Singapore legislation

Schedule 2

of Radiation Protection (Non-Ionising Radiation) Regulations

Schedule 2

Classification of lasers

SECOND SCHEDULERegulations 2(2), 35(1) and 37(1), (5), (10), (11), (13), (14) and (19)Classification of lasersThe hazard classification specified for lasers are defined by the output parameters and accessible emission levels (AELs) of radiation. The classes are as follows:Class 1: Class 1 lasers are those that are inherently safe so that the maximum accessible emission level as specified in Table 1 cannot be exceeded under any condition, or the lasers are safe by virtue of their engineering design.Class 2: Class 2 lasers are those emitting visible laser radiation in the wavelength range from 400 nm to 700 nm. The maximum accessible emission levels are as specified in Table 2.Class 3a: Class 3a lasers are those that emitting visible and/or invisible laser radiation with the maximum accessible emission levels as specified in Table 3.Class 3b: Class 3b lasers are those emitting visible and/or invisible laser radiation with maximum accessible emission levels as specified in Table 4.Class 4: Class 4 lasers are those emitting visible and/or invisible laser radiation at levels exceeding the accessible emission limits for Class 3b as specified in Table 4.Table 1Accessible Emission Limits for Class 1 Laser ApparatusTable 2Accessible Emission Limits for Class 2 Laser ApparatusTable 3ACCESSIBLE EMISSION LIMITS FOR CLASS 3a LASER APPARATUSTable 4Accessible Emission Limits for CLASS 3b LASER APPARATUSTable 5Accessible Emission Limits for Collateral Radiation from Laser Products

1. Accessible emission limits for collateral radiation having wavelengths greater than 180 nm but less than or equal to 1.0 x 106 nm are identical to the accessible emission limits of Class 1 laser radiation —

(i)

in the wavelength range of less than or equal to 400 nm, for all emission durations;

(ii)

in the wavelength range of greater than 400 nm, for all emission durations less than or equal to 1 x 103 seconds.

2. Accessible emission limit for collateral radiation within the X-ray range of wavelength is 5 µSv/hr, averaged over a cross-section parallel to the external surface of the apparatus, having an area of 10 cm2 with no dimension greater than 5 cm.[S 517/2019 wef 01/08/2019]