The Lux and UV probe is applicable to exhibits where the light sensitive paintings, fabrics or papers must have logs of their cumulative exposure.<br />
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For measurements in workplaces, for example in offices or in production areas: use the lux probe (with the compatible measuring instrument) to measure illuminance.

The Lux probe is applicable to exhibits where the light sensitive paintings, fabrics or papers must have logs of their cumulative exposure.

<div style="background-color: #f4f3f1;border: 1px solid #e8e6e3;border-top-left-radius: 16px;border-top-right-radius: 16px;padding: 1rem;margin: 0 -1rem 1.5rem;"><b>When you register your product, we will extend the regular manufacturer's warranty by one year. <a href="https://www.testo.com/en-US/services/product-registration-climate">&gt;&gt; Register now and get a warranty extension.</a></b></div>Ideal for Commissioning and IAQ investigation professionals

The testo 540 light meter is a quick and easy to use entry level model for measuring lighting conditions in the workplace.

<div style="background-color:#dae4ea; border: 1px solid #648798; padding: 10px;"><b>Product no longer available. Have you checked out its successor?<br/>Why not enjoy the benefits that it has to offer: <a href="…/p/0563-1545">>> To the product</a></b></div>

With the compact Lux meter testo 545, you can measure the illuminance of all common light sources easily, quickly and precisely to ensure productivity, performance and health in workplaces. The testo Smart App supports you with useful functions, e.g. configuration, display (also as second screen) and storage as well as documentation of the measured values directly in the App.

This ISO calibration certificate certifies that your measuring instrument or probe is calibrated. Calibration is carried out according to the ISO standard.

ISO luminous intensity calibration certificate - with 5 measuring points

ISO calibration certificate/light

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ISO luminous intensity calibration certificate - with 5 measuring points

ISO luminous intensity calibration certificate - with 5 measuring points

General technical data