Help with Residual Gas Analyzers specifications:
Performance Specifications
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| Mass Range: | A measure of the atomic mass range detected by the spectrometer in Atomic Mass Units (AMU). May also be measured in Daltons (Da). | ||
| Search Logic: | User may specify either, both, or neither of the "At Least" and "No More Than" values. Products returned as matches will meet all specified criteria. | ||
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| Smallest Detectable Partial Pressure: | The smallest detectable partial pressure in the vacuum system that the analyzer can detect. | ||
| Search Logic: | User may specify either, both, or neither of the "At Least" and "No More Than" values. Products returned as matches will meet all specified criteria. | ||
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| Resolution: | % Valley Resolution is the valley between adjacent peaks of equal height, throughout the mass range. | ||
| Search Logic: | All matching products will have a value less than or equal to the specified value. | ||
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| Mass Stability: | |||
| Search Logic: | All matching products will have a value less than or equal to the specified value. | ||
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| Maximum Operating Pressure | |||
| Search Logic: | All matching products will have a value less than or equal to the specified value. | ||
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System Configuration
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| Mass Analyzer Design: | The part of the spectrometer that analyzes the process by which a mixture of ionic species is separated according to the mass-to-charge ratio (m/z). The analysis may be qualitative and/or quantitative. | ||
| Your choices are... | |||
| Quadrupole | Quadrupole mass spectrometers consist of an ion source; ion optics to accelerate and focus the ions through an aperture into the quadrupole filter; the quadrupole filter itself, with control voltage supplies; an exit aperture, an ion detector, detection electronics, and a high-vacuum system. | ||
| Magnetic Sector Analysis | Single focusing analyzers: A circular beam path of 180, 90, or 60 degrees can be used. The various forces influencing the particle separate ions with different mass-to-charge ratios. Double Focusing analyzers: An electrostatic analyzer is added in this type of instrument to separate particles with a difference in kinetic energies. | ||
| Other | Other unlisted, specialized or proprietary mass analyzer design. | ||
| Search Logic: | All products with ANY of the selected attributes will be returned as matches. Leaving all boxes unchecked will not limit the search criteria for this question; products with all attribute options will be returned as matches. | ||
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| Ionization Method: | |||
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| Electron Impact Ionization (EI) | Electron impact ionization (EI) source uses an electron beam, usually generated from a tungsten filament, to ionize gas-phase atoms or molecules. An electron from the beam knocks an electron off of analyte atoms or molecules to create ions. | ||
| Field Ionization (FI) | Field ionization is the removal of electrons from any species by interaction with an intense electrical field. | ||
| Chemical Ionization (CI) | Chemical ionization refers to the formation of new ionized species when gaseous molecules interact with ions. The process may involve transfer of an electron, a proton, or other charged species between the reactants. | ||
| Other | Other unlisted, specialized, or proprietary ionization method. | ||
| Search Logic: | All products with ANY of the selected attributes will be returned as matches. Leaving all boxes unchecked will not limit the search criteria for this question; products with all attribute options will be returned as matches. | ||
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| Detector Type: | |||
| Your choices are... | |||
| Electron Multiplier Tube (EMT) | Electron multiplier tubes (EMT) are similar in design to photomultiplier-tubes. They consist of a series of biased dynodes that eject secondary electrons when they are struck by an ion. They therefore multiply the ion current and can be used in analog or digital mode. | ||
| Faraday Cup | A Faraday cup is a metal cup that is placed in the path of the ion beam. It is attached to an electrometer, which measures the ion-beam current. Since a Faraday cup can only be used in an analog mode, it is less sensitive than other detectors that are capable of operating in pulse-counting mode. | ||
| Other | Other unlisted, specialized, or proprietary detector type. | ||
| Search Logic: | All products with ANY of the selected attributes will be returned as matches. Leaving all boxes unchecked will not limit the search criteria for this question; products with all attribute options will be returned as matches. | ||
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User Interface Options
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| Local Interface: | |||
| Your choices are... | |||
| Analog Front Panel | The panel has analog user inputs such as potentiometers, dials, switches, for adjustment of output, ranges, etc. | ||
| Digital Front Panel | The panel uses digital keypads or menus for programming. | ||
