ISO 16331-1 - Certified Accuracy and Repeatablity

The Disto E7400X by Leica Geosystems is ISO 16331-1, which is a new industry standard developed by an international committee. The range and accuracy of laser distance meters depend greatly on light conditions and how reflective the targeted surface is. Many distance meters can achieve great results in a controlled laboratory environment, but let's face it, most measuring does not take place in the ideal environment.

Leica worked with external experts to help develop and create a standard by which laser distance meters can be tested and compared with each other.

So, what does all of that mean?
Laser distance meters, like the Disto E7400x that are in accordance with ISO 16331-1 can ensure that it will perform to the specifications listed in real life working conditions.

How do they test the E7400X to ensure compliance?

Measurement under favorable conditions – conditions which often apply for interior use:

-       Weak ambient light (3 klux)

-       Measuring to white painted wall

-       Room temperature

Measurement under unfavorable conditions – conditions which often apply for exterior use:

-       Bright sunshine (30 klux)

-       Measuring to white painted wall

-       Total operating temperature range

Other measuring conditions can also be specified, for example:

-       Measuring to a defined target plate

-       Measuring to unfavorable measuring points with strong or weak reflective (metal surface or wet concrete)

When you're looking for a laser distance meter that is reliable and will give you repeatable, accurate results, it's hard to argue against an international standard.

IP65 Protected from Water and Shock

The Disto E7400x is protected against water, dust and shock with a IP65 protection class rating.

To obtain an IP65 rating, the case must be tight enough to provide complete protection from dust entering any of the electronic components. It also can sustain water projected by nozzle against the enclosure from any direction without harmful effects after 3 minutes of continuous spraying.




The Leica Disto E7400x housing is made up of reinforced fiberglass and solid rubber. Proven in drop tests from 6ft.