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Amprobe LM100
Digital Light Meter

Measure in Lux or Footcandles, front panel switchable
Measuring Range to 20,0000 Lux or 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
Auto Power Off to save battery life
Includes protective sensor cap
Large, 3-1/2 digit display

Amprobe LM100 Shown

Product Information

Datasheet 271 KB

Manual 544 KB

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The Amprobe LM-100 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 footcandle (fc) units. The LM-100 measures a wide range of light up to 20,000 fc or lux with an accurate, high resolution of 0.01 fc/lux.

Use the LM-100 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 footcandle = 10.764 lux and 1 lux = 0.09290 footcandles.

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
General Specifications
Display		3 ¾ digit liquid crystal display (LCD) with a maximum reading of 1999
Sample Rate		2.5 times per second for digital display
Polatity		Automatic, positive implied, negative polarity indication
Overrange		(OL) or (-OL) is displayed
Zero		Automatic
Low Battery Indication		The is displayed when the battery voltage drops below the operating level
Temperature / Humidity	Operating	-10 °C to 50 °C (32 °F to 122 °F); 0 to 80%RH
	Storage	-10 °C to 50 °C (32 °F to 122 °F); 0 to 70%RH
Altitude		2000m, indoor operation
Battery		9V NEDA 1604, IEC 6F22, JIS 006P battery
Battery Life		200 hours
Auto Power Off		approx 6 min