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).
Extrima allows you to quickly detect leaks across a wide range of industrial systems where pure hydrogen is used—such as hydrogen systems, hydrogen-cooled generators, fueling stations, and fuel systems—without compromising safety. It can also be used on components like valves, regulators, and pressure gauges, where a non-flammable gas mixture of 5% hydrogen in nitrogen is used as a tracer gas. The unit is specifically designed to meet the rigorous requirements of the energy sector where hydrogen is used in production, storage, distribution, and consumption. Thanks to its high sensitivity, Extrima can detect even minute leaks with pinpoint accuracy.
It is certified for use in Zone 0, classification Ex ia IIC T3, with ATEX, IECEx, TIIS, NEPSI, and CSA certificates.
Features
- Intrinsically safe: Ex ia IIC T3
- High sensitivity: 0.5 ppm / 2.5 E-8 mbar·L/s
- Waterproof: IP 67
- 1-minute start-up time
- Unique selectivity to hydrogen
Advantages
- Intrinsically safe for use in hazardous areas (Ex ia IIC T3)
- Robust enclosure for demanding field use
- High sensitivity and fast recovery allow for efficient operation
- Finds leaks in high-hydrogen backgrounds
- Portable, battery operated (more than 8 hours of use per charge)
- Low cost of ownership
- Incorporates the proven Sensistor® technology
Typical Applications
- Power production: hydrogen-cooled generators and fuel cells
- Process industry: pipe systems, valves, and containers
- Petro chemical industry
- Aerospace: complete fuel systems, oxygen supply, cooling systems, and fire extinguishing systems, both in production and maintenance
Specifications
| Minimum detectable leak rate | |
| Measuring mode | 0.5 ppm - 0.2% H2 |
| Locating mode | 2.5E-8 mbar·L/s |
| Ex classification | Ex ia IIC T3 |
| Battery capacity | Up to 8 h at >15°C (59°F) |
| Weight (excluding probe and probe cable) | 4.5 kg (10.0 lb.) |
Part Number
| Part Number | Description |
| 590-600 | Extrima |
| Part Number | Description |
| 590-606 | Hand Probe PX57 (rigid neck) |
| 590-607 | Hand Probe PX57 Flex (flexible neck) |
| 590-421 | Calibration Leak Type B, 5E-3 mbar·L/s @ 1 bar |
| 590-422 | Calibration Leak Type C, 5E-4 mbar·L/s @ 1 bar |
| 12344 | Calibration Leak, 5.2E-5 (5% H2/95% N2) equal to 10 g/year (R134a) |
| 599-116 | Diffusor house (for calibration leak 12344) |
| 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) |
| 590-618 | Injection Fix Kit, for injecting tracer gas to leaks on uneven surfaces |
| 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 waterproofing the sensor |
| Part Number | Description |
| 590-260 | CX21 Probe Cable, 9.8 ft. (3 m) 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 | Battery Charger (includes P/N 592-101 and P/N 592-102) |
| 592-101 | Charging Adapter |
| 592-102 | Power Supply |
| 598-147 | Sensor Key (for Hand Probe P60, P60 Flex, P50, P50 Flex, PX50, and PX50 Flex) |
| 591-687 | Shoulder Strap |
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