SKU: LM-120
Amprobe LM-120 Light Meter
Measure in lux or footcandles, front panel switchable Measuring range to 200,000 Lux or 20,000 foot candles Silicon photodiode sensor and filter Data hold to freeze reading on the digital display Min/max ability to show high and low readings Autoranging plus manual range Zero function to null display before a reading Auto power off to save battery life Includes protective sensor cap Large, 3-1/2 digit display
Specifications
| Sensor | Silicon photodiode and filter |
| Measurement Rate | 2.5 times per second |
| Range (Lux) | 20, 200, 2000, 20000, 200000 Lux |
| Range (Foot Candles) | 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 Correction | Per JIS C 1609:1993 and CNS 5119 general A class |
| Resolution | 0.01 fc / lux |
| Display | 3¾ digit liquid crystal display (LCD), maximum reading 1999 |
| Sampling Rate | 2.5 times per second |
| Polarity | Automatic; positive implied, negative polarity indicated |
| Overrange | (OL) or (-OL) displayed |
| Zero | Automatic |
| Low Battery Indication | Battery symbol displayed when voltage drops below operating level |
| Operating Temperature | -10°C to 50°C (14°F to 122°F) |
| Operating Humidity | 0 to 80% RH |
| Storage Temperature | -10°C to 50°C (14°F to 122°F) |
| Storage Humidity | 0 to 70% RH |
| Altitude | 2000 m, indoor operation |
| Power Supply | 9V NEDA 1604 / IEC 6F22 / JIS 006P battery |
| Battery Life | 200 hours |
| Auto Power Off | Approx. 6 minutes |
| Dimensions (Base) | 130 x 63 x 38 mm (5.1 x 2.5 x 1.5 in) |
| Dimensions (Sensor) | 80 x 55 x 29 mm (3.2 x 2.2 x 1.1 in) |
| Weight | 220 g (0.48 lb) including battery |
| Agency Approvals | CE. EMC EN61326-1; complies with EU Directives 89/336/EEC (Electromagnetic Compatibility) and 73/23/EEC (Low Voltage) as amended by 93/68/EEC (CE Marking) |
Datasheet
Download datasheet (PDF)Description
The Amprobe LM-120 light meter measures the visible light from fluorescent, metal halide, high-pressure sodium or incandescent sources. It is a portable, easy-to-use digital light meter designed for simple one-hand operation reading in Lumen (lux) or foot candle (fc) units. The LM-120 measures a wide range of light up to 20,000 fc or 200,000 lux with an accurate, high resolution of 0.01 fc/lux. This unit is Auto-ranging plus manual ranging with ability to Zero out the reading before taking a measurement.
Use the LM-120 light meter to measure the illumination level in the interior and to switch off or reduce or increase the output level of lighting fixtures. Reduce the energy burden of the building by significantly increasing the efficiency of its lighting system.
One lux is the illumination from a one candela lamp perpendicular to a surface one meter squared at a distance of one meter. One fc is the illumination from a one candela lamp perpendicular to a surface one foot squared at a distance of one foot. 1 foot-candle = 10.764 Lux and 1 lux = 0.09290 footcandles.
Need this instrument calibrated?
Unitest Instruments operates Singapore's SAC-SINGLAS accredited calibration laboratory (ISO/IEC 17025, Lab No. LA-2023-0845-C). We provide traceable calibration with full documentation for most test & measurement instruments.
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