***NEW***T-Guard2 Leak Detection Sensor


INFICON T-Guard2 Leak Detection Sensor closes the gap between costly hard vacuum helium leak detection and low sensitivity leak testing methods like waterbath and pressure decay.

T-Guard2 works at atmospheric pressure, therefore there is no need for vacuum chambers and pumps.

There is no faster and more cost-effective way of repeatable leak testing in the measurement range of T-Guard2.



  • Low operating cost

    • The INFICON Wise Technology Helium sensor does not need a vacuum, turbo-pump, or maintenance. This lowers your operating costs and assure high uptimes.
  • No limitation of product properties

    • Even large, warm or humid objects, and those can not be well operated under vacuum can be leak tested
  • Find all leaks reliably

    • With INFICON Wise Technology leaks down to 1x10-6 mbar·l/s can be detected reliably
  • Easy to use

    • The intelligent Software and optional display units supply easy operation through an intuitive menu structure
  • Fexible Control

    • INFICON T-Guard2 allows a wide range of control options. You can choose between PLC, PC or optional display and Profibus.

Typical Applications

  • Leak detection for air conditioner components

  • Leak detection for components for the automotive industry
  • Leak detection for large, warm or humid components

  • Leak detection for all components where pressure decay and water bath systems can not provide sufficient sensitivity

  • Other markets where helium vacuum leak detection has been considered as too costly or complex


Type T-Guard2 Leak Detection Sensor
Minimum detectable leak rate mbar•L/s 1E-6
Measurement range decades 5
Test chamber pressure Atm 1
Operation modes 2 automatic, 1 advanced
Maximum carrier gas flow sccm 1.000.000
Probe gas flow FINE/GROSS sccm 180 / 90
Time constant of the leak rate signal s <1
Run up time min <3
Control inputs SPS compatible (max.35V)
Status / Trigger outputs 8 x relaiscontacts (max. 60V DC / 25V AC / 1A)
recorder output lin/log 0 - 10V
Recommended fore pump Membranepump, two-stage
Power supply demand V (dc) 24
Typical power consumption Watt 100
Hose connectors 6
Type of protection IP20
Dimensions 272 x 130 x 272
Weight 6,8

Part Number

T-Guard2 Leak Detection Sensor
Part Number Description
540-200 WISE Technology T-Guard2 Sensor
540-201 WISE Technology T-Guard2 Sensor Profibus


T-Guard2 Leak Detection Sensor
Part Number Description
551-100 Control unit, desktop version
551-101 Display unit, rack installation
551-102 Cable 5 m for 551–100
551-103 Connecting cable, ext. Control unit, 0.7
Sensistor ILS500 F Leak Detection Filler 590-571 Sensistor ILS500 F Leak Detection Filler
Sensistor ILS500 F-HP Leak Detection Filler, high pressure model 590-573 Sensistor ILS500 F-HP Leak Detection Filler, high pressure model
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