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RKI Instruments Gas Tracer Confined Space/Leak Detector, 2 Sensor, PPM CH4 / CO Base, Alkaline Battery Pack Only - 72-0291-55-A

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RKI Instruments Gas Tracer Confined Space/Leak Detector, 2 Sensor, PPM CH4 / CO Base, Alkaline Battery Pack Only - 72-0291-55-A

RKI Instruments Gas Tracer Confined Space/Leak Detector, 2 Sensor, PPM CH4 / CO Base, Alkaline Battery Pack Only - 72-0291-55-A


72-0291-56-A Gas Tracer Confined Space/Leak Detector, 2 Sensor, PPM CH4/CO Base, Alkaline Battery Pack Only by RKI Instruments

Built around high-quality micro-sensortechnology, the GasTraceris RKI's smallest personal 5 sensor monitor with a built in sample pump. Weighing only 12.3 ounces, it has many features which set the Gas Tracer apart from the competition. For example, it can monitor the standard gas safety hazards for gas/pipeline operations, (LEL combustibles, Oxygen content, and Carbon Monoxide), and it also has a high-sensitivity ppm CH4 leak tracker mode which reads down to 10 ppm. It can also measure 100% volume Methane and dynamically display either % LEL, or % volume with its auto-ranging ability. The Gas Tracer is excellent for gas line purge testing and detection of small gas leaks.

The Gas Tracer's large LCD display shows all gas readings, battery level, current time, and will automatically backlight in alarm conditions. Other standard mode alarm types include vibration, visual, and audible alarms that can be set to latching or non-latching. Controlled by a microprocessor, the Gas Tracer continuously checks itself for sensor connections, low battery, circuit trouble, low flow, and calibration errors. The Gas Tracer can operate on either a Li-Ion battery pack or an alkaline battery pack. The batteries are simple to replace requiring no tools to access the removable battery compartment or pack. Calibration and bump test intervals and reminders are user adjustable and can be set to either go into alarm or to lock the user out of normal measurement mode once a calibration period has expired. Calibrations can be performed automatically or individually in single calibration mode. The Gas Tracer is also compatible with the economical SDM-2012 single channel calibration station.


  • Monitors ppm, LEL, and % volume methane, O2 and CO
  • ppm leak detector, detects down to 10 ppm CH
  • "Leak tracker" audible/visual alarm mode for CH4 and CO
  • 0 to 100% volume Methane option
  • Auto-ranging display of % LEL and % volume
  • Barhole test mode
  • Bump test reminder option
  • Snap-logging - on demand data recording
  • Pump pause on demand extends battery life
  • Status indicators: Pump active, microprocessor status and battery level
  • Internal sample drawing pump with up to 50 foot range
  • Vibration, visual, and audible alarms
  • Automatic backlight during alarms
  • Calibration reminder with lock out option
  • Lithium ion or alkaline battery packs (interchangeable)
  • Quick charge
  • Glove friendly large buttons
  • Alarm latching or non-latching
  • High impact protective rubber overmolding
  • Up to 600 hours of datalogging with alarm trends
  • Autocalibration or single calibration
  • TWAand STEL readings with lunch-break mode
  • Intrinsically safe,ATEX/IECEx/CE and c CSAus (pending)
  • High dust and water resistance design
  • 2 year warranty

*Please note we can only ship RKI products to customers within the United States

Gas Detected
Combustible Gases 
(Methane as standard)
% Volume Methane
PPM Methane
Oxygen (O2)
Carbon Monoxide (CO)
Detection Principle
Catalytic combustion
Thermal conductivity
Galvanic cell
Electro- chemical cell
Detection Range
0 ~ 100% LEL
0 ~ 100% Vol.
0 ~ 5000 ppm optional 10,000 ppm range version available
0 ~ 40% Vol.
0 ~ 500 ppm
Accuracy Statement 
(whichever is greater)
± 5% of reading or
± 2% LEL
± 5% of reading or ± 2% of full scale
± 10% of reading or ± 50 ppm CH4
± 0.5% O2
± 5% of reading or ± 5 ppm CO
Sampling Method
Internal sample pump, flow rate nominal 0.5 LPM, includes hydrophobic filter
Digital LCD with 7 segments, auto backlight during alarm
Preset Alarms
(User Adjustable)
1st alarm 10% LEL
2nd alarm 50% LEL
Over alarm 100% LEL
No alarms for
% Vol. CH4
Increasing tone/light pulse as concentration increases
Low alarm 19.5% High alarm 23.5% Over alarm 40.0%
1st 25 ppm
2nd 50 ppm
TWA 25 ppm
STEL 200 ppm
Over 500 ppm
Alarms Types
Leak Tracker Mode: Escalating audible/visual alarm, changes with gas level (audible can be turned off)
Gas alarms: 1st and 2nd, STEL, TWA (user adjustable) and OVER
Trouble alarms: Sensor connection, low battery, low flow, circuit trouble and calibration error
Alarm Methods
Gas alarms: Flashing lights, two tone buzzer, and vibration
Trouble alarms: Flashing lights, trouble displayed, intermittent buzzer, and vibration
Operating Temp. & Humidity
-20°C to +50°C (-4°F to +122°F)
0 to 95% RH, non-condensing
Response Time
Within 30 seconds (T90)
Continuous Operation
Alkaline battery: 15 hours Li-Ion battery: 10 hours 70°F (21°C)
Power Source
Li-Ion battery pack, or 3 "AA" Alkaline battery pack; interchangeable
Safety Rating
ATEX, TIIS, IECEx, CE, c CSA us classified (pending), as intrinsically safe. Class I, Division 1, Groups A, B, C, D
Dimension & Weight
c CSA us classified (pending), as intrinsically safe. Class I, Division 1, Groups A, B, C, D
Case Material
High dust & water resistant design. RFI shielded high impact plastic with protective rubber overmolding
Standard Accessories
Belt clip
Rubber nozzle, 2.5"
Datalogging software
10" Probe
Quick reference card
10' Hose
Training CD
Optional Accessories
SDM-2012 calibration stations
Calibration kit
Li-Ion battery pack
AC or DC Charger
Sample draw hoses (10' standard, up to 50' max. available)
Carrying case
1, 2, 3, 4, or 5 sensor units
Li-Ion or alkaline battery pack options
Two years material and workmanship

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