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NHJ400 Series Helium Hydrogen Mass Spectrometer Leak Detector

Performance description

NHJ-400 series leak detector is a fully automatic mobile helium mass spectrum leak detector, mute wheel design, suitable for many harsh vacuum industry.

*Using helium mass spectrometry and inverse diffusion principle, using 180° inhomogeneous magnetic field and automatic control technology. Automatic helum peak scanning, automatic calibration and automatic range switching are realized.
*lt has the characteristics of short start time, fast operation speed, high detection sensitvity and strong anti-interference ability.

NHJ400 Series Helium Hydrogen Mass Spectrometer Leak Detector

Performance characteristics

*Unique gas path design, can avoid dust into the instrument interior
*Multi-mode function input, output, easy to connect a variety of automation equipment
*Double iridium ion source,strong antioxidant capacity and long service life
*The machine is effectively separated from the circut, avoiding the interference of temperature, electromagnetic field and so on.which makes the leak detector run more stable and reliable
use mobile phone APP remote over-control leak detector to start, stop, zero. Real-time monitoring leak detectorshows leakage

NHJ400 Series Helium Hydrogen Mass Spectrometer Leak Detector

Technical parameter

Vacuum minimum leak detection rate	3×10-13 Pa · m3/s
Vacuum leakage rate display range	1×10-1 ~ 1×10-13Pa · m3/s
Minimum leak detection rate for suction gun	5×10-9Pa ·m3/s
Range of leakage rate of suction gun	1×10-1 ~ 1×10-9 Pa· m3/s (zero )
Detectable masses	He4,H2
Start time	≤100 s
Response time	≤0.3S
Leak Pressure	≤2000 Pa
Mainframe Power / voltage	100-120V,6OHz/200-240V,50Hz
work environment	Temperature: 5-40 ℃ Humidity: ≤ 75%
Language	Chinese/English
Size	6203701027 mm
weight	110 Kg
Display units	Pa · m3/s . mbar-l/s,atm – cc/s,Torr·L/s,ppm

Configuration table

	NHJ-400P	NHJ-400L
Vacuum pump	Super power double-stage rotary vane mechanical pump
Molecular pump	Germany Pufa	Leibao, Germany
Vacuum valve	Customized leak detector imported from Germany
Display screen	?	?
WIFI	0	0
Cart	?	?
Remote controler	0	0
Suction gun	0	0
Big leak detection	?	?
Large leakage protection	?	?
Molecular pump Temperature alarm	0	0
vacuum pump Temperature alarm	0	0
External leak	?	?
Built-in leak	0	0
Data saving	?	?
Auto-zero	?	?
Display interface	Graph, histogram, numerical display
I/o interfaces	RS232,RS485,USB External control input/output, analog output interface
Optional :0	Standard Accessories: ?

Leak Detection

Negative pressure method

*Vacuum the sealed chamber inside the inspected product
*Apply helium gas on the outer surface of the product under inspection
*Leak detector detects changes in helium content inside the workpiece
*The precise location of the leak can be realized

Positive pressure method

*The sealed chamber is filled with helium under certain pressure
*When a leak occurs,helium leaks through the leak through the surrounding atmosphere
*Detection of helium concentration increments in surrounding atmosphere by suctionmethod The precise location of the leak can be realized

Back pressure method

Place the inspected product in a pressurized helium chamber for a certain period of time
Remove the residual helium from the surface
Put the inspected product into the leak detector connected with the leak detector;
Take the maximum leakage rate for a certain time

Leak Detection

Negative pressure method

Vacuum the sealed chamber inside the inspected product Apply helium gas on the outer surface of the product under inspection Leak detector detects changes in helium content inside the workpiece The precise location of the leak can be realized.

Positive pressure method

The sealed chamber is filled with helium under certain pressure.

When a leak occurs, helium leaks through the leak through the surrounding atmosphere .

Detection of helium concentration increments in surrounding atmosphere by suction method The precise location of the leak can be realized.

NHJ600 Series Helium Hydrogen Mass Spectrometer Leak Detector Vacuum helium leak detection analyzer

Back pressure method

Place the inspected product in a pressurized helium chamber for a certain period of time Remove the residual helium from the surface Put the inspected product into the leak detector connected with the leak detector;Take the maximum leakage rate for a certain time.

NHJ600 Series Helium Hydrogen Mass Spectrometer Leak Detector Vacuum helium leak detection analyzer