Extech LT Series Light Meter, 400,000lx, 560g

The Extech LT Series Light Meter is a professional-grade instrument designed for precise measurement of light intensity in a wide range of applications. It offers a high-resolution capability of 0.01 Fc/Lux, ensuring detailed readings for critical lighting assessments. With a maximum measuring range of 400,000 Lux (or 20,000 Foot-candles), it is suitable for everything from workplace safety inspections to photography studio setups and horticultural lighting analysis.

A key feature is the inclusion of a remote light sensor on a 12-inch (305mm) coiled cable, which can be extended to 24 inches (609mm), allowing for convenient placement in hard-to-reach areas. The sensor utilises a precision photodiode and a colour correction filter to provide cosine and colour-corrected measurements, ensuring accuracy across different light sources and angles.

Advanced Functionality

The meter incorporates several advanced functions to aid data collection and analysis. The Relative Mode indicates changes in light levels from a baseline, perfect for comparing illumination before and after adjustments. The Peak Mode captures and holds the highest reading encountered during a measurement session. Furthermore, the MIN/MAX feature automatically stores the maximum and minimum readings, while the Data Hold function freezes a reading on the display for easy recording.

Operational clarity is enhanced by a large LCD display with an analogue bar graph for quick trend visualisation. A built-in backlight ensures readability in low-light conditions, making it practical for use in dimly lit environments.

Specifications at a Glance

• Maximum Measurement: 400,000 Lux / 20,000 Foot-candles
• High Resolution: 0.01 Lux / 0.01 Fc
• Accuracy: ±(5% of reading + 0.5% of full scale)
• Sensor: Remote photodiode with colour correction filter
• Cable: 12-inch (305mm) coiled, extendable to 24