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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 (Hydrogen Cyanide (HCN) and Nitrogen Dioxide (NO2) sensors are currently available for the GX-3R Pro). Two of the four sensor slots have interchangeable sensors providing flexible configurations, which can easily be changed in the field.
RKI is pleased to announce the availability of These 2 sensors are in stock and are the latest in toxic gas options added to the line of GX-3R Pro sensors.
The GX-3R Pro comes equipped with Bluetooth wireless communication, man-down alarm, the choice of alkaline or rechargeable power supply, and a 3 year warranty. The Lithium-ion battery pack will operate for 25 hours and will fully charge in 3 hours.
The GX-3R Pro utilizes Bluetooth communication to display direct gas readings from the instrument to a phone app, which is available free on either iOS or Android phones. Automatic notifications can be programmed to send text or email messages if there is an alarm event from the
GX-3R Pro.
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.
* 3 year warranty on material and workmanship including sensors (1 year for Ammonia sensor)
| Gas | Measuring Range (Increments) |
Accuracy Statement |
Preset Alarms | |
| Sensor Slot 1: Carbon Monoxide (CO) & Hydrogen sulfide (H2S) *Interchangeable | ||||
| H2S / CO | Dual EC | 0 ~ 2000 ppm (1 ppm) |
± 5% of reading or ± 5 ppm CO |
A1: 25 ppm│ A2: 50 ppm │ A3:1200 ppm│TWA: 25 ppm │ STEL: 200 ppm |
| 0 ~ 200.0 ppm (0.1 ppm) |
± 5% of reading or ± 2 ppm H2S |
A1: 5 ppm│ A2: 30 ppm │ A3: 100 ppm│TWA: 1.0 ppm │ STEL: 5.0 ppm | ||
| H2S Only |
EC | 0 ~ 200.0 ppm (0.1 ppm) |
± 5% of reading or ± 2 ppm H2S |
A1: 5 ppm│ A2: 30 ppm │ A3: 100 ppm│TWA: 1.0 ppm │ STEL: 5.0 ppm |
| CO H2 Compensated |
EC | 0 ~ 2,000 ppm | ± 5% of reading or ± 2 ppm CO |
A1: 25 ppm│ A2: 50 ppm │ A3: 1200 ppm│TWA: 25 ppm │ STEL: 200 ppm |
| Sensor Slot 2: Combustibles (Methane as standard) | ||||
| CH4 / HC | Catalytic | 0 ~ LEL (1% LEL) | ± 5% of reading or ± 2 % LEL |
1st: 10% LEL │ 2nd: 25% LEL │ 3rd: 50% LEL │ Over:100% LEL |
| Sensor Slot 3: Oxygen (O2) | ||||
| O2 | EC | 0 ~ 40.0% Vol. (0.10%) |
± 0.5% O2 | Low 1: 19.5%│ Low 2: 18.0% │High: 23.5%│ Over: 40.0% |
| Sensor Slot 4: Toxics & CO2 *Interchangeable | ||||
| HCN | EC | 0 ~ 30.0 ppm (0.1 ppm) |
± 10% of reading or ± 5 % of full scale |
A1: 5.0 ppm│ A2: 10.00 ppm │ A3: 30.00 ppm│ TWA: 4.7 ppm │ STEL: 10 ppm |
| NH3 | 0 ~ 400.0 ppm (0.5 ppm) |
A1: 25.0 ppm │ STEL: 1.0 ppm│ A2: 35.0 ppm│ TWA: 0.30 ppm│A3: 300.0 ppm |
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| NO2 | 0 ~ 20.00 ppm (0.05 ppm) |
A1: 2.00 ppm│ A2: 4.00 ppm │ A3: 20.00 ppm│ TWA: 0.20 ppm │ STEL: 1.00 ppm | ||
| PH3 | 0 ~ 20.00 ppm (0.01 ppm) | A1: 0.30 ppm │ STEL: 1.0 ppm │ A2: 0.60 ppm │ TWA: 0.30 ppm │ A3: 0.60 ppm | ||
| SO2 | 0 ~ 100.0 ppm (0.05 ppm) |
A1: 2 ppm│ A2: 5 ppm │ A3: 100 ppm│ TWA: 0.25 ppm │ STEL: 0.25ppm | ||
| CO2 % | IR | 0 ~ 10.0% Vol. (0.01%) |
± 5% of reading or ± 2 ppm |
A1: 0.50% Vol.│ A2: 3.00% Vol. │ A3: 4.00% Vol.│ TWA: 0.50% Vol. │ STEL: 3.00% Vol. |
| CO2 ppm | 0 ~ 10,000 ppm (20 ppm) |
A1: 5,000 ppm│ A2: N/A │ TWA: N/A│STEL: N/A | ||
Common Specifications |
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| Sampling Method | Diffusion sampling standard (hand aspirator or clip-on motorized pump optional) |
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| Display | Full dot LCD with Autobacklight and Autorotation |
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| Alarm Types | Gas Alarm | Trouble Alarm | ||
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| • Man Down Alarm • Panic Alarm |
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| Display of Alarm | Gas Alarm | Trouble Alarm | ||
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| Operating Temp. & Humidity | -20°C ~ +50°C [ -4°F ~ +122°F ] 10 to 90% RH, non-condensing (continuous environment) |
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| -40°C ~ +60°C [ -40°F ~ +140°F ] 0 to 95% RH, non-condensing (temporary environment) |
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| Response Time | Within 30 seconds (T90) | |||
| Power Source | Config | Li-ion | Alkaline | |
| 4-gas + EC | 25 hours | 16 hours | ||
| 4-gas + EC with Bluetooth | 23 hours | 14 hours | ||
| 4-gas + IR | 16 hours | 7 hours | ||
| 4-gas + IR with Bluetooth | 15 hours | 6 hours | ||
| Dimension & Weight | 2.9” W x 2.6” H x 1.06” D (Approx. 73 W x 65 H x 26 D mm), 4.58oz (with rubber boot) |
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| Case Material | Dust and water resistant to IP-66/68 (2m,1h) approval. Drop height 23 ft | |||
| Bluetooth Communication | BLE: with iOS and Android phone app: RK Link | |||
| Datalogging | Logs user ID, station ID, Calibration & Bump Test history, Alarm Events & Alarm Trends |
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| Standard Accessories | Alligator clip, protective rubber boot, charger, calibration adapter | |||
| Optional Accessories |
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| Safety Design / Approvals | ATEX, CSA, TIIS | |||
| Warranty |
Three years material and workmanship including sensors (1 year for Ammonia sensor) |
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