Master 400

Description

The Master 400 is a high-resolution, desktop-sized quadrupole mass spectrometer developed by AMI Instruments (launched in 2022). It is intended for fast, accurate analyses of gas-phase components — either online (real-time) or offline — in a variety of systems such as chemisorption analyzers, microreactors, breakthrough curve analyzers, or thermal analyzers (TGA/STA).

Key Features

• A temperature-controlled inlet pipeline to avoid condensation of gases during sampling.

• A bakeable mass-spectrometry chamber (heatable to ~200 °C) to reduce background gases and improve signal quality.

• Dual detectors (Faraday cup + electron multiplier) enabling a broad dynamic range from full concentration down to parts-per-billion sensitivity.

• Rapid scanning and response (scan times as fast as ~1 ms per amu) for fast kinetics or transient monitoring.

• A customizable sampling system with options for multichannel detection, automatic control and integration with other instruments.

• A vacuum system combining a turbomolecular pump and an oil-free diaphragm (dry) pump, with full-range pressure monitoring and baking capabilities.

Typical Specifications

• Mass range: 1-100 amu (optional up to 200 or 300 amu)

• Detection limit: better than ~500 ppb

• Scan rate: ~1 ms to 16 s per amu

• Sampling rate: ~0.5 bar to ~1.5 bar input pressure (standard)

• Maximum heating temperature for sample tube: ~200 °C

• Maximum chamber bake temperature: ~200 °C

• Filament material: Iridium

• Detectors: Faraday cup + SEM (electron multiplier)

• Interface: Ethernet (TCP/IP) for integration and automation

Applications

• Coupling with chemisorption analyzers: to monitor gas streams (e.g., during TPD, TPR, TPO) in real time and intervene in reaction pathways or catalyst behavior.

• Integration with reactor systems: enabling real-time gas composition analysis of reaction products, kinetics, or transient events in microreactors or pilot setups.

• Connection with breakthrough curve analyzers: for adsorbents/separations work, tracking outgoing concentrations of multiple species dynamically.

• Working with thermal analyzers (TGA/STA): monitoring evolved gases during heating or reaction, for polymers, composites, catalysts or materials decomposition.

• General gas-analysis tasks: battery manufacturing (gas purity/venting), fuel cell exhaust gas monitoring, hydrogen/CO₂ purity, CVD processes, environmental or industrial monitoring.

Benefits

• Combines high sensitivity and fast response in a relatively compact desktop format compared to large mass spec systems.

• Deep integration capability: designed to work seamlessly as part of larger characterization apparatus, enabling richer data sets (composition + kinetics + surface behavior).

• Reduced background noise and improved reliability through chamber baking and controlled inlet design.

• Flexibility in operation (online/offline, multi-channel) and in integration via software and automation.

Considerations

• Proper infrastructure is required: vacuum systems, appropriate gas handling (for sample inlets), safe exhaust and calibration gases.

• For optimal performance, sample lines, filters, and heating jackets must be carefully managed to avoid condensation or delays.

• Although compact for a mass spectrometer, users must still consider space, safety (radiation/gas), and maintenance (filament replacement, vacuum upkeep).

• Selection of mass range (100/200/300 amu) and detector options should align with your analytical targets (e.g., heavier fragments or multi-component gases).

• Operator expertise in mass-spectrometry, peak interpretation, and coupling with other instruments (e.g., chemisorption or reactor systems) will maximize value.