digital protractor

Here is one. You have to read it as it is. The arrow up is positive arrow down is neg.

You can look at many versions if you put in your digital angle guage in amazon and can select and view and go back and select again.....

Martin

My SPI "Mini Protractor" is similar. (I got it from MSC a while back). It has two arrows -- one pointing up on the side that is higher, and one pointing down on the side that is lower. The arrows are very short when it is nearly level (at a minimum, just the arrowhead), and reach full length around 2 degrees.

Mine has four buttons, instead of the two shown in the photo ov the "CMT DAG-001". They are, in order left to right:

"On/Off" "0%" "Calibrate" "Hold"

"On/Off" is obvious

The "0%" is grade in percent.

"Calibrate" lets you define a point as zero degrees.

"Hold" is obvious.

Beware that the magnets like to slip loose and stick to whatever you put it on. I used some Weldwood rubber cement (Or was it Pliobond?) to make them a bit more permanent (after I recovered them from what they had decided to stick to. :-)

Enjoy, DoN.

Thanks Martin. I'll take a look.

Hul

Mart> > Digital angle guage

Don - that sounds identicle to Harbor Freight's, which has the switches and "arrows" you mention but their manual shows a device indicating 45 degrees with both arrows high. Probably didn't want to pay for the two sensors neccessary to show the difference. One question on the SPI device you have: how is the display mode, ie degrees/percentage, indicated?

Hul

D> > > >> Digital angle guage

On 10/11/2014 12:18 AM, DoN. Nichols wrote: ...

...

Oh, sure! I looked at the HF one and its "manual". The manual says that the "0%" button displays the "percentage of angle change" !?!! WTF!

Bob

The arrowheads move from one end to the other of the full-length arrows as you pass through 45 degrees, presumably moving from measuring a horizontal surface to a vertical one.

Sitting here in a Lay-Z-Boy style chair, I can't tilt it precisely enough to get exactly 45 degrees, but it could well be that at that precise angle, both arrowheads are on top -- or both could be on the bottom -- or perhaps it is an artist's conception. :-)

This switches over at 100% (45 degrees) to start counting back down -- using a different edge as the reference I guess. :-)

There is a small circle to the right of the last digit which serves as the degrees symbol, -- or as the upper-left part of the '%' sign if in percent mode. It is clear enough which it is in.

Of course -- it is not as sensitive as the Starrett Master Precision level, but rather convenient for a lot of things.

Enjoy, DoN.

So -- they couldn't say that a 100% grade was when it changed height by the same amount as the horizontal motion (e.g. 45 degrees. :-)

Enjoy, DoN.