Extrima® Ex-certified Hydrogen Leak Detector

The portable Extrima Leak Detector is the ultimate intrinsically safe instrument for leak detection in the toughest environments, including hazardous locations such as Zone 0 (corresponding to Division 1).


The Extrima allows you to quickly find leaks on a wide range of industrial applications such as aircraft and hydrogen cooled generators. With the Extrima the aviation industry has a safe, accurate and yet simple solution for leak testing of complete fuel systems, both in production and maintenance situations. Thanks to its high sensitivity, the Extrima can detect even minute leaks with pinpoint accuracy. Extensive tests have shown that using the Extrima can reduce the average time by more than 50 % for identifying, locating and repairing a leak on a fighter jet during maintenance.

It is certified for use in Zone 0, classification Ex ia, IIC T3 with ATEX, IECEx, NEPSI and CSA certificates. The Extrima can be used to trace leaks using Forming gas (5% H2/95% N2) or in applications where pure hydrogen is used.


• Allows entry into explosive environments without prior venting
• Up to 12 hours battery capacity
• Extremely robust and resilient to hydraulic fluids and fuels
• High sensitivity, quick reaction, fast recovery
• Easy to use and maintain
• Can be used in wet conditions
• Several accessories for aircraft fuel system leak detection


• Intrinsically safe: Ex ia, IIC T3 for use in Zone 0/Division 1
• High sensitivity 0.5 ppm/1x10E-7 cc/s using 5% H2/95% N2
Waterproof: IP 67
• 1 minute start up time
• Unique selectivity to hydrogen

Typical Applications

• Aerospace – complete fuel systems, oxygen supply, cooling systems and fire extinguishing systems, both in production and maintenance
• Power production – hydrogen-cooled generators and fuel cells
• Process industry – e.g., pipe systems, valves and containers
• Petro chemical industry

Type Extrima Ex-certified Hydrogen Leak Detector

Minimum detectable leak rate

Measuring mode 0.5 ppm – 0.2% H2
Locating mode 1 x 10-7 cc/s (using 5 % H2 tracer gas)
Ex classification Ex ia IIC T3
Ambient temperature range -20 to +50°C (-4 to +120°F)
Humidity 95% RH (non-condensing)
Chemical resistance JET-fuel and most common petroleum products
IP-Class IP67, 30 min@1m (IEC 60529)
Application (mines and dust excluded) Zones 0, 1 and 2 / Division 1 and 2 (hydrogen, JET-fuel, and other T1, T2 and T3 gases)
Battery Capacity – full charge, screen saver activated Up to 12 h at >15°C (59°F)
Battery Capacity – full charge, without screen saver activated Up to 7 h at >15°C (59°F)
Dimensions (W x H x D) 128 x 240 x 167 mm (5.03 x 9.44 x 6.57 in.)
Weight (excl. probe and probe cable) 4.5 kg (10.0 lb.)
Part Number Description
590-600 Extrima, Ex-certified Hydrogen Leak Detector
Part Number Description
590-606 Hand Probe PX57 (rigid neck)
590-607 Hand Probe PX57 Flex (flexible neck)
590-618 Injection Fix Kit, for injecting tracer gas to leaks on uneven surfaces
590-619 Injection Panel, for easy gas injection from bottle to Injection Pad
590-621 Complete Gas Injection Kit (incl. Injection Panel, Injection Fix Kit and Injection Pads)
590-420 Calibration Leak Type A, 5x10E-2 mbarl/s @1bar
590-421 Calibration Leak Type B, 5x10E-3 mbarl/s @1bar
590-422 Calibration Leak Type C, 5x10E-4 mbarl/s @1bar
590-427 Calibration Leak Type E, 10g/a
590-429 Calibration Leak Type G, 3g/a
Part Number Description
590-615 Injection Pads Small, 60 mm, 10 pcs (for filling tracer gas into fuel tanks)
590-616 Injection Pads Large, 150 mm, 10 pcs (for filling tracer gas into fuel tanks)
590-270 Antistatic Sensor Caps (50 pcs) for Hand Probe
590-292 Replacement Hydrogen Sensor for Hand Probe P60, P60 Flex, P50, P50 Flex, PX57, PX50 Flex,PK50 and PK50 Flex
591-038 Water Protective Tape, for waterprotecting the sensor
Part Number Description
590-260 CX21 Probe Cable, 9.8 ft (3m) for Hand Probe PX57. PX57 Flex, PX50 and PX50 Flex
590-265 CX21 Probe Cable,16.4 ft (5m) for Hand Probe PX57. PX57 Flex, PX50 and PX50 Flex
591-656 Ex-classified Battery Charger for Extrima Hydrogen Leak Detector
598-147 Sensor Key (for Hand Probe P60, P60 Flex, P50, P50 Flex, PX50 and PX50 Flex)
591-687 Shoulder Strap, for Extrima
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