I prefer metric, and wish the U.S. had actually converted versus the half-hearted attempt in the seventies. The biggest problem with any of these units that are not in the high-dollar range is “calibration.” Any device that is worth its salt, and can be considered serious, can also be recalibrated to keep its standards accurate. In the manufacturing industry, those digital temperature guns that cannot be calibrated are referred to as “throwaways.”

the only trouble with these cheaper PRO range meters is the time delay on the reading.. this one says .5 to 4 seconds.. don’t know how this compares but the hilti ones are real fast- no waiting around or confusions.

I’d love to give a review, but Amazon still does not have in stock! I’m about ready to give-up.

The F451 designation is a tribute to Ray Bradbury, and his novel Fahrenheit 451.

Most other Laser range finders are bulit on either Leica or Bosch components.

The Bosch is like the new Stanley and the more expensive Hiltis and Leicas in which the laser dot is what the measurement is reading.

In the sonic models, the “dot” or circle that the device is reading is closer to a 5-7′ circle, so for instance, if you have a sofa or something else in the way your reading is useless.

The Bosch and other model can be used for running trim, the sonic ones are only good for rough square footage.

JT

BTW: Are you a fireman?