G300 Series
Portable Leak Detector
§  Small, light, and durable leak detector
§  For combustible gases and ammonia
§  More than 8 hours of continuous operation
§  Explosion-proof models available
Light, compact and durable
Designed for one-handed operation, the G300 reacts to concentrations as small as 5 ppm and
measures up to more than 10,000 ppm or 1% volume. The sensor is located at the end of a flexible
gooseneck or a helix cable to allow the user to reach difficult or unreachable locations. The
G300 is available with or without explosion protection for ammonia and combustible gases. The
G311 operates on four “AA” alkaline batteries. All others have a rechargeable battery with run
times of more than eight hours.
Technical Data
G300 II, G300 II TOX
Gases	Ammonia (NH3)
	Methane (CH4) (natural gas)
	(Other gases on request)
Detection range	CH4   (0)5-10,000 ppm
	NH3   (0)5-1,000 ppm
Detection principle	Chemosorption
Gas supply	Diffusion
Response time	Less than 3 seconds
Temperature range	-4 to +122°F/ -20 to +50°C
Humidity range	20 to 99% r.h., non-condensing
Sensor life	Approximately 5 to 10 years
Power supply	G300 II	Rechargeable battery pack
	G300 III	Alkaline AA batteries
Operational time	Greater than 8 hours continuous operation
Casing	Polyamide – IP 53
Ordering information
Explosion-proof	G300 II CH4		1316012
	G300 II NH3		1316014
Non-explosion-proof	G300 II type G 311- CH4		1316009
	G300 II type G 313- CH4		1316002
	G300 II type G 315- NH3		1316004
Weight	12.25 ounces (350 grams)
Dimensions	4.7 x 2.4 x 1.4 inches (120 x 60 x 35 mm) (H x W x D)
Certification and approvals (intrinsic safety)	ATEX EEX s IIC T6