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Home | Fixed Systems | S-Series
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Diffusion Sensor/Transmitter S-Series

"S" Series Transmitter (9K jpg)
Features
  • Explosion proof housing
  • Patented water repellent sensor coating
  • Available for LEL, H2S, CO, O2 , and ppm HC
  • IR sensors available for LEL & CO2
  • Long life sensors (2 + years typical)
  • Competitively priced
  • UL or CSA approved

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
  • Chemical storage buildings

The RKI S series gas sensor/transmitters are highly reliable and cost effective basic 4-20 mA transmitters for the detection of common gas hazards. The S series transmitters are available for LEL (catalytic), LEL (IR) CH4, LEL (IR) HC, O2, H2S, CO, or CO2 (IR). The electronics are encased inside a potted package to avoid damage from mechanical abuse or corrosion, and this assembly is installed inside an explosion-proof enclosure. All sensors are explosion-proof with flame arrestors and approved for use in hazardous atmospheres. There is also an optional version for oxygen for use in non-hazardous atmospheres.

The only tools required to calibrate the S series are a voltmeter, screwdriver, and cal gas. The zero and calibration functions are performed by adjusting potentiometers on the amplifiers. The amplifier has test jacks for connecting to a voltmeter for calibration purposes, and the sensor response is viewed on the voltmeter as a 100 mV to 500 mV signal. Field calibration can be performed easily and quickly by one person.

The S series transmitters can be used either indoors or outdoors. The flame arrestors utilize a patented coating which make them water repellent, and splash guards are also available for use in very wet environments.

The transmitter operates from 24 VDC (11VDC to 30 VDC), and provides a 4-20mA signal which can be connected to a wide variety of controllers.



Part # LEL
65-2400RK
65-2400RK-05
O2
65-2513RK
65-2516RK
65-2504RK*
H2S
65-2422RK-05
CO
65-2432RK-05
Min Operating
Voltage
11 VDC
Max Operating
Voltage
30 VDC
Max Current
Draw
200 mA
(power wires)
25 mA (signal wires)
3 or 4 wires
25 mA
(2 wire system)
Signal Output 4 - 20 mA signal
Response
Time
30 seconds to 90%
of concentration
20 seconds to 90%
of concentration
45 seconds to 90% of concentration 30 seconds to 90% of concentration
Operating Environment
Location Indoor or outdoor.
Explosion proof for
Class , Div. 1,
Groups B, C, and D.
Indoor or outdoor.
Explosion proof
housing and
intrinsically safe sensor.
Indoor or outdoor. Explosion proof for Class I, Div. 1,
Groups B, C, and D.
Temperature -40 to 185° F -4 to 113° F
Humidity 0 - 99% RH,
non condensing
Housing Aluminum Explosion
proof enclosure
Sensor
Type Catalytic
Combustion
Galvanic Cell Electrochemical
Life Expectancy 1 to 2 years with normal
intermmittent exposure to
flammable gas
2 years normal service 2 years normal service when intermittently exposed to H2S 2 to 3 years
normal service
Controls
Zero Sets transmitter output to 4 mA with 0% LEL output from combustible sensor Sets transmitter output to 4 mA with an inert gas (zero)
output from
O2 sensor
Sets transmitter output to 4 mA with zero output from H2S
sensor
Sets transmitter output to 4 mA with zero output from CO sensor
Span Sets transmitter output to 20 mA with 100% LEL output from combustible sensor Sets transmitter output to 17.44 mA with 20.9% Vol. O2 (fresh air) output from O2 sensor Sets transmitter output to 20 mA with 100 ppm output from H2S sensor Sets transmitter output to 20 mA with 300 ppm output from CO sensor



Part # CO2
65-2391RK-03
CH4
65-2390RK-CH4
HC
65-2390RK-HC
Measuring Range 0-5% Vol. 0-100% LEL
Max Current
Draw
60 mA (power wires)
25 mA (signal wires) 3 wires
Signal Output 4 - 20 mA signal
Response
Time
30 seconds to 90% of concentration
Operating Environment
Location Indoor or outdoor. Explosion proof for Class I, Div. 1,
Groups B, C, and D.
Temperature -4 to 122° F
Humidity 0 - 99% RH, non condensing
Housing Aluminum Explosion proof enclosure
Sensor
Type Infrared
Life Expectancy
5+ years normal service
Controls
Zero Sets transmitter output to 4 mA with zero output from CO2 sensor Sets transmitter output to 4 mA with 0% LEL output from
combustible sensor
Span Sets transmitter output to 20 mA with 5% volume output from CO2 sensor Sets transmitter output to 20 mA with 100% LEL output from
combustible sensor
Operating Voltage
11 VDC to 30 VDC
Approvals
C CSA US
Warranty
One year materials and workmanship


* Specifications subject to change without notice
Made in the USA

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