GX-3R Pro

  • Sale!

    RKI GX-3R Pro, 4 gas, LEL / O2 / H2S / CO (H2 compensated) with 100-240 VAC charger, 72-PCX-C

    $1,030.50
  • Sale!

    RKI GX-3R Pro, 4 gas, LEL / O2 / combo H2S & CO with Li-Ion battery & 100-240 VAC charger, 72-PAX-C

    $805.50

GX-3R Pro

The GX-3R Pro is the world’s smallest 5-gas monitor weighing only 4.58 ounces and fits in the palm of your hand (2.9” W x 2.6” H x 1.06” D). It simultaneously monitors and displays 5 different gases. In addition to monitoring standard confined space gases, LEL, O2, CO, & H2S, the GX-3R Pro has a 5th channel where you can add infrared or toxic gas sensors. Two of the four sensor slots have interchangeable sensors providing flexible configurations, which can easily be changed in the field.
  • Smallest & lightest 5 gas monitor
    • 2.9″ W x 2.6″ H x 1.06″ D , 4.58 ounces
  •  Simultaneous detection of 5 gases
    • Confined Space Gases: LEL, O2, H2S, CO
    • Toxic/IR Gases: HCN, NO2, PH3, SO2, & CO2
    • H2 Compensated CO sensor available
  • Simple 2-button operation
  • Bluetooth communication with iOS & Android App
  • Non-Compliance Indicator
  • 3 user adjustable alarm levels
  • Panic Alarm
  • Man Down Alarm
  • Impact resistant body
  • Large full dot, auto-backlit display with auto-rotation
  • Stealth mode for law enforcement
  • Field replaceable sensors & filters
  • Water and dust resistant design, IP66/68
  • 3 Year Warranty
  • Personal monitoring
  • Confined spaces
  • Refineries/petrochemical
  • Utilities
  • Oil and Gas
  • Water/Wastewater
  • Fire Services
  • Law Enforcement
  • Construction
Common Specifications
Sampling MethodDiffusion sampling standard (hand aspirator or clip-on motorized pump optional)
DisplayFull dot LCD with Autobacklight and Autorotation
Alarm TypesGas AlarmTrouble Alarm
• 2 increasing alarms
• STEL
• TWA
• Overscale alarm
• O2 decreasing/ increasing
• Sensor disconnection
• Low battery
• Circuit error
• Calibration range error
• Cal or bump due alarm
• Man Down Alarm
• Panic Alarm
Display of AlarmGas AlarmTrouble Alarm
• Flashing LED’s
• Continuous buzzer (100 db @ 30cm)
• Flashing gas value
• Vibration
• Flashing LED’s
• 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)
Response TimeWithin 30 seconds (T90)
Power SourceConfigLi-ionAlkaline
4-gas + EC25 hours16 hours
4-gas + IR16 hours7 hours
Dimensions2.9” W x 2.6” H x 1.06” D (Approx. 73 W x 65 H x 26 D mm)
Weight4.58 oz (with rubber boot)
Case MaterialExplosion proof, dust and water resistant to IP-66/68 (2m,1h) approval.
Drop height 23 ft
Bluetooth CommunicationBLE: with iOS and Android phone app: RK Link
DataloggingLogs user ID, station ID, Calibration & Bump Test history, Alarm Events & Alarm Trends
Standard Accessories-Alligator clip
-Protective rubber boot,
-Charger
-Calibration adapter
Optional Accessories• Padded carrying case
• RP-3R Attachable sampling Pump with 4” rubber nipple, 10’ hose and probe (up to 40’ hose available)
• USB to IrDA downloading cable for datalogger
