S-Series Detector Head
Features
- Explosion proof housing
- Patented water repellent sensor coating
- Available for LEL, H 2 S, CO, O 2 , and ppm HC
- IR sensors available for LEL & CO2
- Long life sensors (2 + years typical)
- Competitively priced
Applications
- Petrochemical plants
- Refineries
- 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 very cost effective basic 4-20 mA transmitters for detection of common
gas hazards. The “S” series transmitters are available
for LEL, Oxygen, H2S, CO, or for 0 - 500 ppm Hydrocarbon detection (for
various fuels or solvents). The electronics are encased inside a potted
package to avoid damage from mechanical abuse or corrosion, and the amplifier
is installed inside an explosion-proof enclosure. Sensors for LEL, H2S,
CO, and ppm HC are explosion-proof with flame arrestors. The Oxygen sensor
utilizes an internal I.S. barrier, so all 5 versions are designed for
use in 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 connection of a voltmeter for calibration purposes,
and the sensor response is viewed on the voltmeter as a 100mV to 500mV
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 makes
them water repellent, and splash guards are also available for use in
very wet environments.
The transmitter operates from 24 VDC (10.5VDC to 30 VDC), and provides
a 4-20mAsignal which can be connected to a wide variety of controllers.
| Part # | LEL 65-2400RK |
O2 65-2504RK |
H2S 65-2422RK |
|---|---|---|---|
| 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 mA at 0%
LEL 20 mA at 100% LEL |
4 mA at 0 % Oxygen 20 mA at 25% Oxygen |
4 mA at 0 ppm H2S 20 mA at 100 ppm H 2 S |
| Response Time |
30 seconds
to 90% of concentration |
20 seconds
to 90% of concentration |
45 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 , Div. 1, Groups B, C, and D. |
| Temperature | -40 to 185° F | 30 to 120° F | 0 to 120° 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
normal service when intermittently exposed to flammable gas in air mixtures |
2 years normal service | 2 years normal service when intermittently exposed to H2S |
| Controls | |||
| Sensor Current | Factory set and sealed | - | |
| 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 O 2 sensor | Sets transmitter output to 4 mA with zero output from H2S sensor |
| Span | Sets transmitter
out- put to 20 mA with 100% LEL output from combustible sensor |
Sets transmitter output to 17.44 mA with 21% VOL O 2 (fresh air) output from O 2 sensor | Sets transmitter output to 20 mA with 100 ppm output from H2S sensor |
| Tools Needed | Screwdriver
and voltmeter used to make adjustments |
||
| Part # | CO 65-2432RK |
HC 65-2460RK |
|---|---|---|
| Min Operating Voltage |
11 VDC | |
| Max Operating Voltage |
30 VDC | |
| Max Current Draw |
25 mA (2 wire system) |
100 mA (power wires) 25 mA (signal wires) 3 wires |
| Signal Output | 4 mA at 0 ppm CO 20 mA at 500 ppm CO |
4 mA at 0 ppm 20 mA at 500 ppm Hexane. Linear. |
| 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. | Explosion proof for Class , Div. 1, Groups B, C, and D. |
| Temperature | 0 to 120° F | 30 to 120° F |
| Humidity | 0 - 99% RH, non condensing | 5 - 95% RH, non condensing |
| Housing | Aluminum Explosion proof enclosure | |
| Sensor | ||
| Type | Electrochemical | Metal Oxide Semiconductor |
| Life Expectancy |
2 to 3 years normal service | 5 to 10 years typical |
| Controls | ||
| Sensor Current | - | Factory set and sealed |
| Zero | Sets transmitter output to 4 mA with zero output from CO sensor | Sets transmitter output to 4 mA with zero ppm output from sensor |
| Span | Sets transmitter output to 20 mA with 500 ppm output from CO sensor | Sets transmitter output to 20 mA with 500 ppm Hexane (typical) output from sensor |
| Tools Needed | Screwdriver and voltmeter used to make adjustments | |
| 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 | |||
| Sensor Current | - | Factory set and sealed | |
| 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 | ||