RKI Instruments GX-3R 4-Gas Monitor 72-RA-C Type A
Original price was: $1,499.00.$1,299.00Current price is: $1,299.00.
Condition: New – Open Box
Country of Origin: Japan
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RKI Instruments GX-3R Portable Gas Monitor P/N 72-RA-C Type A CO/H2S/LEL/O2
The RKI Instruments GX-3R Model 72-RA-C Type A is the smallest and lightest 4-gas personal monitor available. Measuring just 2.2 inches wide by 2.55 inches high by 1.02 inches deep and weighing a mere 3.52 ounces, this unit eliminates worker fatigue while delivering uncompromising safety monitoring inside confined spaces, ballast tanks, void spaces, and pump rooms.
It simultaneously and continuously monitors four core atmospheric hazards: Combustible gases LEL, Oxygen deficiency and enrichment O2, Carbon Monoxide CO, and Hydrogen Sulfide H2S. Utilizing advanced micro-sensor architecture, the unit features a dual-filament LEL sensor engineered for exceptional resistance to silicone poisoning, alongside a robust dual-tox CO and H2S combination sensor and a long-life electrochemical O2 cell.
Model Details
- Brand: RKI Instruments
- Product Category: Portable Multi-Gas Detectors and Personal Safety Monitors
- MPN Part Number: 72-RA-C Type A Configuration
- Condition: New
Technical Details
| Gas Parameter | Detection Range | Increment | Accuracy Statement |
|---|---|---|---|
| Combustible LEL Methane default | 0 to 100 percent LEL | 1 percent LEL | Plus or minus 5 percent of reading or plus or minus 2 percent LEL |
| Oxygen O2 | 0 to 40.0 percent Vol | 0.1 percent Vol | Plus or minus 0.5 percent of reading |
| Carbon Monoxide CO | 0 to 2000 ppm | 1 ppm | Plus or minus 5 percent of reading or plus or minus 2 ppm |
| Hydrogen Sulfide H2S | 0 to 200.0 ppm | 0.1 ppm | Plus or minus 5 percent of reading or plus or minus 2 ppm |
| General Technical Specifications | |
|---|---|
| Sampling Method | Diffusion standard with optional hand aspirator or RP-3R clip-on pump |
| Response Time | Within 30 seconds T90 |
| Power Source and Life | Lithium-ion rechargeable battery, approx 25 hours operation with 3-hour full charge |
| Ingress Protection | IP66 and IP68 water and dust resistant tested at 2m depth for 1 hour |
| Operating Temperature | -20 degrees C to +50 degrees C continuous |
| Dimensions and Weight | 58mm W x 65mm H x 26mm D, Weight: 100g 3.52 oz |
Key Features
- Ultra compact and lightweight form factor reduces physical obstruction on worker gear, fitting comfortably inside any breathing zone pocket or harness clip.
- Poison-resistant LEL sensor design utilizes dual active filaments in a single combustion sensor to drastically mitigate silicone poisoning failure risks.
- Tri-mode annunciation system features ultra bright flashing visual LEDs, distinct 100 dB dual audible buzzers at 30 cm, and active physical vibration alerts.
- Built-in non-compliance indicator flashes warning LEDs every 30 seconds if a scheduled bump test or calibration interval has lapsed.
- Extended field endurance delivers up to 25 hours of continuous logging operation on a single 3-hour lithium-ion charge cycle.
Applications
- Marine vessel cargo hold entry and double-bottom tank inspections
- Offshore oil and gas platform maintenance routines
- Confined space entry monitoring for shipyard workers and welders
- Municipal wastewater treatment and utility vault checks
- Chemical processing plant turnaround safety sweeps
Compatibility and Compatible Equipment
- Calibration Stations: Fully compatible with RKI SDM-3R automated calibration and bump test stations.
- Sampling Pumps: Integrates with the RP-3R motorized clip-on sample drawing pump for remote pre-entry testing up to 40 feet.
- Communication Accessories: Supports USB-to-IrDA data-logging download cables for event trend reporting.
Part Number Cross-References and Accessories
- Replacement LEL Sensor: Part number ESR-A1M
- Replacement Dual-Tox CO H2S Sensor: Part number ESR-A1DP-COHS
- Replacement Oxygen O2 Sensor: Part number OSM-1821
- Standard Rubber Protective Boot: Part number 20-0332
- Alligator Clip Assembly: Part number 13-0124
Frequently Asked Questions
What gases does the RKI GX-3R Type A configuration detect?
The Type A configuration simultaneously detects Combustible gases percentage LEL Methane default, Oxygen O2, Carbon Monoxide CO, and Hydrogen Sulfide H2S.
How long does the lithium-ion battery last on a full charge?
The internal rechargeable lithium-ion battery provides approximately 25 hours of continuous operation following a rapid 3-hour full charge cycle.
Are the sensors field-replaceable?
Yes, all sensors inside the GX-3R are modular and field-replaceable, allowing maintenance technicians to swap out expired cells in under a minute.
What does the non-compliance indicator signify?
The non-compliance indicator flashes the unit exterior LED lights every 30 seconds if the instrument has missed a scheduled bump test or calibration sequence.
Can the GX-3R be used with a remote sampling hose?
Yes, by attaching the optional RP-3R motorized clip-on sampling pump, users can pull samples safely from remote locations up to 40 feet away before entering confined spaces.
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