• SDM-3R calibration station
• Hand aspirator
Safety Design / ApprovalsATEX, CSA
WarrantyThree years material and workmanship including sensors
Detectable Gases
GasMeasuring Range (Increments)Accuracy StatementPreset Alarms
Sensor Slot 1: Carbon Monoxide (CO) & Hydrogen sulfide (H2S) *Interchangeable
H2S / CODual EC0 ~ 2000 ppm (1 ppm)± 5% of reading or ± 5 ppm COA1: 25 ppm
A2: 50 ppm
A3: 1200 ppm
TWA: 25 ppm
STEL: 200 ppm
Dual EC0 ~ 200.0 ppm (0.1 ppm)± 5% of reading or ± 2 ppm H2SA1: 5 ppm
A2: 30 ppm
A3: 100 ppm
TWA: 1.0 ppm
STEL: 5.0 ppm
H2S OnlyEC0 ~ 200.0 ppm (0.1 ppm)± 5% of reading or ± 2 ppm H2SA1: 5 ppm
A2: 30 ppm
A3: 100 ppm
TWA: 1.0 ppm
STEL: 5.0 ppm
CO H2 CompensatedEC0 ~ 2,000 ppm± 5% of reading or ± 2 ppm COA1: 25 ppm
A2: 50 ppm
A3: 1200 ppm
TWA: 25 ppm
STEL: 200 ppm
Sensor Slot 2: Combustibles (Methane as standard)
CH4 / HCCatalytic0 ~ LEL (1% LEL)± 5% of reading or ± 2 % LEL1st: 10% LEL
2nd: 25% LEL
3rd: 50% LEL
Over: 100% LEL
Sensor Slot 3: Oxygen (O2)
O2EC0 ~ 40.0% Vol. (0.10%)± 0.5% O2Low 1: 19.5%
Low 2: 18.0%
High: 23.5%
Over: 40.0%
Sensor Slot 4: Toxics & CO2 *Interchangeable
HCNEC0 ~ 30.0 ppm (0.1 ppm)± 10% of reading or ± 5 % of full scaleA1: 5.0 ppm
A2: 10.00 ppm
A3: 30.00 ppm
TWA: 4.7 ppm
STEL: 10 ppm
NO2EC0 ~ 20.00 ppm (0.05 ppm)± 10% of reading or ± 5 % of full scaleA1: 2.00 ppm
A2: 4.00 ppm
A3: 20.00 ppm
TWA: 0.50 ppm
STEL: 1.0 ppm
PH3EC0 ~ 20.00 ppm (0.01 ppm)± 10% of reading or ± 5 % of full scaleA1: 0.30 ppm
A2: 0.60 ppm
A3: 0.60 ppm
TWA: 0.30 ppm
STEL: 1.0 ppm
SO2EC0 ~ 100.0 ppm (0.05 ppm)± 10% of reading or ± 5 % of full scaleA1: 2 ppm
A2: 5 ppm
A3: 100 ppm
TWA: 0.25 ppm
STEL: 0.25 ppm
CO2 %IR*0 ~ 10.0% Vol. (0.01%)± 5% of reading or ± 2 ppmA1: 0.50% Vol.
A2: 3.00% Vol.
A3: 4.00% Vol.
TWA: 0.50% Vol.
STEL: 3.00% Vol.
CO2 ppmIR*0 ~ 10,000 ppm (20 ppm)± 5% of reading or ± 2 ppmA1: 5,000 ppm
A2: N/A
TWA: N/A
STEL: N/A
Item TypePart NumberDescription
Maintenance07-6054Sensor gasket, GX-3R Pro
Maintenance07-6055Sensor case o-ring, GX-3R Pro
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
Repair20-0335Rubber boot for GX-3R Pro
Repair21-1950LCD protective film for GX-3R/GX-3R Pro
Repair21-1950-05LCD protection film for GX-3R/GX-3R Pro, pack of 5
Repair21-1960Bottom cover (sensor cap), GX-3R Pro
Repair21-1961Sensor retainer, GX-3R Pro
Repair29-0700Sensor case label for GX-3R Pro, CO / H2S / LEL / O2 / Toxic
Maintenance33-0184-10Sensor dust filters with internal gasket for GX-3R Pro, 10-pack
Repair33-0554Buzzer protection cover for GX-3R Pro
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
Maintenance33-7134H2S scrubber disk for SO2 sensor, GX-3R Pro, 5-pack
Repair49-1625Li-Ion battery pack for GX-3R Pro
Repair49-1626Alkaline battery pack for GX-3R Pro
MaintenanceESR-A13D-SO2Sensor, Sulfur Dioxide (SO2) 0-100 ppm for GX-3R Pro/SC-04
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
MaintenanceIRR-0409Sensor, CO2, 0-10% volume for GX-3R Pro
MaintenanceIRR-0433Sensor, CO2, 0-10,000 PPM for GX-3R Pro
  • Wrist strap

