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    Address:Rm. 2-20901, Tsinghua Science Park, Technology Road 65, High-tech District, Xi'an, Shaanxi Province, China, 710075
    Tel:86-029-8844 4525
    86-029-8868 8901
    Fax:86-029-8868 8683

    EM high voltage power supply

    Maximum output voltage(KV):20,30


    Transmission Scanning Electron Microscope

    Scanning Electron Microscope

    High Precision, Low Noise, Ultra Stable

    Over Current/Voltage Protection

    Arc and Short Circuit Protection

    RS232/485 OPTIONAL

    OEM Customization Available

    Ripple 2ppm


Product introduction



Wisman's EM series is designed to power the electron beam of scanning electron microscopes. It provides acceleration power, bias power and filament power in a compact package. At the same time, it integrates the commonly used scintillator power supply, PMT power supply and collector power supply for electron microscopes. It constitutes the power supply of the electron microscope system.Wisman's own high-voltage design and packaging technology has made the EM series of electron microscope high voltage power supplies a noticeable improvement in size, cost and performance. The EM series provides excellent adjustability, high reliability, and low ripple and high stability. The accelerating power supply voltage can be given from 0 to -30kV, and the current is 300uA. EM series provides reference accelerant suspension bias and filament power supply. The power supply adopts fully digital communication control to minimize the influence of external noise on the system and provides accelerating pole current display referenced to ground. Wisman’s EM series has arc, short circuit protection, overvoltage protection, and overcurrent protection functions.

Typical applications:

SEM(Scanning Electron Microscope)

Eelectron Beam

Metal 3D Printer

Vacuum Gun

Ion Beam Etching

Focus Ion Beam Lithography

Scientific Experiment

Industrial Applications 


Input Voltage: +24Vdc, ±5%,

Accelerator Power Supply

High Voltage Outputs:

Output Voltage:

EM20N4 output ranges from 20V~- 20kV; EM30N6 output ranges from 30V~- 30kV

0V to -20kV full load with respect to ground

Output Current: 200μA maximum

Load Regulation: <±100ppm(from  no load to full load ).

Line Regulation: <±100ppm(Input voltage changes 10%).

Ripple : <10ppm

Temperature coefficient: 25ppm/°C

Stability: 10ppm/3 minutes after 1 hour's  warm up

BIAS Power Supply

Output voltage :Ranges from 0~ -2000Vdc

Output current :0~ 150uA.

Load Regulation :≤0.2%(from no load to full load ).

Line Regulation : ≤0.1%(Input Voltage changes 10%).

Ripple :≤10ppm.

Temperature Coefficient :25ppm/℃.

Stability :0.001% /3min after 1 hour's warm up.

Filament Power Supply

Output current:Output current ranges from 0~3A,load 1 Ω.

Load Regulation :±0.1%(from no load to full load ).

Line Regulation : ± 0.1%(Input Voltage changes 10%).

Ripple :≤0.1%..

Temperature Coefficient :25ppm/℃.

Stability :100ppm/ 10min after 1 hour's warm up.

Scintillator Power Supply(optional)

Output Voltage:ranges from 0~ 10kVdc,

Output current :0~250uA.

Load Regulation:<0.001% (from no load to full load).

Line Regulation:≤0.001%(Input Voltage changes 10%).


Temperature Coefficient:25ppm/℃.

Stability:≤0 007% /hr.≤0.01% /8hr,after 1 hour's warm up

Collector Power Supply(Optional )   

Output Voltage:ranges from 0~ 400Vdc,

Output current :0~500uA.

Load Regulation:±0.001% (from no load to full load).

Line Regulation:±0.001%(Input Voltage changes 10%).


Temperature Coefficient:25ppm/℃.

Stability:≤0.007% /hr.≤0.01 % /8hr,after 1 hour's warm up

Microchannel Plates Power Supply (Optional )

Output Voltage:ranges from 0~1500Vdc,

Output current:0~1000uA. 

Load Regulation:0.001% (from no load to full load).

Line Regulation:±0.001%(Input Voltage changes 10%).


Temperature Coefficient:25ppm/℃.

Stability:≤0.007% /hr.≤0.01% /8hr,after 1 hour's warm up

For information concerning our high voltage products, please call at 086 029 89282015 or visit our website www.wsmhv.com

Wisman advances medical care, industrial processes, quality control, scientific research, security and telecommunications by providing innovative high voltage power supplies including micro-modules high voltage power supply, modules high voltage power supply, X-ray generator, rack mount voltage power supply, special customized high voltage power supply, high voltage accessories, etc. that enable equipment manufacturers to improve their systems’ performance, reliability, cost and bottom line. Power range from 100mW to 200kW, voltage range from 60V to 500kV. You can purchase multiple varieties and specifications in one-stop from us. We have a high-voltage power supply research and development team, high-voltage power supply development software and software for testing high voltage insulation technology and zero current resonance technology, making our high voltage power supplies maintain high stability, low ripple, excellent in EMC. Our products are compact, highly efficient with a long operating life.

Wisman high voltage power supplies are competitively priced and a great idea for OEM customers.

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