RKI GX-3R, 4 Gas, LEL / O2 / combo H2S & CO, 72-RA-C

Original price was: $595.00.Current price is: $535.50.

SKU: 72-RA-C Categories: , , , Tags: ,


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The GX-3R is the world's smallest 4 gas monitor weighing only 3.52 ounces and can comfortably be clipped within a worker’s breathing zone (2.2” W x 2.55” H x 1.02” D). It simultaneously monitors and displays LEL combustibles, O2, CO (Hydrogen compensated CO also available), and H2S.

The GX-3R represents the latest evolution of gas detection technology utilizing a new generation of micro sensors. The LEL sensor has a unique design with two active filaments in one sensor to increase its resistance to silicone poisoning. If one filament gets poisoned the second filament takes over. The new O2 sensor is electrochemical with a 3 to 5 year life span. H2S and CO are now available in a combo micro sensor.
  • Smallest & lightest 4 gas monitor
    • 2.2″ W x 2.55″ H x 1.02″ D, 3.52 ounces
  • Simultaneous detection of 4 gases:
    • LEL, O2, H2S & CO H2
    • H2 Compensated CO sensor available
  • Simple 2-button operation
  • Non-Compliance Indicator
  • Alarms: audible, visual, & vibration
  • 3 user adjustable alarm levels
  • Impact resistant body with removable rubber boot
  • Large LCD Auto-backlit display
  • 25 hours of operation (Lithium-ion battery)
  • Field replaceable sensors & filters
  • Water and dust resistant design, IP66/68
  • Stealth mode for law enforcement
  • 3 Year warranty
  • Personal monitoring
  • Confined spaces
  • Refineries/petrochemical
  • Utilities
  • Oil and Gas
  • Water/Wastewater
  • Fire Services
  • Construction
Gas Detected(CO) H2 CompensatedCarbon Monoxide(CO)-Dual SensorHydrogen Sulfide(H2S)-Dual SensorH2S OnlyCombustible Gases (Methane as standard)Oxygen
Sensor Slot111123
Detection PrincipleECDual ECDual ECECCatalytic combustionElectrochemical cell
Detection Range (Increments)0 ~ 2,000 ppm (1 ppm)0 ~ 200.0 ppm (0.1 ppm)0 ~ 100% LEL (1% LEL)0 ~ 40% Vol. (0.1%)
Accuracy Statement± 5% of reading or ± 2 ppm CO± 5% of reading or ± 5 ppm CO (whichever is greater)± 5% of reading or ± 2 ppm H2S (whichever is greater)± 5% of reading or ± 2% LEL (whichever is greater)± 5% of reading O2
Sampling MethodDiffusion sampling standard (hand aspirator or clip-on motorized pump optional)
DisplayDigital LCD displays with 7 segment plus 14 segment plus icon
Preset Alarms (User Adjustable) Overscale alarm (Non-adjustable)1st alarm: 25.0 ppm 1st alarm: 5.0 ppm1st alarm: 10% LELLow 1 alarm: 19.5%
2nd alarm: 50.0 ppm2nd alarm: 30.0 ppm2nd alarm: 25% LELLow 2 alarm: 18.0%
3rd alarm: 1200.0 ppm3rd alarm: 100.0 ppm3rd alarm: 50% LELHigh alarm: 23.5%
TWA alarm: 25.0 ppmTWA alarm: 1.0 ppm Over alarm: 100% LELOver alarm: 40.0%
STEL alarm: 200.0 ppmSTEL alarm: 5.0 ppm
Over alarm: 2000.0 ppmOver alarm: 200.0 ppm
Types of AlarmsGas Alarm: 3 Increasing alarms, STEL, TWA, overscale alarm. O2 decreasing/increasing.
Trouble alarm: Sensor disconnection, low battery, circuit error, calibration range error
Display of AlarmGas Alarm: Flashing LEDs, continuous buzzer (100 db @ 30 cm), flashing gas value, vibration
Trouble alarm: Flashing LEDs, intermittent buzzer (95 db @ 30 cm), display of error message
