GP-03
Combustible Gas Monitor
The GP-03 by RKI Instruments is one of the world’s smallest and lightest combustible gas monitors, offering personal protection from exposure to combustible hydrocarbons in hazardous locations. Weighing just 80 grams and small enough to fit in a shirt pocket, the GP-03 delivers up to 35 hours of continuous operation on standard alkaline batteries, with audible, visual and vibration alarms, Peak Hold, STEL and TWA monitoring, and data logging as standard. Intrinsically safe with ATEX, IECEx and CSA certifications, the GP-03 provides affordable, reliable combustible gas protection without bulk or compromise.
KEY BENEFITS
- Pocket-sized personal combustible gas monitor at just 80 grams
- Up to 35 hours continuous operation on alkaline batteries, or 30 hours on Ni-MH rechargeable
- Audible, visual and vibration alarms as standard
- Peak Hold, STEL and TWA monitoring included
- Data logging from 5 hours to 300 hours with adjustable intervals
+ more in the Description tab below
Small Enough to Forget You’re Wearing It. Reliable Enough to Trust With Your Life.
Personal gas protection in hazardous areas should not require workers to carry bulky, expensive equipment. The GP-03 was designed with that in mind. At just 80 grams and pocket-sized at 54 x 67 x 24 mm, it is one of the smallest and lightest combustible gas monitors available, providing genuine personal protection without getting in the way of the work.
The GP-03 uses a catalytic combustion sensor to continuously monitor for combustible hydrocarbons across a 0 to 100% LEL range. Two preset alarm set points, factory set at 10% LEL and 50% LEL, are fully user-adjustable to suit site-specific requirements. An OVER alarm triggers at 100% LEL, and all alarm events are communicated through a combination of flashing LEDs, an intermittent buzzer and vibration, ensuring the warning is received even in noisy environments or when the instrument is in a pocket.
Long Runtime, Low Maintenance
The GP-03 operates for up to 35 hours on two standard AAA alkaline batteries, or 30 hours on rechargeable Ni-MH cells. The replaceable LEL sensor has a life expectancy of over 2 years and is interchangeable with sensors used in RKI’s GX-2009 and GX-2012 instruments, keeping fleet management and spare parts stocking straightforward. The sensor is field-replaceable without tools.
Data Logging and Compliance
The GP-03 logs gas readings, alarm events, alarm trends, calibration and bump test history, and instrument settings. The logging interval is adjustable from 10 seconds to 10 minutes, providing between 5 and 300 hours of data storage depending on the interval selected. Data can be downloaded to a PC using the included data logging software for compliance reporting and incident investigation.
Built for Hazardous Locations
The GP-03 is impact, dust and water resistant with an IP67 rating, and is classified as intrinsically safe by ATEX, IECEx and CSA for Class I, Division 1, Groups A, B, C and D atmospheres. The replaceable rubber protective boot provides additional impact protection in demanding environments.
Benefits
- Pocket-sized personal combustible gas monitor at just 80 grams
- Up to 35 hours continuous operation on alkaline batteries, or 30 hours on Ni-MH rechargeable
- Audible, visual and vibration alarms as standard
- Peak Hold, STEL and TWA monitoring included
- Data logging from 5 hours to 300 hours with adjustable intervals
- User-adjustable alarm set points
- Inexpensive field-replaceable LEL sensor with 2-year life expectancy
- Sensor interchangeable with RKI GX-2009 and GX-2012 instruments
- IP67 rated for dust and water resistance
- Intrinsically safe — ATEX, IECEx and CSA certified for Class I, Division 1 hazardous locations
Dimensions
54 x 67 x 24 mm
Weight
80 g
Detection principle
Catalytic combustion
Detection range
0 to 100% LEL, 1% LEL increments
Response time
T90 in 30 seconds
Accuracy
±5% of reading or ±2% LEL, whichever is greater
Alarm set points
1st: 10% LEL (user adjustable). 2nd: 50% LEL (user adjustable). OVER: 100% LEL
Alarm types
Gas alarms: 1st, 2nd, OVER, STEL and TWA. Trouble alarms: sensor connection, low battery, circuit failure, calibration range error
Alarm methods
Flashing LEDs, intermittent buzzer, flashing gas value, vibration
Sampling
Diffusion
Battery
2x AAA alkaline or 2x AAA Ni-MH rechargeable
Battery runtime
35 hours (alkaline), 30 hours (Ni-MH)
Display
Digital LCD, gas name and concentration, auto backlight during alarm, battery icon, operation icon
Data logging
10-second intervals: 5 hours. 5-minute intervals: 150 hours. 10-minute intervals: 300 hours
Peak Hold
Yes
STEL and TWA
Yes
Operating temperature
-20°C to 50°C
Humidity
Below 90% RH non-condensing
IP rating
IP67
Safety rating
ATEX and IECEx intrinsically safe. CSA classified C/US, Class I, Division 1, Groups A, B, C and D
Sensor life
Over 2 years
Warranty
2 years
Combustible Gas
LEL
- Aviation & Transportation
- Chemical Manufacturing
- Confined Space & Compliance
- Energy (Oil & Gas)
- Landfill & Remediation
- Mining & Minerals
- Power Generation & BESS
- Water & Wastewater
The GP-03 monitors combustible gases in %LEL. The same 03 Series platform is available in CO, H2S and O2 configurations as the CO-03, HS-03 and OX-03 models. Contact Gastech to confirm which model suits your application.
The GP-03 operates for up to 35 hours on two standard AAA alkaline batteries. Using rechargeable Ni-MH cells provides approximately 30 hours of operation.
Yes. The LEL sensor is inexpensive and easily field-replaceable without tools, with a life expectancy of over 2 years. The sensor is also interchangeable with RKI GX-2009 and GX-2012 instruments.
Yes. The GP-03 is certified as intrinsically safe under ATEX and IECEx, and is CSA classified for Class I, Division 1, Groups A, B, C and D atmospheres.
Yes. Both the 1st and 2nd alarm set points are user-adjustable. The OVER alarm at 100% LEL is fixed.
Yes. The GP-03 logs gas readings, alarm events, calibration and bump test history and instrument settings. Logging intervals are adjustable from 10 seconds to 10 minutes, providing between 5 and 300 hours of data storage. Data is downloaded to a PC using the included software.
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