Effusion Cell EF 40C1

EF 40C1 Effusion Cell (Knudsen Cell) is a source designed for indirect resistive heating and delivering highly constant evaporation rates.



Prevac are a world leader in the design and production of analytical and deposit scientific and research equipment. Their systems operate in a high and ultra high vacuum environment. They design and construct UHV and HV systems fully adapted to the individual requirements of research projects and industrial applications.

Key Features

  • Extremely stable flux rates
  • Various crucible materials
  • Highly reproducible & reliable
  • Suitable for use in any MBE system
  • Mo free construction (allows high outgassing temperatures)
  • Integral water cooling


Custom insertion length 114 – 380 mm (other on request).

Technical data

Mounting flange DN 40CF (rotatable)
Heater W wire (tungsten)
Temperature range EF 1500 °C (~250 °C – 1500 °C, 1600 °C for degas)
EF 1200 °C (~250 °C – 1200 °C)
Temperature stability ± 0.1°C
Crucible type (option) PBN, Al2O3, Quartz (other materials on request)
Crucibles volume 5cc
Evaporated materials All typical materials according to crucible type
Thermocouple type EF 1500 °C – type C (standard)
EF 1200 °C – type K (option)
Degassing temp. 1600 °C
Type of shutter side or flip type, manual or pneumatic
Water cooling (required) water flow: > 0.5 l/min, temperature: 20 – 30 °C, max pressure: 6 bar
Insertion length min. 114mm (other on request) OD: 35 mm
Spot size Dependent on working distance
Working distance 100 – 150 mm
Bakeout temperature up to 250 °C
Working pressure < 10-5 mbar



Instruments with Electronics Brochure

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  • Customised insertion length
  • With or without integrated manual/electro-pneumatic shutter
  • Linear shift
  • Crucibles
  • Thermocouple type C or K

Service Support

Comprehensive repairs and servicing

Annual Support Programs

Your metrology instrumentation is a major investment that is critical to your business operation and success. In today’s competitive climate, it is more important than ever to extend the functionality and peak performance of your metrology equipment years beyond the expiration of your factory warranty. CN Tech’s Support Programs will help ensure that your investment is protected, and that you and your instrument’s are always operating at peak performance.

With over 20 years’ experience servicing and repairing you can be assured that your system is in safe hands. The independent services we offer include system relocation, maintenance visits, parts and consumables, and break down interventions.

CN Tech’s Support Programs are an economical way to guarantee optimal working condition:

  • Annual Preventive Maintenance
  • Priority Technical Assistance
  • Preferred Parts Availability
  • On-Site User Training
  • Remote Diagnostics
  • No surprise repair expense and much more!

Support Contact Example

An example of our service and support contracts are shown below:


Metrology & Instrumentation Annual Support Programs 2022/23

CN Tech's Support Programs will help ensure that your investment is protected, and that you and your instrument’s are always operating at peak performance.

Get in touch to discuss your requirements

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