NH 400 Wet Helium Leak Detector

NH 400, One of the Best Helium Leak Detectors from China

Smallest Detectable Leak Rate: 3×10-13 Pa · m3/s

Equipped with Pfeiffer/Leybold/Inficon


NH 400, one of the best leak detectors from China, represents a state-of-the-art, fully automated mobile helium mass spectrometer system designed to meet the stringent requirements of a diverse range of industries.


  • Distinctive gas path design ensures that no dust infiltrates the instrument.

  • Versatile multi-mode input and output functionality facilitates seamless integration with a wide range of automation equipment.

  • Equipped with a dual iridium filament ion source, offering exceptional oxidation resistance and an extended operational lifespan.

  • Effective segregation of mechanical and electrical components prevents mutual interference from temperature and electromagnetic fields, resulting in a leak detector that operates with heightened stability and reliability.

  • Remote Control Capabilities: Through a dedicated mobile app, users have the ability to remotely initiate, halt, and zero the leak detector. Additionally, real-time leak rate monitoring is conveniently accessible.

Technical Data:

Smallest Detectable Leak Rate (Vacuum)

3×10^-13 Pa · m3/s

Leak Rate Display Range (Vacuum)

1×10-1 ~ 1×10^-13 Pa · m3/s

Smallest Detectable Leak Rate (Sniffer Gun)

5×10^-9 Pa · m3/s

Leak Rate Display Range (Sniffer Gun)

1×10-1 ~ 1×10^-9 Pa · m3/s

Detectable Gases

He4, He3, H2

Startup Time

≤100 s

Response Time

≤0.3 s

Leak Pressure

≤2000 Pa

Power Supply

1000 W, 100-120V/60Hz/200-240V/50Hz

Work Environment

Temperature: 5-40°C, Humidity: ≤80%


620x370x1027 mm


110 kg

Display Units

Pa · m3/s, mbar · l/s, atm · cc/s, Torr · l/s, ppm


Molecular Pump

Pfeiffer/Leybold (Germany)

Oil-Sealed Mechanical Pump

Leybold (Germany)

Solenoid Valve

Burkert (Germany)

Vacuum Gauge


Display Screen 7“





Remote Controller (150 m)

Sniffer Gun

Large Leak Detection


Large Leak Protection


Molecular Pump Temperature Alarm

Mechanical Pump Temperature Alarm

External Leak


Internal Leak

Data Saving




I/O Interfaces

RS232, RS485, USB

⦿ Standard  ⦾ Optional

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