Name: Personal Gas Detection - Multi Gas - Confined Space Monitors - GX-3R and GX-3R Pro
SKU: 57210

Description

Overview of the GX-3R vs. GX-3R Pro: A Detailed Comparison of Personal Gas Monitors

The GX-3R is a highly portable and user-friendly four-gas confined space personal monitor designed for personal safety. Weighing only 100 grams, it’s the world’s smallest four-gas monitor, capable of simultaneously monitoring LEL combustibles, O2, CO (with a hydrogen-compensated option), and H2S. Its compact size makes it ideal for wearing within a worker’s breathing zone, ensuring accurate exposure monitoring.

The GX-3R Pro builds upon the foundation of the GX-3R by offering five-gas monitoring capabilities and advanced features. While maintaining a small form factor (only slightly larger at 129 grams), the GX-3R Pro adds a crucial 5th channel for detecting additional gases like ppm or % volume CO2 or SO2. This expanded detection range makes it suitable for a wider variety of industrial environments. Beyond gas detection, the GX-3R Pro incorporates Bluetooth communication for real-time data transmission to mobile devices, a man-down alarm for enhanced safety, and a unique non-compliance indicator that alerts supervisors to potential issues like gas exposure or overdue calibration. It also boasts a longer battery life, with options for alkaline or rechargeable power, and a 3-year warranty, making it a robust and reliable choice for comprehensive personal gas monitoring.

Additional information

Weight	N/A
Dimensions	N/A
Model	GX-3R, GX-3R Pro

GX-3R Pro Specifications and Gases

Common Specifications
Sampling Method	Diffusion sampling standard / hand aspirator or motorised pump optional
Display	Full dot LCD with Auto backlight and Autorotation
Safety Design / Approvals	EX IA IIC T4 GA (IECEx) I M1Ex da ia I Ma//II 1G Ex da ia IICT4 Ga (ATEX)
Alarm Types	Gas Alarm	Trouble Alarm
	• 2 increasing alarms • STEL TWA • O2 decreasing/increasing • Overscale alarm • O2 decreasing/increasing	• Sensor disconnection Low battery • Circuit error Calibration range error
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)
Pressure Range	Atmospheric pressure (11.6 – 15.9 psi)
Response Time	Within 30 seconds (T90)
Power Source	Lithium-ion battery, Approx. 25 hours after a 3 hour full charge, (Approx. 40 hours in “long life battery mode”)
Dimension & Weight	73 W x 65 H x 26 D mm), 129g (with rubber boot)
Case Material	Explosion proof, dust and water resistant to IP-68 (2m,1h) approval. Drop height 7m
Bluetooth Communication	BLE: with iOS and Android phone app
Datalogging	Logs user ID, station ID, Calibration & Bump Test history, Alarm Events & Alarm Trends
Standard Accessories	Alligator clip, Protective Rubber Boot, Charger, Calibration cup
Optional Accessories	• Padded carrying case • RP-3R Attachable sampling Pump with tapered rubber nipple, 3m hose and probe (up to 12m hose available) • USB to IrDA downloading cable for datalogger • SDM-3R calibration station • Calibration adapter
Warranty	Three years material and workmanship