Operating Temp. & Humidity-20°C ~ +50°C [ -4°F ~ +122°F ], 10 to 90% RH, non-condensing (continuous environment)
-40°C ~ +60°C [ -40°F ~ +140°F ], 0 to 95% RH, non-condensing (temporary environment, 15 minutes)
Response TimeWithin 30 seconds (T90)
Power SourceLithium-ion battery, Approx. 25 hours after a 3 hour full charge
ApprovalsATEX, CSA
Dimension & Weight2.2” W x 2.55” H x 1.02” D (Approx. 58 W x 65 H x 26 D mm), 3.52 ounces (approx. 100 g) without rubber booth
2.4” W x 2.63” H x 1.06” D (Approx. 61 W x 67 H x 27 D mm), 3.70 ounces (approx. 105 g) with rubber booth
Case MaterialExplosion proof, dust and water resistant to IP-66/68 (2m,1h) approval. Drop height 23 ft.
ControlsTwo buttons: POWER / MODE, AIR
DataloggingLogs user ID, station ID, Calibration & Bump Test history, Alarm Events & Alarm Interval Trends
Standard Accessories-Alligator clip
-protective rubber boot
-calibration adapter
Optional Accessories-SDM-3R calibration station
-RP-3R Clip-on sampling pump with 4” rubber nipple, 10’ hose and probe (up to 40’ hose available)
-Padded carrying case for GX-3R and accessories
-USB to IrDA downloading cable for datalogger
WarrantyThree years material and workmanship
Item TypePart NumberDescription
Maintenance07-6057Sensor gasket, GX-3R
Maintenance07-6058Sensor case o-ring, GX-3R
Repair10-1086Screw with flat & lock washers for GX-3R/GX-3R Pro belt clip, M2 x 4, SS, pan head, phillips
Repair10-1087Screw for GX-3R/GX-3R Pro sensor cap & battery pack, M2 x 10, SS, phillips, 1 each
Repair13-0112RKWrist strap
Repair13-0124Alligator clip with installation screws
Repair13-0125Belt clip with installation screws
Repair20-0332Rubber boot for GX-3R
Repair21-1950LCD protective film for GX-3R/GX-3R Pro
Repair21-1950-05LCD protection film for GX-3R, pack of 5
Repair21-1962Bottom cover (sensor cap), GX-3R
Repair21-1963Sensor retainer, GX-3R
Repair21-1967Rear case assembly with Li-ion battery, GX-3R
Repair21-1968Front case with overlay, GX-3R
Repair29-0715Label, case sensor, CO, LEL, O2, GX-3R
Maintenance33-0183Sensor dust filter with internal gasket for GX-3R
Maintenance33-0183-10Sensor dust filters with internal gasket for GX-3R, 10-pack
Repair33-0553Buzzer protection cover for GX-3R
Maintenance33-7130Scrubber disk filter for H2S/CO sensor 5-pack
Maintenance33-7131Scrubber disk filter for LEL sensor, 5-pack
Maintenance33-7132Scrubber disk filter, charcoal, for CO & H2 comp CO sensor, GX-3R/GX-3R Pro, 5-pack
Maintenance33-7133Humidity filter disk for H2S sensor, GX-3R/GX-3R Pro, 5-pack
Repair51-1142LCD module with cable, for GX-3R
Repair57-2098Li-Ion battery with battery board
MaintenanceESR-A13I-H2SSensor, Hydrogen Sulfide (H2S) 0-200 ppm for GX-3R/GX-3R Pro/GasWatch 3
MaintenanceESR-A13P-COSensor, Carbon Monoxide (CO) 0-2000 ppm for GX-3R/GX-3R Pro/GasWatch 3
MaintenanceESR-A1CP-CO-HSensor, Carbon Monoxide (CO) 0-2000 ppm with H2 compensation for GX-3R/GX-3R Pro/GasWatch 3/04 Series
MaintenanceESR-A1DP-COHSSensor, H2S/CO combination, CO 0-2000 ppm, H2S 0-200 ppm for GX-3R / GX-3R Pro / GasWatch 3 / 04 Series
MaintenanceESR-X13P-OXYSensor, Oxygen (O2) 0-25% vol for GX-3R/GX-3R Pro
MaintenanceNCR-6309Sensor, LEL for GX-3R/GX-3R Pro

Additional information

Weight 1 lbs