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RS PRO IM720 Light Meter, 400lx to 400000lx, ±3 %

Temporarily out of stock - back order for despatch 25/05/2021, delivery within 2 working days from despatch date
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RS Pro Mini Pocket Light Meter IM-720

RS PRO mini pocket light meter IM-720 is a great value lux/foot-candle light meter. It measures light from visible sources (sun, moon or any light-emitting body) and from equipped fluorescent, metal halide, high-pressure sodium and incandescent sources.

Lightweight and pocket-sized, this mini handheld light meter is ideal for light measuring applications in almost any environment. The sensor is attached directly to the reader for compact convenience, and has a lens cap to ensure the sensor remains protected when not in use.

Features and Benefits

• To JISC1609 : 1993 and CNS 5119 general A class specifications
• Spectral response close to CIE luminous spectral efficiency
• Measures intensities of illumination displays in lux or foot-candles
• Silicon photo diode and filter
• Light sources measured include all visible light sources
• Cosine angular corrected
• Auto power off and disable function
• Data hold, Max/Min/AVG hold
• Real Zero function
• Auto-ranging
• Light source selecting Tungsten/Daylight, Fluorescent, 0 ∼ 9 select rating
• Measuring range 400,4000,40 000,400 000 lux, 40,400,4000,40 000 foot-candles
• Accuracy ±3% ±3 lux, 0 ∼ 500 lux, ±3% up 501 lux (calibrated to standard incandescent lamp 2856°K), ±8% other visible light source
• Powered by 1.5 V AAA batteries (x2)
• Dimensions 133 x 48 x23 mm
• Weight (including battery) 80 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 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.


When the meter is not in use, keep the cap of the light sensor in position to avoid the photo diode wearing out.

Supplied with

1.5 V AAA batteries (x2), carrying case, user manual


Maximum Light Level400000lx
Minimum Light Level400lx
Best Accuracy±3 %
Resolution3 lx
Sensor TypePhotodiode
Battery TypeAAA
Power SourceBattery
Dimensions133 x 48 x 23mm
Model Number pIM720