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RS PRO ILM201L Light Meter, ±3 (Incandescent) %

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RS PRO LUX/FC Light Meter ILM-201L

RS PRO LUX/FC light meter ILM-201L is a great value instrument offering spectral response close to CIE luminous spectral efficiency, measurements in lux or foot-candles and Silicon photodiode and filter.

Lightweight and pocket-sized, this handheld light meter is ideal for light measuring applications in almost any environment. The sensor is attached to the digital display with a flexible wire for added convenience.

Features and Benefits

• Measuring range: 200, 2000, 20 000, 200 000 lux; 20, 200, 2000, 20 000 foot-candles
• Accuracy ±3% (calibrated to standard incandescent lamp 2856 ºK) and corrected LED day white-light spectrum (±8% other visible light source)
• 3 digits LCD with maximum reading 1999
• Max Hold
• Manual zero adjustment
• Manual ranging
• Meter size 130 x 55 x 38 mm
• Sensor size 80 x 55 x 25 mm
• Wire for light sensor approximately 1.5 m
• Weight (including battery) 250 g


Light meters measure light levels or light pollution within the environment. It’s a key piece of equipment to ensure that there is the right amount of ambient light within the workplace, at school or even at home, and are often used by photographers in studios and natural environments to calibrate film camera equipment. They most often measure light sources like white LED light, fluorescent lighting, metal halide, high-pressure sodium and incandescent lighting. The most common types of environments where light meters are used are:

• Warehouses and factories
• Commercial office buildings
• Hotels and restaurants
• Public buildings
• Schools and other educational buildings
• Libraries
• Museums and art galleries
• Hospitals and other healthcare buildings
• Garages and car parks
• Stadiums and sports & leisure buildings
• Building commissioning, operation and maintenance
• Building security
• Photography and video

How is light measured?

When using this light meter, light levels are measured using the lux scale.


RS PRO aims to be your go-to brand when you need reliability, quality, and affordability. We source high-quality tools and parts from trusted sources and employ expert testing to build a brand you can rely on.

When it comes to test and measurement equipment, RS PRO has an extensive range of solutions. From electrical to environmental measurement, we offer calibrated and multi-function instruments to suit your needs.


JISC1609:1993 and CNS 5119


Best Accuracy±3 (Incandescent) %
Sensor TypePhotodiode
Power SourceBattery
Dimensions55 x 38 x 130mm
FeaturesManual Ranging, Manual Zero Adjustment, Max Hold
Model Number pILM201L