TES-1339 High-Accuracy Digital Light Meter

Description

The TES-1339 is a professional, high-accuracy digital light meter manufactured by TES Electrical Electronic Corp., used for measuring illuminance in lux (lx) and foot-candles (fc). It is known for its wide measurement range and feature-rich design, including variants like the TES-1339P (photosynthesis light quantum meter) and TES-1339R (datalogging version).

Key Features

• Dual-display: A 4-digit LCD shows the current reading and other information simultaneously.
• Broad measurement range: The meter can measure from 0.01 to 999,900 lux with five-step auto-ranging.
• High accuracy: It provides an accurate and instant response with a spectral sensitivity designed to closely match the human eye (CIE photopic curve).
• Data hold: Freezes the current reading on the display.
• Maximum/minimum: Records the highest and lowest readings over a measurement period.
• Memory: Stores and allows for the recall of measurement data.
• Connectivity: Some models include an RS232 interface for connecting to a computer, with datalogging versions featuring internal memory for logging up to 40,000 sets of data.
• Power: Typically runs on AAA batteries.