GX-3R Pro personal gas detector

Confined Space 5 Gas Monitor with Bluetooth Wireless Communication

Convenient

RKI GX-3R Pro is the world’s smallest 5-gas monitor weighing only 4.58 oz. Fits in the palm of your hand (2.9″ W x 2.6″ H x 1.06″ D).
Simultaneously monitors and displays 5 different gases (LEL, O₂, CO, H₂S, SO₂, HCN).
Monitors standard confined space gases.
Has a 5th channel to add infrared or toxic sensors.
Two of the four sensor slots have interchangeable sensors providing flexible configurations.

2019 Occupational Health & Safety award winner for “New Product of the Year” in the “Industrial Hygiene – Gas Monitors” category

Up-To-Date & Durable

GX-3R Pro comes equipped with:
- Bluetooth wireless communication to display direct gas readings from instrument to a phone app (free on iOS/Android phones)
- Automatic notifications programmed to send text/email messages if there is alarm event
- Man-down alarm
- Choice of alkaline or rechargeable power supply
- 3 year warranty
- Lithium-ion battery pack will operate for 25 hours and will fully charge in 3 hours.

Reliable

Safety supervisors will appreciate the non-compliance indicator.
Instrument flashes its 3 LED lights every 30 seconds in the following conditions:
- instrument has not been bump tested
- calibration is due
- 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 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, SO₂, and 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 & Gas
Water / Wastewater
Fire Services
Construction

Detectable Gases

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
H₂S / CO	Dual 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
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: 4.7 ppm
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: 2.00 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	IR	0 ~ 10,000 ppm (20 ppm)	± 5% of reading or ± 2 ppm	A1: 5,000 ppm│ A2: N/A TWA: N/A│STEL: N/A

Common Specifications

Sampling Method	Diffusion sampling standard (hand aspirator or clip-on motorized pump optional)
Display	Full dot LCD with Autobacklight and Autorotation
Alarm Types	Gas Alarm		Trouble Alarm
	2 increasing alarms STEL TWA Overscale alarm O₂ decreasing/ increasing		Sensor disconnection Low battery Circuit error Calibration range error Cal or bumpdue alarm
	• Man Down Alarm • Panic Alarm
Display of Alarm	Gas Alarm		Trouble Alarm
	Flashing LED’s Continuous buzzer (100 db @ 30cm) Flashing gas value Vibration		Flashing LED’s Intermittent buzzer (95 db @ 30cm) 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 Time	Within 30 seconds (T90)
Power Source	Config	Li-ion		Alkaline
	4-gas + EC	25 hours		16 hours
	4-gas + IR	16 hours		7 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)
Case Material	Explosion proof, 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
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 / Approvals	ATEX, CSA
Warranty	Three years material and workmanship including sensors