2 (0-1000 ppm) — SKU: 65-2442RK-1000
  • H2 (0-2000 ppm) — SKU: 65-2442RK-2000
  • LEL — SKU: 65-2405RK
  • Oxygen (O2) — SKU: 65-2322RK
  • Carbon Monoxide (CO) — SKU: 65-2336RK
  • CO2 (0-100% Vol.) — SKU: 65-2396RK-10
  • CO2 (0-5.0% Vol.) — SKU: 65-2396RK-03
  • CO2 (0-50% Vol.) — SKU: 65-2396RK-05
  • CO2 (0-5000 ppm) — SKU: 65-2396RK-02

Documents

Style: Methane (CH4)
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S2 Series – Gas Sensor/Transmitter by RKI Instruments

S2 Series – Gas Sensor/Transmitter by RKI Instruments

$2,095.50 USD

Quick order list

Methane (CH4)65-2394RK-CH4
$2,095.50 USD/ea
$0.00
LEL - H2 Specific65-2451RK
$1,453.15 USD/ea
$0.00
Hydrogen Sulfide (H2S)65-2331RK
$1,474.20 USD/ea
$0.00
Hydrocarbons (HC)65-2394RK-HC
$2,095.50 USD/ea
$0.00
H2 (0-1000 ppm)65-2442RK-1000
$1,674.30 USD/ea
$0.00
H2 (0-2000 ppm)65-2442RK-2000
$1,674.30 USD/ea
$0.00
LEL65-2405RK
$1,210.95 USD/ea
$0.00
Oxygen (O2)65-2322RK
$1,368.90 USD/ea
$0.00
Carbon Monoxide (CO)65-2336RK
$1,474.20 USD/ea
$0.00
CO2 (0-100% Vol.)65-2396RK-10
$2,095.50 USD/ea
$0.00
CO2 (0-5.0% Vol.)65-2396RK-03
$2,095.50 USD/ea
$0.00
CO2 (0-50% Vol.)65-2396RK-05
$2,095.50 USD/ea
$0.00
CO2 (0-5000 ppm)65-2396RK-02
$2,095.50 USD/ea
$0.00
0

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