    Wrist strap, GX-2009/GX-2012

    $4.00
  • Placeholder

    Sensor gasket, GX-3R Pro

    $4.40
  • Placeholder

    Sensor case o-ring, GX-3R Pro

    $4.40
  • Placeholder

    Screw with flat & lock washers for GX-3R/GX-3R Pro belt clip, M2 x 4, SS, pan head, phillips

    $1.00
  • Placeholder

    Screw for GX-3R/GX-3R Pro sensor cap & battery pack, M2 x 10, SS, phillips, 1 each

    $1.00
  • Placeholder

    Alligator clip with installation screws

    $26.00
  • Placeholder

    Belt clip with installation screws

    $28.00
  • Placeholder

    Rubber boot for GX-3R Pro

    $18.00
  • Placeholder

    LCD protective film for GX-3R/GX-3R Pro

    $6.00
  • Placeholder

    LCD protection film for GX-3R/GX-3R Pro, pack of 5

    $29.00
  • Placeholder

    Bottom cover (sensor cap), GX-3R Pro

    $9.80
  • Placeholder

    Sensor retainer, GX-3R Pro

    $4.40
  • Placeholder

    Sensor case label for GX-3R Pro, CO / H2S / LEL / O2 / Toxic

    $1.00
  • Placeholder

    Sensor dust filters with internal gasket for GX-3R Pro, 10-pack

    $145.00
  • Placeholder

    Buzzer protection cover for GX-3R Pro

    $6.80
  • Placeholder

    Scrubber disk filter for H2S/CO sensor 5-pack

    $26.00
  • Placeholder

    Scrubber disk filter for LEL sensor, 5-pack

    $26.00
  • Placeholder

    Scrubber disk filter, charcoal, for CO & H2 comp CO sensor, GX-3R/GX-3R Pro, 5-pack

    $26.00
  • Placeholder

    Humidity filter disk for H2S sensor, GX-3R/GX-3R Pro, 5-pack

    $35.00
  • Placeholder

    H2S scrubber disk for SO2 sensor, GX-3R Pro, 5-pack

    $35.00
  • Placeholder

    Li-Ion battery pack for GX-3R Pro

    $250.00
  • Placeholder

    Alkaline battery pack for GX-3R Pro

    $125.00
  • Sensor, Sulfur Dioxide (SO2) 0-100 ppm for GX-3R Pro/SC-04

    $240.00
  • Sensor, Hydrogen Sulfide (H2S) 0-200 ppm for GX-3R/GX-3R Pro/GasWatch 3

    $150.00
  • Sensor, Carbon Monoxide (CO) 0-2000 ppm for GX-3R/GX-3R Pro/GasWatch 3

    $150.00
  • Sensor, Carbon Monoxide (CO) 0-2000 ppm with H2 compensation for GX-3R/GX-3R Pro/GasWatch 3/04 Series

    $240.00
  • H2S/CO Sensor

    Sensor, H2S/CO combination, CO 0-2000 ppm, H2S 0-200 ppm for GX-3R / GX-3R Pro / GasWatch 3 / 04 Series

    $240.00
  • O2 Sensor

    Sensor, Oxygen (O2) 0-25% vol for GX-3R/GX-3R Pro

    $150.00
  • LEL Sensor

    Sensor, LEL for GX-3R/GX-3R Pro

    $150.00
  • Sensor, CO2, 0-10% volume for GX-3R Pro

    $400.00
  • Sensor, CO2, 0-10,000 PPM for GX-3R Pro

    $400.00
  • 81-1199, RP-3R Pro Pump with Tapered Red Nozzle for GX-3R Pro

    $360.00
  • 81-1200-20, RP-3R Pro Pump with 20 ft hose, 10 in probe, and tapered red nozzle for GX-3R Pro

    $425.00
  • 81-1200, RP-3R Pro Pump with 10 ft hose, 10 in probe, and tapered red nozzle for GX-3R Pro

    $420.00
  • AC Adapter for GX-3R, GX-3R Pro

    $90.00
  • DC Adapter with Vehicle Plug & 4 ft Cable, 12-24 VDC for GX-3R/GX-3R Pro

    $50.00
  • Downloading Cable, USB/IrDA adapter

    $220.00
  • Multi-unit AC adapter, 100 – 240 VAC (5.99 VDC out) for charging 5 instruments, GX-3R / GX-3R Pro

    $265.00
  • Padded carrying case for one GX-3R, GX-3R Pro, GX-2009 or 03 series instrument and charger only

