Description
Amprobe LM120 Light Meter
Determine the amount of visible light coming from a light source with this Amprobe LM120 Light Meter.
Suitable for use with fluorescent, metal halide, high-pressure sodium and incandescent light sources, the LM-120 includes a light sensor attached to the main meter via a flexible cable. The light sensor should be held as close to the source as possible to gain a reading.
Light levels can be measure up to 20,000 footcandles (FC) or 200,000 lux with accurate high resolution of 0.01FC/lux. The LM-120 includes both auto and manual ranging modes, plus a zeroing mode which ensures accuracy before measurements taken place.
Want to jot down a reading? Hit the data hold button to instantly freeze the current value on the screen. A dedicated mode for calculating the maximum/minimum light levels over a period of time is also included.
Amprobe LM-120 Technical Specifications
| Illumination | Accuracy at 23°C ± 5°C (73.4°F ± 5°F), < 75% R.H. |
| Sensor | Silicon photodiode and filter |
| Measurement Rate | 2.5 times per second |
| Range | 20, 200, 2000, 20000, 200000 Lux 20, 200, 2000, 20000 Foot candles |
| Accuracy | ± 3% (Calibrated to standard incandescent lamp at 2854°K) 6% other visible light sources Angle deviation from cosine Characteristics 30° ± 2% 60° ± 6% 80° ± 25% Cosine Angular corrected per JIS C 1609:1993 and CNS 5119 general A class |
| Resolution | 0.01 fc/lux |
| Display | 3¾ digit liquid crystal display (LCD) with a maximum reading of 1999 |
| Sampling Rate | 2.5 times per second for digital display |
| Polarity | Automatic, positive implied, negative polarity indication |
| Overrange | (OL) or (-OL) is displayed |
| Zero | Automatic |
| Low Battery Indication | Symbol is displayed when battery voltage level drops below operating level |
| Temperature/Humidity | Operating -10°C to 50°C (14°F to 122°F), 0 to 80%RH Storage -10°C to 50°C (14°F to 122°F), 0 to 70%RH |
| Altitude | 2000m, indoor operation |
| Power Supply | 9V NEDA 1604, IEC 6F22, JIS 006P battery |
| Battery Life | 200 hours |
| Auto Power Off | Approx 6 min |
| Dimension (Base) | 130 x 63 x 38 mm (5.1 x 2.5 x 1.5”) |
| Dimension (sensor) | 80 x 55 x 29 mm (3.2 x 2.2 x 1.1”) |
| Weight | 220 g (.48 lb.) include battery |