| Search Logic: | All products with ANY of the selected attributes will be returned as matches. Leaving all boxes unchecked will not limit the search criteria for this question; products with all attribute options will be returned as matches. | ||
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| Computer Interface? | The spectrometer can be controlled or monitored remotely with a computer via interface. | ||
| Search Logic: | "Required" and "Must Not Have" criteria limit returned matches as specified. Products with optional attributes will be returned for either choice. | ||
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| Computer Interface Options: | |||
| Your choices are... | |||
| Serial Interface | Serial ports or interfaces can be used for serial communication, in which only one bit is transferred at a time. Examples include RS232, RS422, RS485, USB etc. | ||
| Parallel Interface | Parallel interfaces are channels capable of transferring more than one bit at a time. Examples include PC printer ports, Centronics ports, etc. | ||
| Other | Other unlisted or specialized computer interface, such as modem, transmitter, TTL, etc. | ||
| Search Logic: | All products with ANY of the selected attributes will be returned as matches. Leaving all boxes unchecked will not limit the search criteria for this question; products with all attribute options will be returned as matches. | ||
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| Application Software Included? | For control or for monitoring the process. | ||
| Search Logic: | "Required" and "Must Not Have" criteria limit returned matches as specified. Products with optional attributes will be returned for either choice. | ||
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Display Options
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| Display Options: | |||
| Your choices are... | |||
| Analog Meter | Data is displayed with an analog meter or simple visual indicator. | ||
| Digital Readout | Device uses numerical or application specific display. | ||
| Video Display | The data is presented in video form via CRT, LCD, or other multi-line forms. | ||
| None | No integral display. Output is read and displayed remotely. | ||
| Search Logic: | All products with ANY of the selected attributes will be returned as matches. Leaving all boxes unchecked will not limit the search criteria for this question; products with all attribute options will be returned as matches. | ||
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General Features and Functionality
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| Import/Export Capabilities? | Analyzer has the ability to export or import sample data. | ||
| Search Logic: | "Required" and "Must Not Have" criteria limit returned matches as specified. Products with optional attributes will be returned for either choice. | ||
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| Spectral Correction Equations? | Spectrometer has the integral ability to correct for variations in the spectrum generated due to stray light and other parameters. | ||
| Search Logic: | "Required" and "Must Not Have" criteria limit returned matches as specified. Products with optional attributes will be returned for either choice. | ||
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| Quantitative Analysis Capabilities? | The analyzer has the ability to quantify the gases present in the sample. | ||
| Search Logic: | "Required" and "Must Not Have" criteria limit returned matches as specified. Products with optional attributes will be returned for either choice. | ||
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| Self-Calibration? | |||
| Search Logic: | "Required" and "Must Not Have" criteria limit returned matches as specified. Products with optional attributes will be returned for either choice. | ||
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| Extreme Environment? | For use in extreme environments. | ||
| Search Logic: | "Required" and "Must Not Have" criteria limit returned matches as specified. Products with optional attributes will be returned for either choice. | ||
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| Data Storage Options? | Detector has data storage options. | ||
| Search Logic: | "Required" and "Must Not Have" criteria limit returned matches as specified. Products with optional attributes will be returned for either choice. | ||
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| Programmable? | |||
| Search Logic: | "Required" and "Must Not Have" criteria limit returned matches as specified. Products with optional attributes will be returned for either choice. | ||
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| Monitor, Alarm or Process Controller? | |||
| Search Logic: | "Required" and "Must Not Have" criteria limit returned matches as specified. Products with optional attributes will be returned for either choice. | ||
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Environment
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| Operating Temperature: | This is the full required range of ambient operating temperature. | ||
| Search Logic: | User may specify either, both, or neither of the limits in a "From - To" range; when both are specified, matching products will cover entire range. Products returned as matches will meet all specified criteria. | ||
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