    $54.00
  • Sensor, Sulfur Dioxide (SO2) 0-100 ppm for GX-3R Pro/SC-04

    $240.00
  • Sensor, Hydrogen Sulfide (H2S) 0-200 ppm for GX-3R/GX-3R Pro/GasWatch 3

    $150.00
  • Sensor, Carbon Monoxide (CO) 0-2000 ppm for GX-3R/GX-3R Pro/GasWatch 3

    $150.00
  • Sensor, Carbon Monoxide (CO) 0-2000 ppm with H2 compensation for GX-3R/GX-3R Pro/GasWatch 3/04 Series

    $240.00
  • H2S/CO Sensor

    Sensor, H2S/CO combination, CO 0-2000 ppm, H2S 0-200 ppm for GX-3R / GX-3R Pro / GasWatch 3 / 04 Series

    $240.00
  • O2 Sensor

    Sensor, Oxygen (O2) 0-25% vol for GX-3R/GX-3R Pro

    $150.00
  • LEL Sensor

    Sensor, LEL for GX-3R/GX-3R Pro

    $150.00
  • Sensor, CO2, 0-10% volume for GX-3R Pro

    $400.00
  • Placeholder

    Sensor, Chlorine (Cl2) 0-10 ppm for GX-3R Pro / SC-04

    $240.00
  • Sensor, CO2, 0-10,000 PPM for GX-3R Pro

    $400.00
  • Sensor, Hydrogen Cyanide (HCN) 0-30 ppm for GX-3R Pro / SC-04

    $240.00
  • Sensor, Nitrogen Dioxide (NO2) 0-20 ppm for GX-3R Pro / SC-04

    $240.00
  • O2 Sensor

    Sensor, O2 for GX-3R/GX-3R Pro

    $250.00
  • Sensor, Phosphine (PH3) 0-20.00 ppm for GX-3R Pro / SC-04

    $240.00
  • RKI GX-3R / GX-3R Pro 81-GX3RCO Calibration Kit, 103L cyl CO 50 ppm / CH4 50% LEL / O2 12% in N2

    $340.00
  • RKI GX-3R / GX-3R Pro 81-GX3RCO-LV Calibration Kit, 34L cyl CO 50 ppm / CH4 50% LEL / O2 12% in N2

    $265.00
  • RKI GX-3R / GX-3R Pro 81-GX3RHSCO Calibration Kit, 58AL cyl H2S 25 ppm / CO 50 ppm / CH4 50% LEL / O2 12% in N2

    $380.00
  • 81-GX3RHSCO-116, Calibration Kit, GX-3R / GX-3R Pro

    RKI GX-3R / GX-3R Pro 81-GX3RHSCO-116 Calibration Kit, 116AL cyl H2S 25 ppm / CO 50 ppm / CH4 50% LEL / O2 12% in N2

    $490.00
  • RKI GX-3R / GX-3R Pro 81-GX3RHSCO-LV Calibration Kit, 34AL cyl H2S 25 ppm / CO 50 ppm / CH4 50% LEL / O2 12% in N2

    $355.00
  • RKI GX-3R Pro 81-PAA Calibration Kit, 58AL cyl H2S 25 ppm/ CO 50 ppm/ CH4 50% LEL / O2 12% in N2, 103L cyl 5,000 ppm CO2 in N2

    $580.00
  • RKI GX-3R Pro 81-PAA-LV Calibration Kit, 34AL cyl H2S 25 ppm/ CO 50 ppm/ CH4 50% LEL / O2 12% in N2, 34L cyl 5,000 ppm CO2 in N2

    $495.00
  • RKI GX-3R Pro 81-PAB Calibration Kit, 58AL cyl H2S 25 ppm/ CO 50 ppm/ CH4 50% LEL / O2 12% in N2, 103L cyl 2.5% vol CO2 in N2

    $580.00
  • RKI GX-3R Pro 81-PAB-LV Calibration Kit, 34AL cyl H2S 25 ppm/ CO 50 ppm/ CH4 50% LEL / O2 12% in N2, 34L cyl 2.5% vol CO2 in N2

    $475.00
  • RKI GX-3R Pro 81-PAC Calibration Kit, 58AL cyl SO2 5 ppm/ H2S 25 ppm/ CO 50 ppm/ CH4 50% LEL / O2 12% in N2

