Agilent Series 342 Mini-Ionization Gauge Tube for MS Detector

The Granville-Phillips Series 342 triode-style mini-ionization gauge tube is a premium, high-vacuum measurement solution designed for precision analytical laboratory environments. This specialized hot-filament ion gauge tube offers an incredibly compact footprint without sacrificing performance, making it the industry-standard choice for internal instrumentation configurations.

Engineered with rugged thoria-coated iridium filaments, the Series 342 is designed to withstand accidental atmospheric exposure at normal operating temperatures without damage, ensuring excellent operational longevity and reducing system downtime. It serves as a direct replacement component for high-performance mass spectrometers and gas analysis equipment.

Key Benefits & Applications:

Direct Instrument Integration: Perfectly optimized for seamless drop-in compatibility with legacy Agilent/HP systems (5971, 5972, 5973, 5975) and a wide array of Thermo Scientific mass spectrometers, including the LTQ, LCQ, Orbitrap, Exactive, and Velos series.

Ultra-Compact Glass Envelope: Compact footprint tailored explicitly for space-restricted analytical equipment and high-vacuum manifold assemblies.

Robust Filament Design: Utilizes high-end thoria-coated iridium filaments that offer exceptional resistance to burnout and atmospheric accidents.

Technical Specifications:

Gauge Architecture: Triode-Style Hot Cathode Ionization

Measurement Range: <5 × 10⁻⁷ to 5 × 10⁻² Torr (Air / N₂)

Measurement Accuracy: ± 15% typical

Nominal Sensitivity: 6.2 / Torr

Filament Composition: Thoria-Coated Iridium

Filament Operating Voltage: 1.5 to 3.5 VDC

Filament Operating Current: 1.75 to 2.25 A

Grid Voltage Range: 120 to 250 VDC

Collector Voltage Range: -20 to -50 VDC

Emission Current Settings: Dual range: 0.1 mA / 2 mA

Operating Temperature: 0°C to 50°C, non-condensing

Standard Mounting Fitting: 0.75-inch Kovar tubulation or NW16KF Flange

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