HARSH ENVIRONMENT SAMPLING SYSTEM
Single / Dual Sensor Air Aspirator
Gas Detection For Life
World Leader In Gas Detection & Sensor Technology
www.rkiinstruments.com
RKI Instruments, Inc. • 33248 Central Ave. Union City, CA 94587 • Phone (800) 754-5165 • (510) 441-5656 • Fax (510) 441-5650
Single or dual sensor system is designed to monitor gas atmospheres from extreme conditions with either temperature
or pressure challenges. A powerful air aspirator can pull a sample from up to 100 feet away. The filtered and conditioned
sample gas is then passed across one or two different detectors. Each detector shares a common calibration and
compressed air inlet for aspirated flow. This system is fault tolerant removing the need for expensive downtimes and
maintenance. The sample is diluted with air after gas sensor then returned to a common exhaust reducing the danger
of potential hazardous gases entering a safe work space.
System integrity is maintained at all times using a flow fail monitoring device which provides an NO contact that
activates if the sample line becomes blocked or damaged or if the air supply is removed or interrupted.
The panel can be used with direct-connect (sensors connected to an RKI controller), or with S, S2 Series, and M2A
Series transmitters. All transmitters have a 4-20 mA signal for direct connection to the site DCS, PLC or site control
system. If needed, RKI instruments can supply a dedicated Gas Detection Control system to provide local alarms, 4-20
mA output with a wide range of dry contacts, making the system very sophisticated and user friendly.
Integral sample filter included to remove water and dirt, automatic drain type.
RS485 Modbus output options available on the M2A transmitter.
F000-0901
Single or Dual Versions Available
Features
• Simple to operate
• Long life air aspirator (no moving parts)
• Extreme sample temperatures
• One or two sensors
• Inside/outside location options
• Corrosion resistant construction for extreme
environments / samples
• Uses proven RKI technology
• Modular design easy to maintain
• Self draining moisture trap
• Back flush for sample line
• NEMA 4X enclosure options (stainless steel or GRP)
Industry Applications
• Flammable, oxygen, or toxic monitoring
• Wastewater
• Drinking water plants
• Gas turbine monitoring flammable and CO
• Tunnel monitoring
• Landfill borehole analyses
• Printing press exhaust solvent recovery
• Winery CO2 / O2
• Biogas Methane
• Hydrogen Sulfide “H2S” scrubber break through
Dual Point Sensor Air Aspirator
Toll Free: (800) 754-5165 • Phone: (510) 441-5656
Fax: (510) 441-5650 • www.rkiinstruments.com
Authorized Distributor:
Specifications subject to change without notice.
Made in the USA
Gas sensors One or two
Gas sensor options
H2 CH4, HC’s 0-100%LEL, CO, CO2, H2S, and O2, other
gases available contact RKI instruments
Sensor type Catalytic, Electrochemical, IR
Maximum sample line length
100’ (1/4” OD. tube)
Compressed air requirements 10 to 140 PSI compressed air or N2
Mounting panel Stainless Steel 21” x 21”
Operating temperature See detector head specification
System enclosure (optional) GRP or Stainless Steel. IP65 NEMA 4
Sample flow across the detector head 3 SCFH (1.5 LPM)
Compressed air usage
Typical 6 SCFH (3 LPM)
Approvals Sensors classified for Class I, group B, C , D
Display
M2A Transmitter local display
Outputs Low flow contact, normally open (NO)
Purge / Calibration
Manual operated spring return valves for calibration and back
purge of the filter / sample line.
Filtration
In line coalescing filter, automatic drain, 1 micron
particulate, with transparent bowl
Warranty 1 Year
• Weatherproof enclosure for outside locations rainproof or as required for site secure
installations.