    $410.00
  • 81-GX3RHSCO-116, Calibration Kit, GX-3R / GX-3R Pro

    RKI GX-3R Pro 81-PCX-LV Calibration Kit, 34AL cyl H2S 25 ppm / CO 50 ppm / CH4 50% LEL / O2 12% in N2, 103L cyl H2 2000 ppm in air

    $485.00
  • SDM-3R calibration station with 1 solenoid, AC adapter, flash drive, USB cable, and tubing

    SDM-3R calibration station with 1 solenoid

    $1,300.00
  • SDM-3R calibration station with 1 solenoid, demand flow regulator, AC adapter, flash drive, USB cable, and tubing

    SDM-3R calibration station with 1 solenoid, demand flow regulator

    $1,580.00
  • SDM-3R calibration station with 1 solenoid, demand flow regulator, 58AL cyl H2S/CO/CH4/O2, cylinder holder, AC adapter, flash drive, USB cable, and tubing

    SDM-3R calibration station with 1 solenoid, demand flow regulator, 58AL cyl H2S/CO/CH4/O2

    $1,835.00
  • SDM-3R calibration station with 1 solenoid, demand flow regulator, 34AL cyl H2S/CO/CH4/O2, cylinder holder, AC adapter, flash drive, USB cable, and tubing

    SDM-3R calibration station with 1 solenoid, demand flow regulator, 34AL cyl H2S/CO/CH4/O2

    $1,760.00
  • RKI SDM-3R calibration station with 2 solenoids, AC adapter, flash drive, USB cable, and tubing

    RKI SDM-3R calibration station with 2 solenoids

    $1,450.00
  • RKI SDM-3R calibration station with 2 solenoids, demand flow regulator, 34AL cyl H2S/CO/CH4/O2, cylinder holder, AC adapter, flash drive, USB cable, and tubing

    RKI SDM-3R calibration station with 2 solenoids, demand flow regulator, 34AL cyl H2S/CO/CH4/O2

    $1,890.00
  • RKI SDM-3R calibration station with 2 solenoids, demand flow regulator, 58AL cyl H2S/CO/CH4/O2, cylinder holder, AC adapter, flash drive, USB cable, and tubing

    RKI SDM-3R calibration station with 2 solenoids, demand flow regulator, 58AL cyl H2S/CO/CH4/O2

    $1,935.00
  • RKI SDM-3R calibration station with 2 solenoids, demand flow regulators (2 each), AC adapter, flash drive, USB cable, and tubing

    RKI SDM-3R calibration station with 2 solenoids, demand flow regulators (2 each)

    $2,030.00
  • RKI SDM-3R calibration station with 3 solenoids, AC adapter, flash drive, USB cable, and tubing

    RKI SDM-3R calibration station with 3 solenoids

    $1,600.00
  • RKI SDM-3R calibration station with 3 solenoids, demand flow regulator, 34AL cyl H2S/CO/CH4/O2, cylinder holder, AC adapter, flash drive, USB cable, and tubing

    RKI SDM-3R calibration station with 3 solenoids, demand flow regulator, 34AL cyl H2S/CO/CH4/O2

    $2,040.00
  • RKI SDM-3R calibration station with 3 solenoids, demand flow regulator, 58AL cyl H2S/CO/CH4/O2, cylinder holder, AC adapter, flash drive, USB cable, and tubing

    RKI SDM-3R calibration station with 3 solenoids, demand flow regulator, 58AL cyl H2S/CO/CH4/O2

    $2,085.00
  • RKI SDM-3R calibration station with 3 solenoids, demand flow regulators (3 each), AC adapter, flash drive, USB cable, and tubing

    RKI SDM-3R calibration station with 3 solenoids, demand flow regulators (3 each)

    $2,440.00

  • RKI GX-3R Pro, 5 gas, LEL / O2 / combo H2S & CO / ppm CO2 with 100-240 VAC charger, 72-PAA-C

    $1,145.00
  • RKI GX-3R Pro, 5 gas, LEL / O2 / combo H2S & CO / SO2 100 ppm with Li-Ion battery pack including 100-240 VAC charger, 72-PAC-C

    $1,145.00
  • RKI GX-3R Pro, 5 gas, LEL / O2 / combo H2S & CO / % CO2 with 100-240 VAC charger, 72-PAB-C

    $1,295.00