| 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. |