Electron Multiplier Detectors
with Ultra-Slow Depletion
Get new multipliers at a fraction of the cost your mass spectrometer manufacturer quotes. Control costs in your lab & preserve your job. Earn points on every order to reduce your spending further. Reduce your cost per test every time you turn on your MS. Looking for something specific?
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Manufactured in the USA
High quality electron multipliers preserve the integrity of your work. These are manufactured in Palmer, MA.
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OEM electron multipliers for your brand of mass spec.
Your manufacturer inflates the price of replacement parts because they think you don’t have any other options. And they’re wrong.
The multipliers you get from us are manufactured in the USA to higher quality standards than theirs.
You can get them for your brand of MS today.
“I prefer OEM aftermarket parts like these electron multipliers because of the quality and price. More manufacturers are using these exact parts in their new instruments anyway, so why not get them at a lower price before the big brand manufacturers get their hands on them? It’s one of the ways I control costs in the lab.”
Multipliers for Agilent/HP mass specs
Multiplier, HP 5988/88A & 5985/87 Pos,Neg Ion
Multiplier-5988/88A/85/87(3 lead)30/80/81/82/83/84
Multiplier and Mount for HP 5973, ETP Type
Multiplier Only for HP 5973, ETP Type
Multiplier, Agilent 5900 Series, Small horn
Multiplier, HP59xx instr group, KM large horn
Multiplier, HP 5970-70A-70B
Multiplier HP 5971/72, HP sm.horn w/MOUNT
Mount, Small Horn, HP 5971 / 72
Multiplier, Agilent 5975C, 5977, & 7000 instrument groups, small horn
Multiplier for HP5988A & 5988
Filament for Agilent/HP 5971
EI Filament for Agilent® 5972, 5973, 5975 & 5977
Multipliers for PerkinElmer Sciex mass specs
Multiplier & Mount, PE Ion Trap & Saturn I-III
Multiplier, PE QMASS, w/ mounting flange
Multiplier, PE Sciex API 3000/4000
Multiplier, PE Sciex, API III - LC/MS
Filament Assembly for Ion Trap Device (ITD)
Multipliers for Varian mass specs
Electron Multiplier, for Varian Saturn 500, 2000, 2100, 2200, 4000
Multiplier, Varian, GC-MS, 1200
Filament Assembly for Ion Trap Device (ITD)
Multipliers for Shimadzu mass specs
Multiplier, Shimadzu QP5050/QP8000 mount w/HED
Filament Assembly for Shimadzu QP2010
ilament Assembly for Shimadzu QP5000
What makes these electron multipliers worth your budget?
You get a lower price on multipliers many manufacturers are now using in their instruments from the beginning.
You get:
- Optimized ion and electronic optics
- Larger surface area than other brands (for significantly longer product life)
- A proprietary, specialized surface material
- Superb air-stability
- Superior signal collection and noise reduction
Electron multiplier frequently asked questions
How to pre-condition your multiplier
To get the longest lifetime from your multipliers, they should all be pre-conditioned.
This allows loosely bonded water molecules to be released from the surface.
To do it, place your multiplier under vacuum. It is recommended that a vacuum of 10-6 Torr or better be used.
Once the appropriate vacuum is reached, apply a small input to the multiplier. In counting mode approximately 15,000 counts/second. In current mode approximately .1uAmp.
Raiser the voltage slowly to reach an appropriate gain level.
- In counting mode this should be approximately 107.
- In current mode this should be approximately 105.
Run the multiplier like this for several hours to avoid a rapid release of water molecules, which can shorten the life of the multiplier.
How is your electron multiplier made?
Your electron multiplier detector starts with a specialty lead silicate glass. Then it goes through six steps.
1. Extrusion
The process starts with a glass billet that is extruded and drawn to final diameter. A work piece is then cut from the drawn material that is about 4-6 inches long.
2. Flaring
The glass is then flared over a hot carbon tool that puts a conical shape on the end of the multiplier.
3. Bending
The glass is then bent in a furnace over a mandrel. The curvature of the channel is important since it eliminates ion-feedback in the channel.
4. Sizing
Next, the unit is ground to final size on a diamond wheel. The multipliers are then processed in a series of chemicals that will clean and enhance the surface for further processing.
5. Reduction
The unit is then reduced in a hydrogen atmosphere under specific time and temperature conditions. This is the critical process that activates the surface of the glass through and ion exchange process that creates the silica enriched layer on the surface.
6. Completion
A section of the unit is then sandblasted away to create a single conduction path on the multiplier to create the proper voltage gradient. A mild steel is evaporated on the multiplier to create a short on the outside for electrical connections. The unit is now ready to be assembled. Depending on the system and the ion optics, each unit is mounted precisely in a frame that consists of stainless steel and ceramic parts. After the assembly is complete, the unit is then put under vacuum and tested for both gain and noise. 100% of the multipliers we sell are tested and certified for quality.
How do I clean a multiplier that gets contaminated?
In the event that a multiplier becomes contaminated, it should be flushed with isopropyl or methanol.
The multiplier can then be blown with dry nitrogen and baked at 150°C until dry.
Multipliers should never be cleaned in acid, which will hurt performance and reduce overall lifespan.