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Blue Light
Safety Detector |
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FEATURES
 | High sensitivity |
| Dynamic range 2*105 |
| Excellent long term stability |
| Cosine corrected |
| NIST traceable calibration |
| Ease of use |
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| The PMA2121 blue light safety
detector offers an accurate, easy, inexpensive way to measure the blue light radiation
hazard to eyes for a wide range of occupations. Employers, safety officers and risk
managers can use this detector to protect workers against the effects of excessive daily
blue light exposure. Such exposure, |
APPLICATIONS
| Industrial and laboratory safety |
| Welding stations |
| Printing |
| UV curing and photolithography |
| Lighting |
| Safety glass testing |
| Environmental testing |
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| according to numerous medical studies, can inflict
permanent and irreversible damage to the eye causing visual field defects and visual
impairment.
The PMA2121 detector indicates the effective irradiance weighted with
the American Conference of Governmental Industrial Hygienists (ACGIH) Spectral Weighting
Function for blue light hazard. Light sources that may produce a blue light hazard
include: monochromatic and collimated lasers as well as collimated arc, or tungsten lamps
(e.g. search lamps). Flash lamps generally do not present serious hazard because of the
limited energy of the flash as compared to continuous sources.
To protect against retinal photochemical injury from chronic blue-light, the max.
exposure limit for a source subtending less than 0.011 radian should not exceed 10mJ/cm2 per 10,000 seconds of exposure (approx. 2 hours 47 minutes). For
exposure periods greater than 10,000 seconds the weighted irradiance should not exceed
1µW/cm2. |
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Typical blue light levels are: |
| 150 W halogen lamp at 50 cm distance |
70 µW/cm2 |
| 150 W Xe arc lamp at 50 cm distance |
80 µW/cm2 |
| 40 W fluorescent tube at 2 m distance |
5 µW/cm2 |
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SPECIFICATIONS
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| Spectral response |
Follows ACGIH blue
hazard action spectrum Figure 1 |
| Angular response |
5% for angles <60° |
| Range |
2,000
µW/cm2
20,000 mW/cm2 |
| Display resolution |
0.01
µW/cm2
0.1 mW/m2 |
| Operating environment |
32 to 120 °F (0 to
+50 °C) no precipitation |
| Cable |
1ft, retractable to
5ft (0.3m/1.5m) |
| Diameter |
1.6" (40.6 mm) |
| Height |
1.8" (45.8 mm) |
| Weight |
7.1 oz. (200 grams) |
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Analog versions of this detector are available See PMA1121 |
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Return to Detector Selection Guide
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