RKI GX-3R Confined Space 4 Gas Monitor
Features
- Smallest & lightest 4 gas monitor
- Simultaneous detection of 4 gases; LEL, O2, H2S & CO
- H2 Compensated CO sensor available
- Simple 2-button operation
- Alarms: audible, visual, & vibration
- 3 user adjustable alarm levels
- 25 hours of operation (Lithium-ion battery)
- Water and dust resistant design, IP66/68
- 3 Year warranty
Manuals
GX-3R Product Datatsheet [PDF]
GX-3R Quick Reference Guide [PDF]
GX-3R Manual [PDF]
GX-3R Manual TIIS approved version [PDF]
GX-3R Datalogging Manual [PDF]
IrDA Cable Driver Installation Guide [PDF]
Certificates / Approvals
TIIS Certificate
The GX-3R is the worlds 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 it’s 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.
Safety supervisors will appreciate the non-compliance indicator. The instrument flashes it’s 3 LED lights every 30 seconds in the following conditions; if the instrument has not been bump tested, or if calibration is due, or if there was a gas alarm event. The 3 LED lights will continue to flash once every 30 seconds until the non-compliance condition has been resolved. The 30 second interval is adjustable.
OSHA defines the breathing zone as a ten inch radius around the worker’s nose and mouth, and requires that worker exposure monitoring air samples be collected in the breathing zone. Air sampling filters may be attached to the collar or lapel. Traditionally this means only a single gas monitor would be small enough for a worker to practically wear a gas monitor ‘In the breathing zone’. Now there is a 4 gas monitor smaller than many single gas monitors.
Application
- Personal monitoring
- Confined spaces
- Refineries/petrochemical
- Utilities
- Oil and Gas
- Water/Wastewater
- Fire Services
- Construction
Specifications
| Gas Detected | (CO) H2 Compensated |
Carbon Monoxide(CO) | Hydrogen Sulfide(H2S) | H2S Only |
Combustible Gases (Methane as standard) |
Oxygen
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| Dual Sensor | |||||||||||
| Sensor Slot | 1 | 2 |
3
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| Detection Principle |
EC | Dual EC | EC | Catalytic combustion |
EC
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| 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%)
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| 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) |
± 0.5% of reading O2
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| Sampling Method | Diffusion sampling standard (hand aspirator or clip-on motorized pump optional) | ||||||||||
| Display | Digital LCD displays with 7 segment plus 14 segment plus icon | ||||||||||
| Preset Alarms (User Adjustable) Overscale alarm (Non-adjustable) |
1st alarm: 25.0 ppm 2nd alarm: 50.0 ppm 3rd alarm: 1200.0 ppm TWA alarm: 25.0 ppm STEL alarm: 200.0 ppm Over alarm: 2000.0 ppm |
1st alarm: 5.0 ppm 2nd alarm: 30.0 ppm 3rd alarm: 100.0 ppm TWA alarm: 1.0 ppm STEL alarm: 5.0 ppm Over alarm: 200.0 ppm |
1st alarm: 10% LEL 2nd alarm: 25% LEL 3rd alarm: 50% LEL Over alarm: 100% LEL |
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| Types of Alarms | Gas Alarm: 3 Increasing alarms, STEL, TWA, overscale alarm. O2 decreasing/increasing. Trouble alarm: Sensor disconnection, low battery, circuit error, calibration range error |
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| Display of Alarm | Gas 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 |
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| 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) |
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| Response Time | Within 30 seconds (T90) | ||||||||||
| Power Source | Lithium-ion battery, Approx. 25 hours after a 3 hour full charge | ||||||||||
| Approvals | ATEX, CSA, IECEx, MED | ||||||||||
| Dimension & Weight |
2.2” 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 |
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| Case Material | Dust and water resistant to IP-66/68 (2m,1h) approval. Drop height 23 ft | ||||||||||
| Controls | Two buttons: POWER / MODE, AIR | ||||||||||
| Datalogging | Logs user ID, station ID, Calibration & Bump Test history, Alarm Events & Alarm Interval Trends | ||||||||||
| Standard Accessories |
Alligator clip, protective rubber boot, charger, and 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 |
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| Warranty | Three years material and workmanship | ||||||||||
Parts
| Part # | Description |
| 07-6057 | Sensor gasket, GX-3R |
| 07-6058 | Sensor case o-ring, GX-3R |
| 10-1086 | Screw with flat and lock washers, M2 x 4 phillips |
| 10-1087 | Screw, GX-3R sensor cap & battery pack, 3/16 phillips |
| 13-0112RK | Wrist strap |
| 13-0124 | Alligator clip with installation screws |
| 13-0125 | Belt clip with installation screws |
| 20-0332 | Rubber boot for GX-3R |
| 21-1950 | LCD protective film for GX-3R/GX-3R Pro |
| 21-1962 | Bottom cover (sensor cap), GX-3R |
| 21-1963 | Sensor retainer, GX-3R |
| 21-1967 | Rear case assembly with Li-ion battery, GX-3R |
| 21-1968 | Front case with overlay, GX-3R |
| 29-0715 | Label, case sensor, CO, LEL, O2, GX-3R |
| 33-0183 | Sensor dust filter with internal gasket for GX-3R |
| 33-0183-10 | Sensor dust filters with internal gasket for GX-3R, 10-pack |
| 33-0553 | Buzzer protection cover for GX-3R |
| 33-7130 | Scrubber disk filter for H2S/CO sensor 5-pack |
| 33-7131 | Scrubber disk filter for LEL sensor, 5-pack |
| 33-7132 | Scrubber disk filter, charcoal, for CO & H2 comp CO sensor, GX-3R/GX-3R Pro, 5-pack |
| 33-7133 | Humidity filter disk for H2S sensor, GX-3R/GX-3R Pro, 5-pack |
| 51-1142 | LCD module with cable, for GX-3R |
| 57-2098 | Li-Ion battery with battery board |
| ESR-A1DP-COHS | Sensor, H2S/CO combo for GX-3R/GX-3R Pro |
| NCR-6309 | Sensor, LEL for GX-3R/GX-3R Pro |
| ESR-X13P-OXY | Sensor, O2 for GX-3R/GX-3R Pro |
| ESR-A13I-H2S | Sensor, H2S for GX-3R/GX-3R Pro |
| ESR-A13P-CO | Sensor, CO, GX-3R/3R Pro |
| ESR-A1CP-CO-H | Sensor, CO with H2 compensation for GX-3R/GX-3R Pro |
