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HELIOT 900 Series

Leak Detector
HELIOT 900 Series

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The HELIOT900 is our helium leak detector with; high speed pumping capability, user-friendly operation and guaranteed top performance in all kinds of leak testing situations.

“Feature story : Development of Leak Detector“ HELIOT 900 Series”

“Announcement on Problem of Our Calibrated Leaks During Air Transportation”


  • High speed pumping capability:
    5L/s pumping speed for helium IN ULTRA flow mode.
  • Tablet type controller:
    Wireless remote control is standard specification.
  • Intuitive operation:
    Simple with high-definition and eye-friendly test screen.
  • Various backing pumps available:
    Oil rotary vane and dry scroll pumps in different sizes.
  • Mobile-friendly with maneuverable cart (HELIOT904_):
    Low height type is also available (HELIOT901_).
  • Ease of maintenance:
    Tool-free removal maintenance panel, easy internal access for maintenance and maintenance instructions built in.
  • Possible to detect hydrogen as well as helium gas by vacuum method.


  • Piping assemblies and separate parts.
  • Vacuum components and systems.
  • Automotive parts, air conditioning, heat exchanger parts and assemblies.
  • Packaging for food, pharmaceuticals, etc.
  • Flow and permeation rate measurement of helium and hydrogen.


901W1 901D2 904W2 904D3 904D4
Type Base type Mobile type
Detectable gas 4He, 2H2
Minimum detectable leak rate
<5E-13 Pa・m3/sec | <5E-12 mbar・L/sec | <3.75E-12 Torr・L/sec
Leak rate display range 4He 0.01E-12 to E-3 Pa・m3/sec | 0.01E-11 to E-2 mbar・L/sec | 0.01E-11 to E-2 Torr・L/sec
2H2 0.01E-8 to E-5 Pa・m3/sec | 0.01E-7 to E-4 mbar・L/sec | 0.01E- 7 to E-4 Torr・L/sec
Inlet pumping speed for(4He) 5 L/sec
Max. connecting pressure < 1200 Pa | < 12 mbar | < 9 Torr
Main pump Pumping peed Turbo molecular pump
31 L/sec
Fore pump
Pumping speed (50Hz/60Hz)
Oil rotary pump
30/36 L/min | 1.8/2.2 m3/h | 1.1/1.3 cfm
Dry scroll pump
90/108 L/min | 5.4/6.5 m3/h | 3.2/3.8 cfm
Oil rotary pump
135/162 L/min | 8.1/9.7 m3/h | 4.8/5.7 cfm
Dry scroll pump
250/300 L/min | 15/18 m3/h | 8.8/10.6 cfm
Dry scroll pump
500/600 L/min | 30/36 m3/h | 17.6/21.2 cfm
Weight (including floor cart) Approx. 33 kg (Approx. 46 kg) Approx. 37 kg (Approx. 50 kg) Approx. 79 kg Approx. 74 kg Approx. 96 kg
Power consumption 600 VA 500 VA 1100 VA 650 VA 1150 VA
Input power supply 100-120 V or 200-240 V
Inlet port flange NW25(ISO)
Startup time < 2 min
External interface RS232C, RS485, analog DC, digital I/O.
Language English,Japanese,Korean,Simple Chinese,Traditional Chinese,German,Spanish,Russian
Controller unit 7inch tablet type (wireless standard: IEEE 802.11 b/g/n) (*1)
Operation range Wired Cable length : 2m (standard), 5m (optional)
Wireless 40m (*2)
Battery lasting time 3-5 hrs (*3)
Applicable standard CE, IP30 CE
*1 Applicable radio law. Tablet: Telec, CE, FCC. Main unit: Telec, CE, FCC, IC, C-TICK. “Wired operation spec” that doesn’t emit radio waves is also available (tablet controller has wireless radio on/off function).
*2 May change depending on operating environment.
*3 May change depending on communication condition, brightness, volume, etc.


[Sniffer Method]

Detectable gas 4He
Minimum leak rate display range 0.01E- 8 to E-5 Pa・m3/sec | 0.01E-7 to E-4 mbar・L/sec | 0.01E-7 to E-4 Torr・L/sec 0.01E-7 to E-3 Pa・m3/sec | 0.01E-6 to E-2 mbar・L/sec | 0.01E-6 to E-2 Torr・L/sec
Flow rate < 0.03 slm Approx. 3 slm
Sniffing inlet port Handy probe φ6mm tube fitting
Tube 1-10 m (*1)
*1 Specified length per 1m.


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