The Model 9.4 Blue Light Meter uses a GaP Photodiode packaged in hermetically sealed UV glass window cap. Filter used to narrow response as shown on spectral response graph. Applications include monitoring blue LED/lamp intensity and aging, monitoring aquarium lamp intensity and aging, monitoring acne lamp intensity and aging, testing eyewear actinic blocking capabilities, measuring outdoor blue light, and measuring photosynthetic action spectrum blue band. To operate press and hold push-button switch on face of unit. Aim sensor window in top panel of meter directly at blue light source. Note reading on LCD and record if desired. Battery operation voltage is 9V down to 6.5V. Below 6.5V the LCD numbers will begin to dim, indicating the need for battery replacement. Under typical service load, the battery should last approximately 2 years.
- High accuracy measurement of Blue light
- Measures 422Nm to 499Nm
- Range from 0-199.9 mW/cm² Blue light
- NIST Traceable calibration Certificate included
- Simple, one hand operation