GX-3R Personal Gas Detector

Confined Space 4 Gas Monitor

Convenient

• RKI GX-3R is the world’s smallest 4-gas monitor weighing only 3.52 oz.
• Can comfortably be clipped within a worker’s breathing zone (2.2″ W x 2.55″ H x 1.02″ D).
• Simultaneously monitors and displays LEL combustibles, O₂, CO (Hydrogen compensated CO also available), and H₂S.

Up-To-Date & Durable

• Represents the latest evolution of gas detection technology utilizing a new generation of micro sensors.
• 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.
• New O₂ sensor is electrochemical with a 3 to 5 year life span. H₂S and CO are now available in a combo micro sensor.

Reliable

• Safety supervisors will appreciate the non-compliance indicator.
• Instrument flashes its 3 LED lights every 30 seconds in the following conditions:
  • if the instrument has not been bump tested
  • if calibration is due
  • 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.
• 30 second interval is adjustable.

FeaturesApplicationsSpecsVideosDownloadsPart #s

• Smallest & lightest 4 gas monitor
  • 2.2″ W x 2.55″ H x 1.02″ D, 3.52 oz
• Simultaneous detection of 4 gases
  • LEL, O₂, H₂S & CO
  • 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
• 3 Year warranty

• Personal monitoring
• Confined spaces
• Refineries / Petrochemical
• Utilities
• Oil & Gas
• Water / Wastewater
• Fire Services
• Construction

Gas Detected	(CO) H2 Compensated	Carbon Monoxide (CO)	Hydrogen Sulfide (H2S)	H2S Only		Combustible Gases (Methane as standard)	Oxygen
		Dual Sensor
Sensor Slot	1					2	3
Detection Principle	EC	Dual EC		EC		Catalytic combustion	EC
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 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
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
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
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 Time	Within 30 seconds (T90)
Power Source	Lithium-ion battery, Approx. 25 hours after a 3 hour full charge
Approvals	ATEX, CSA
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 oz (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 oz (approx. 105 g) with rubber booth
Case Material	Explosion proof, 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
Warranty	Three years material and workmanship

Software

• Datalogging Software for GX-3R (zip)
• IrDA Reprogramming Instructions (RKI website)

Literature

• Datasheet
• GX-3R Blow-out

Manuals

• Operator’s Manual
• Datalogging Manual
• Quick Reference Card

Bottom cover (sensor cap)Part #21-1962

Dust filterPart #33-0181

Sensor gasketPart #07-6057

Scrubber disc filter for LEL (Pack of 5)Part #33-7131   Scrubber disc filter to H₂S/CO (Pack of 5)Part #33-7132

Sensor retainerPart #21-1963

Oxygen sensor (blue)Part #ESR-X13P-OXY LEL sensorPart #NCR-6309 CO/H₂S sensorPart #ESR-A1DP-COHS

Rubber bootPart #20-0332

Rollover part for GX-3R component name and part number.