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|Type:||Oil Free||Smallest Detectable:||5×10-13 Pa•m3/s|
|Display:||10-13～10-1 Pa•m3/s||Response Time:||No More Than 0.3 Sec|
helium mass spectrometer,
helium vacuum leak detector
Helium Leak Detector , ZQJ-3000G , oil free , Min Rate 5E-13
With nearly 50 years of vacuum leak detection technology experience, KYKY is the largest R&D and production base of HLD and has the independent intellectual property rights for vacuum leak detection system. The leak detectors and leak detection systems developed by KYKY provide advanced and effective leak detection solutions to aerospace, power electronics, air conditioning refrigeration, chemical metallurgy, medical equipment, semiconductor production and many other applications to meet the demands in various fields.
The ZQJ-3000 Helium Leak Detectors are microprocessor-controller leak detecting instruments. All the processes in the instrument are controlled automatically.
The measuring system consists (simplified) of:
a test connection
a backing pump
a turbo pump
a few valves
a helium sensor
When searching for leaks with the ZQJ-3000 the test gas entering or escaping through leaks in the sample is detected.
For gas to flow through a leak a pressure difference between the inside and outside of the sample is necessary. For this either excess pressure or vacuum pressure is generated inside the sample.
In the vacuum method test gas is blown against the wall of the evacuated sample from the atmosphere side. It enters the sample at leaks and is fed to the leak detector.
The sample must be vacuum pressure-proof.
The sensitivity stages GROSS ---FINE---ULTRA are run through.
The detection limit is lower than in the sniffing method. The helium concentration at the leak must be known in order to quantify the leak. The state of equilibrium must be waited for.
In the sniffing method the test gas escaping from leaks in the sample into the atmosphere is detected.
The sample must withstand the applied test pressure.
In operation with the sniffing probe a constant gas flow is sucked in from the atmosphere. The helium proportion of the air (5.2 ppm) causes a leak rate display of approx. 1*10-6 mbar l/s which can be eliminated by the ZERO function.20 3 Description Operating Instructions, ikna88en1-01, 1605
To detect a leak, the sniffing probe is applied to the points of the sample under helium overpressure which are suspected of leaking. An increased leak rate value indicates an increased concentration of helium and therefore a leak. The higher the pressure and the helium concentration in the sample, the smaller the leaks which can be detected.
The sensitivity stages GROSS---FINE are run through.
The detection sensitivity and the quantifiability of the leak rate are less favourable than in the vacuum pressure leak detection.
1. Easy operation( small volume, light weight, compact structure, simple operation panel),
2. Multiful interface( Rs232/485, Digital I/O, remote controller interface, External gauge interface),
3. Powerful functions. (Various test mode, capability of detecting H2. 3He, amd 4He, multiple menu setting)
4. Reliable performance(high sensitivity, wide measurement range, high inlet pressure, fast response time)
5. Reliable quality (prolong the service life, resistance of yttrium oxide iridium filament)
|Smallest Detectable Leak Rate(Pa•m3/s)||5×10-13|
|Leak Rate Display(Pa•m3/s)||10-13～10-1|
|Maximum Inlet Pressure(Pa)||1800|
|Power||230 VAC±10%/50 Hz|
|Working Temperature and Relative humidity||Working Temperature 10~35℃,realtive humidity ≤80%|
Contact Person: sales