Hot Ionization Gauges

Trigon™ BCG552

ATM to Ultra High Vacuum TripleGauge®

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Gemini™ MxG5xx

Sensor version
Ionization chamber
Emmision current
Flange connection to vacuum chamber
Switching function
Electrical connection
Digital interface
Analog output signal
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Gemini™ MxG5xx
Switching functions
Electrical Connection
FCC, 8-pin
Digital Interface
Measurement range
1.2 - 8.68 V
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Gemini™ MxG5xx
Gemini™ MAG500
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The TripleGauge® BCG552 combines 3 vacuum sensing elements in one sensor flange. This flagship of the new TrigonTM family offers a extremely wide measurement range from UHV (5 x10-10) up to ATM (1500 mbar). With its added ATM sensor, BCG552 is well-suited for differential pressure measurement and for use as vacuum switch in several applications.

The supported Bayard-Alpert dual filament offers superior accuracy, repeatability and longevity in the UHV and HV range, while the miniaturized capacitance diaphragm gauge has superior accuracy in the ATM range and is gas type independent.


  • 3 + 1 sensing elements for extremely wide measurement range, cost reduction & space savings
  • 2 filaments for Bayard-Alpert system 
  • Gas type independent pressure measurement above 10 Torr provides more reliable load lock control for any gas mixtures
  • Differential pressure measurement eliminates uncertainty related to atmospheric pressure changes 
  • Automatic high vacuum Pirani adjustment reduces operator interventions 
  • Galvanic isolated electronics to avoid electric stray current 
  • Sliding emission mode to avoid pressure jumps and freeze when switching the emission stream 
  • Set point relays 
  • Bright & big OLED display (90° rotatable) with user interface 
  • Analog output, RS232C serial interface, EtherCAT® 
  • Usable in conjunction with VGC50x Controller series 
  • Backwards compatible to TripleGauge® BCG450 
  • RoHS compliance

Typical applications

  • Pressure measurement in Semiconductor processes, transfer and loadlock chambers
  • Industrial coating
  • General vacuum measurement and control on systems in the low to ultra high vacuum range


Measurement range (air, O2, CO, N2)5 × 10-10 … 1500 mbar
950 ... 1050 mbar±2.5% of reading
50 ... 950 mbar±5% of reading
1 × 10-8 … 50 mbar±15 of reading
Repeatability5% of reading, 1 × 10-8 … 1050 mbar (after 10 min. stabilization)
Materials exposed to vacuumstainless steel, NiFe, nickel plating, Hastelloy, glass, iridium, yttrium oxide (Y2O3), Ni, tungsten

Part Number

BCG552 Ordering Information
BCG552 Ordering Information

Spare Parts

Part NumberDescription
354-423BCG552 Spare sensor head, KF25
354-424BCG552 Spare sensor head, CF40
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