GX-3R Pro 5 Gas Monitor LEL/O2/H2S & CO/SO2

RKI - GX-3R PRO

Smallest & lightest 5 gas monitor
2.9″ W x 2.6″ H x 1.06″ D , 4.58 ounces
Simultaneous detection of 5 gases

LEL, O2, H2S, CO, and other optional sensors

H2 Compensated CO sensor available
Simple 2-button operation
Bluetooth communication with iOS & Android App
Non-Compliance Indicator

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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 sensors. Two of the four sensor slots have interchangeable sensors providing flexible configurations, which can easily be changed in the field.

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.

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
		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
SO2	EC	0 ~ 100.0 ppm (0.05 ppm)	± 10% of reading or ± 5 % of full scale	A1: 2 ppm│ A2: 5 ppm A3: 100 ppm│ TWA: 0.25 ppm STEL: 0.25ppm
*CO2 IR sensor available AUG 2019
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
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 bump due 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 (Pending)