Trena Laser Ultrasonic Electronics

This was one of my first purchases in China! It's been so long, I don't even remember most of my electronic measuring tape.

Here in Brazil a measuring tape as this costs more than $ 200, But Chinese websites is for only about U 15. Worth that much to the shame that I sell some!

She works as follows: you point to a wall, you need to be 90 degrees of appliance, and it records the distance to the location.

There is also option to measure area and volume, and for both uses the keys M1, M2 and M3. To calculate area is measured, for example, the length of a room and press M1 and Store. Then measure the width of this same room and press M2 and Store. After that, When you press the “AREA” the meter will automatically calculate the area of the environment. To measure volume do the same process by adding in M3 measure the height of the room, pressing “VOLUME” then.

To measure the device relies on the ultrasound transmitter shown in photo below. It emits a high frequency sound wave that reflects in a bulkhead (a wall, for example) and returns to the device. And the propagation speed of sound and the time it took to return to the unit knows, approximately, the distance to the bulkhead.

The shortest distance that can be measured is about 50 cm, While the largest is 20 m.

One can also measure in feet (feet) In addition to meters.

The appliance has a laser powerful enough, but that is not used to do the actual distance measurement. Use the laser as mira to know what point the wall is being used to measure.

The measuring tape works with a 9V battery, that lasted more than a year even after multiple measurements.

Is a great tool for professionals who make measurements of indoor environments as Joiners, Masons or even brokers. I've done several difficult measurements with this equipment, It certainly worth the price. Those interested can purchase it on the site or in DealExtreme TinyDeal.

http://dx.com/p/60ft-ultrasonic-tape-measure-with-laser-pointer-2153?Utm_rid=32082367&Utm_source=affiliate

http://www.tinydeal.com/waterproof-lcd-ultrasonic-distance-measurer-area-volume-calculator-with-laser-pointer-hui9066-p-8833.html