RIKEN KEIKI GX-3R - The smallest and lightest portable 4-gas detector in the world

Designation: HC or CH4 / O2 / CO / H2S

The GX-3R is the worlds smallest 4 gas monitor weighing only 3.52 ounces and can comfortably be clipped within a worker’s breathing zone (2.2” W x 2.55” H x 1.02” D). It simultaneously monitors and displays LEL combustibles, O2, CO (Hydrogen compensated CO also available), and H2S.

The GX-3R represents the latest evolution of gas detection technology utilizing a new generation of micro sensors. The LEL sensor has a unique design with two active filaments in one sensor to increase it’s resistance to silicone poisoning. If one filament gets poisoned the second filament takes over. The new O2 sensor is electrochemical with a 3 to 5 year life span. H2S and CO are now available in a combo micro sensor.

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.

GX-3R Four Gas Monitor callouts

Confined Space 4 Gas Monitor

Features

Smallest & lightest 4 gas monitor
- 2.2″ W x 2.55″ H x 1.02″ D, 3.52 ounces
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
25 hours of operation (Lithium-ion battery)
Water and dust resistant design, IP66/68
3 Year warranty
New Product of the Year 2020

Application

Personal monitoring
Confined spaces
Refineries/petrochemical
Utilities
Oil and 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	ca. 58 W x 65 H x 26 D mm, ca. approx. 100 g without rubber booth ca. 61 W x 67 H x 27 D mm, ca. 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