by Fmeaddons

S2 Series

S2 Series Diffusion Sensor/Transmitter

Features

  • 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
Contact RKI Sales

Description

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.

Application

  • 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

Specifications

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

Click Here For Download pdf File

DatasheetLEL ManualH2 Specific Manual