Overview
The Luminance meter BM-9A is a portable device designed for measuring luminance with a wide range of applications. It features three types of detectors (2°, 1°, 0.2°) for versatile usage and improved operational convenience through dip switch mode selection and USB connectivity.

Specifications
- Measurement Range: 0.01 to 28,000,000 cd/m² depending on the detector model (BM-9A20D, BM-9A10D, BM-9A02D).
- Response Speed: Varies from about 1ms to 22ms depending on the measurement range.
- Operating System Compatibility: Windows® 10 Pro and Windows® 11 Pro.
- CPU Requirement: Intel® Core™ i3 2.4GHz or higher.
- Memory: 1GB or more.
- USB Port: USB2.0.

Features
- Interchangeable detectors with a shared main unit.
- Built-in keyboard for luminous intensity calculations.
- Selectable response speeds for flicker and waveform observation.
- Automatic detector recognition by the display unit.
- Correction factor input for post-correction data display.
- Deviation and percentage measurement modes.

Applications
- Measurement of luminance in LCDs, OLEDs, LEDs, street lighting, tunnel lighting, airport lighting, and medical lighting.
- Luminance sensor for robots.
- Transmittance measurement for LCD polarizing plates and filters.
- Measurement of illuminance irregularities in automobile license plates.
- Luminance measurement for guiding blocks for visually handicapped individuals.

Options and Accessories
- AC Adapter ZV-42 for continuous measurement.
- WS-3 Reference White Board for directional light source measurement.
- Extension cables available in various lengths (2m to 30m).
- Attachment lens AL-13 for reducing measurement area.
- Tripod 5N for easy collimation.

Data Handling
- Measured data can be retrieved via USB and stored in CSV format using the MT-100 software, which supports continuous measurement up to 99,999 times.

Additional Information
- The device includes a USB interface with specific baud rate and data length settings.
- Options for analogue output speed and correction factor modes are available.