Channeltron® Electron Multipliers

Photonis is the original manufacturer of Channeltron® electron multipliers, which offer the highest dynamic range to assure an absolutely linear response beyond the limits of most analytical instruments.

Longer life
Higher dynamic range
Reduced ion feedback
Noise less than 1 count/second
Excellent single ion sensitivity

Technical Information

Miniature Channeltron® Electron Multiplier

channeltronThe miniature Channeltron® electron multipliers are specially designed to be used in portable analog or pulse-counting applications such as leak detectors, portable mass spectrometers, and sensors for environmental and industrial use. With a gain greater than 10 million and reduced noise, these miniature detectors are the ideal solution to critical detection applications.
Notably, our miniature Channeltron® Electron Multipliers are able to operate at pressure ranges as high as  5x10-5 torr, with low dark counts. Cones, grids, coatings, collectors and leads can all be specified, or you can choose from one of our many standardized models.

Download the Miniature CEM Specifications

Download Channeltron® Electron Multiplier Brochure

Spiraltron™ High Pressure Electron Multipliers

SpiraltronPhotonis engineers specially designed the Spiraltron™ electron multipliers to deliver high performance at pressures up to 10-2 torr. Its small, compact, linear design enables longer detector life and higher dynamic range in various analytical instruments. 

Download the Spiraltron™ brochure

Download the Spiraltron™ specification




MegaSpiraltron™ Detector

megaspiraltronThe MegaSpiraltron™ detector is a physically small, robust ion detector that can achieve high gain while maintaining low noise. These detectors have a compact, durable design and are only 1.35” long and 0.6” in diameter. MegaSpiraltronsTM use the six channel spiral technology to operate at the highest pressure of any of our detectors at 1 x 10-3. With extended dynamic range and enhanced sensitivity, Photonis’ MegaSpiraltron™ technology are ideal for high pressure environments such as portable mass spectrometers.




MAGNUM™ Electron Multiplier

magnum-electron-multipliersMAGNUM™ electron multipliers provide high dynamic range with high gain and low noise. Available in either analog or pulse counting applications.
Similar to other Channeltron® products, the MAGNUM™ family of electron multipliers is also based on the six-channel technology, increasing secondary electron generation and increasing linear output. The MAGNUM™ family of products are offered in several models, including the 5900, 5901, 5902, 5903, and 5904. They operate at pressures to 7 x 10-4 torr and can be used in analog or pulse counting applications.

Download the MAGNUM Electron Multiplier 5900 Series Specification


Our advanced designs provide the highest sensitivity through superior signal collection and noise reduction. 

Available in various shapes, sizes, and voltages, Photonis’ Channeltron® electron multipliers are engineered to deliver the highest performance available on the market. Cones, grids, coatings, collectors and leads can all be specified, or you can choose one of our many standard models. Improvements in conversion dynode technology have resulted in structures capable of operation at higher voltages and materials with improved ion-to-electron conversion yields for better sensitivity at higher masses.

More than half of the world’s mass spectrometer manufacturers rely on Photonis’ Channeltron® detectors to improve the reliability of their instruments. Due to their low mass and high gain, Channeltron® electron multipliers are also used in many nuclear physics labs and space applications to count electrons and charged particles in pulse mode operation. Other applications include residual gas analysis, plasma analysis, Auger, electron spectrometers, SEM, FIB and leak detectors.

As the original manufacturer, Photonis is able to customize Channeltron® electron multipliers to fit various instruments. We can provide complete assemblies as well in order to simplify the installation process. If you are looking to replace the detector in your analytical instrument, download our OEM Replacement Guide to find the right detector for your instrument.

Looking for a remplacement detector?

Download our OEM Guide now:

Download PDF

How does a Channeltron® work?

Improvements in conversion dynode technology have resulted in structures capable of operation at higher voltages and materials with improved ion-to-electron conversion yields for better sensitivity at higher masses.

Channel electron multipliers directly detect and amplify energetic photons and charged particles such as positive and negative ions, electrons and assorted molecular and subatomic particles. In the diagram below, 

How does a Channeltron work?

Why choose genuine Channeltron® detector?

If you want a true Channeltron® Electron Multiplier, you must come to Photonis. As the original manufacturer of these products, we have the experience and knowledge necessary to recommend the right detector for your instrument. For years, customers have been using Channeltrons® because of their superior ability to provide the most accurate analysis. Find out why Channeltrons® are considered to be the premium choice among instrument manufacturers.

Download the paper 

High pressure electron multiplier detectors

In today’s evolving market, there is a greater need for smaller detectors that are able to perform in high pressure and poor vacuum environments. Learn more about the products Photonis designs for these applications:
Characterization of Common Electron Multipliers in Harsh Environments (You need to sign in to download the file)

Optimizing the performance of your mass spectrometer

The performance of your mass spectrometer is often limited by the capabilities of the detector. Photonis developed an electron multiplier family called the MAGNUM™, which provides significantly improved performance by increasing linear output current, reducing noise, and increasing detector life.

Improved Lifetime and Performance for your Mass Spectrometer




Related Applications

Atmospheric Analysis - Charged Particle Amplification - Comet and Asteroid Observation
Environmental Monitoring - Food and Drug Safety - Gas/ Liquid Chromatography MS
High Energy Phenomena Imaging - ICP-MS - Ion Mobility Spectrometry
Ion Transport - Ion Trap MS - Magnetic Sector MS - MALDI TOF
Mass Spectrometry - OEM Partnership - Residual Gas Analysis
Single & Triple Quad MS - Time of Flight MS - Weather and Solar Monitoring
X-Ray - UV and VUV Spectroscopy - Portable Instrumentation

Resource center

Are you looking for a specification sheet or paper? Documents like these and more are available in the Photonis Resource Center. 

Visit the Resource Center

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