Sangabery Digital Caliper, 0-6 inches Caliper with Large LCD Screen, Auto - Off Feature, Inch and Millimeter Conversion Measuring Tool, Perfect for Household/DIY Measurment, etc

Good Products

Good value. I bought 2. They are consistent with each other and tested accurate at various ranges. Each one came with one battery already installed, and a pack of 2 spares. Comments: Strangely, the battery department requires a Phillips head screw driver. It is included. Be very careful not to lose these extremely tiny screws. Hint: Before using - always push the slide closed, take your finger off the slide, and then press the ZERO button to calibrate the readout. Hint: These are made from carbon fiber infused plastic. They are very sturdy, but they can flex. When measuring, do not use too much force or you can alter the reading. Hint: When the calibers are totally closed at 0.00, note the gap at the top of the measuring faces. They touch on the lower 3/4ths of the faces. When measuring, be sure to use the lower part. If you measure in the upper gap, you'll be off by about .04". ********** Accuracy testing: There is nothing more in this review except for technical details of the accuracy tests. Don't bother reading unless you are into this sort of thing. The accuracy tests had excellent results. The precision is supposed to be .01". I found they were about 10 times that accurate at about .001. That's as far as I can test with a readout that only goes to 2 decimal places. I used a set of Grade A2 precision gauge blocks to test. They are factory certified to be within 0.0002". For the .01 resolution of these calibers, these gauge blocks are WAY overkill. But I have them sitting here, so ... See the attached photos for measurement examples. Most of the measurements photographed were taken with the blocks left in the case, so the measurement shown in the case below them match the block used On a couple, I had to reposition. On these you can see the empty slot to the right under the caliber and read the measurement there. Sorry for the focus, I was hand-holding the phone. To make the numbers show, I was also hand-holding a flashlight. Most turned out OK, but at least one turned out pretty fuzzy. All measurements were done holding them properly with any multiple block wrung together. Only the photographed ones were done a bit sloppy. Luckily, at a resolution of .01, they could be sloppy and still be accurate. Very different from my normal measuring. To test for accuracy, test what a known item measures. Then, also test to see at what point a number rounds up. Then do these tests a various places along the slide. I tested 4", 2": 1" and .05". Then I tested to see where it rounds down/up. .105 measured as .10" .106 measured as .11" So, the rounding happened at precisely halfway between .10 and ,11. Perfect. Way better than the specs. Within .001 for a stated resolution of .01. Very good. In another set of tests (not photographed), I took the 4,2, and1" blocks and tested each with the addition of the .105, .106 blocks. They all rounded at the same place.

same product as i was expecting .

The caliper does its job. Althought this may not be the best caliper on the market, it is more than sufficient for the typical hobbyist/3D modeler. The only problem that I have had whilst using this caliper would be that the mechanism tends to become slightly stiff if not stored in a dust-free environment.

Very accurate, very lightweight, great for what I need it for - mostly household and random works with my cars and bikes.