Detectable Gases of the five gas personal monitor

Detectable Gases
Gas		Measuring Range	Accuracy Statement	Preset Alarms
*Sensor Slot 1: Hydrogen sulfide (H2S) & Carbon Monoxide (CO) Interchangeable**
H2S / CO	Dual EC	0 ~ 500.0 ppm (1 ppm	± 5% of reading or ± 5 ppm CO	A1: 30 ppm │ A2: 60 ppm \| TWA: 30 ppm \| STEL: 60 ppm │ Over Alarm 500 ppm
H2S / CO	Dual EC	0 ~ 100.0 ppm 0.1 ppm	± 5% of reading or ± 2 ppm H2S	A1: 10 ppm │ A2: 15 ppm │ TWA: 10 ppm \| STEL: 15 ppm │ Over Alarm: 100 ppm
CO H2 Compensated	EC	0 ~ 2,000 ppm	ppm ± 5% of reading or ± 5 ppm CO	A1: 1 ppm │ A2: 25 ppm \| A3:50 ppm │ TWA: 25 ppm │ STEL: 200 ppm
Sensor Slot 2: Combustibles (Methane as standard)
CH4 / HC	Catalytic	0 ~ 100% LEL (1% LEL)	± 5% of reading or ± 2 % LEL	1st: 5% LEL │ 2nd: 10% LEL \| Over:100% LEL
Sensor Slot 3: Oxygen (O2)
O2	EC	0 ~ 25.0% Vol. 0 ~ 40.0% Vol. (0.10%)	± 0.5% O2	Low 1: 19.5% │ 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
NH3		0 ~ 400.0 ppm (0.5 ppm)		A1: 25.0 ppm \| A2: 35.0 ppm \| A3: 300.0 ppm │ STEL: 1.0 ppm \| TWA: 0.30 ppm
NO2		0 ~ 20.00 ppm (0.05 ppm)		A1: 3.00 ppm│ A2: 5.00 ppm \| A3: 20.00 ppm│ TWA: 3 ppm \| STEL: 5.00 ppm
PH3		0 ~ 20.00 ppm (0.01 ppm		A1: 0.3 ppm│ A2: 1 ppm \| A3: 1 ppm │TWA: 3 ppm \| STEL: 1 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 %		0 ~ 10.0% Vol. (0.01%)		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

GX-3R Specifications and Gases

Gas Detected	All Combustible gases (Methane as standard)	Oxygen (O2)	Hydrogen Sulphide (H2S)	Carbon Monoxide (CO)
Detection Range (Increments)	0 – 100% LEL (1% LEL)	0 – 25.0% Vol (0.1% Vol)	0 – 100 ppm (0.5 ppm)	0 – 500 ppm (1 ppm)
Sampling Method	Diffusion sampling, hand aspirator or motorised pump optional
Display	Digital LCD displays with 7 segment plus 14 segment plus icon
Present Alarms (User Adjustable)	1st alarm 5% LEL 2nd alarm 10% LEL Over alarm 100% LEL	Low alarm 19.5% High alarm 23.5% Over alarm 40.0%	1st alarm 10 ppm 2nd alarm 15 ppm TWA alarm 10 ppm STEL alarm 15 ppm Over alarm 200 ppm	1st alarm 30 ppm 2nd alarm 60 ppm TWA alarm 30 ppm STEL alarm 60 ppm Over alarm 2000 ppm
Types of Alarms	Gas Alarm: Trouble Alarm: 2 Increasing alarms, STEL, TWA, overscale alarm. O2 decreasing/increasing. Sensor disconnection, low battery, circuit error, calibration range error
Display of Alarms	Gas Alarm: Trouble Alarm: Flashing LEDs, continuous buzzer (100 db @ 30 cm), flashing gas value, vibration Flashing LEDs, intermittent buzzer (95 db @ 30 cm), display of error message
Operating Temp & Humidity	40°C to +60°C, 0 to 95% RH, non-condensing (splash resistant)
Response Time	Within 30 seconds (T90)
Continuous Operation	25 hours after a full 3 hour charge
Power Source	Lithium-ion battery
Safety Design/Approvals	Ex da ia IIC T4 Ga or EX ia IIC T4 Ga and EX da ia I MA or EX ia I Ma (IECEx) / I M1Ex da ia I Ma//II 1G Ex da ia IICT4 Ga (ATEX)
Dimension & Weight	Approx 55mm (H) x 64mm (W) x 26mm (D), approx 100g
Case Material	Explosion proof, dust and water resistant to IP-68 (2m,1h) approval. Drop height 7m
Controls	Two buttons: POWER / MODE, AIR
Datalogging	Logs user ID, station ID, Calibration & Bump Test history, Alarm Events & Alarm Trends
Standard Accessories	Alligator clip Charger Calibration cup
Optional Accessories	Padded carrying case for GX-3R and accessories RP-3R Attachable sampling Pump with tapered rubber nipple, 3m hose and probe (up to 12m hose available) USB to IrDA downloading cable for datalogger SDM-3R calibration station Calibration Cup
Warranty	Three years material and workmanship

Downloads

GX-3R_Datasheet

GX-3R Pro Datasheet