This European Standard specifies the scale numbers and transmittance requirements for filters for protection against infra-red radiation. The other applicable requirements for these types of filters are given in EN 166. Guidance on the selection and use of these filters is given in Annex A.
Legislation related to this standard
WITHDRAWN
EN 171:1992
99.60
Withdrawal effective
Mar 20, 2002
WITHDRAWN
EN 171:2002