Probe Method

Auf die Merkliste please click this symbol to add articles to your wishlist
Helium Leak Detector


  • High sensitivity
  • Very handy
  • Ergonomically friendly

The helium leak detector PHD-4  operates as Selective Ion Pump Detector (SIPD).

Helium penetrates through a special membrane heated to a specific temperature that allows helium atoms to pass. These are ionised by an ion converter. The detector registers the ion current thus produced and emits a signal whose height is proportional to the He amount detected. The signal amplitude indicates the leak size.

Technical Data  
Minimum detectable helium concentration     
Minimum detectable leakage rate
Response time 
Warming period incl. self-test
Operation voltage
Continuous operation period
2 ppm
5 x 10-7 Pa m3/s
2 s
3 min
18 V (Akku)
4 h
170 x 136 x 290 mm
2.6 kg

auf die Merkliste  613.000.020  Helium leak indicator  PHD-4
auf die Merkliste  613.000.002  Capillary leak  
auf die Merkliste  613.000.003  Probe pinheads  
auf die Merkliste  613.000.004  Long probe  
auf die Merkliste  613.000.013  Probe extension  

Welcome! - Helling GmbH