UCL Department of Space and Climate Physics


ISO class 5 Cleanroom

Assembly, test and integration of spacecraft components, instruments and structures, Moments of Inertia (MOI) and centre of gravity of flight hardware.

The MSSL ISO class 5 cleanroom is based upon the horizontal laminar flow design, with one complete end wall being a bank of HEPA (High Efficiency Particle Air) filters.


Typical activities taking place within the cleanroom facility are:

  • Assembly, test and integration of space flight hardware components, instruments and structures
  • Assembly, alignment, test and integration of space flight optical components and structures


Dimensions: 15m (L) by 8m (W)

Filtration efficiency: HEPA, 99.997% for 1 micron diameter particles

Laminar flow benches: Yes, two ISO Class 4 laminar flow benches available

Network: Yes, 10/100 Mb

Gas supply: Yes, several nitrogen gas supply outlets for instrument purge. Zero grade nitrogen available

Temperature: 20oC +-2oC

Humidity: 50% RH +-10%

Max. occupants: 8

Cleanroom validation: Yes, by external independent contractors

Electrostatic protection: Yes, designated EPA areas within cleanroom regularly verified to ANSI/ESD S20.20-2007 - Protection of Electrical and Electronic Parts, Assemblies and Equipment


Nominal, currently being prepared for refurbishment in Nov/Dec 2011