(Full specifications included below.)
I chose this scale because I wanted an inexpensive, compact scale with a high capacity and at least 0.1g accuracy, and because the reviews looked good. I intend to use the scale mostly for weighing small bubble-wrap mailing envelopes and small shipping boxes, but I will sometimes need to weigh herbal supplements, and I need those weights to be accurate to a tenth of a gram or so. I was not sure if a scale with such a high capacity would be sensitive enough to measure small changes in weight, such as when I add a tenth of a gram of herbs to the weighing platform, so I also bought American Weigh's Chrome-201 (200g x 0.01g). With its help, I conducted some tests.
This scale does sometimes report 0.1g changes in weight, but not reliably. It usually requires a 0.2g cumulative change to update the reading, unless I press on the scale or lift and replace the weight, which causes the reading to update and reflect the 0.1g change. The scale does reliably detect 0.2g changes in weight, even when that weight is added very gently and gradually. This is true whether the starting weight is near zero or near 1000g. The scale cannot detect a total weight of less than 0.2g (this is listed in the specifications). The work-around is to use a tray and zero-out its weight with the Tare feature. This scale has an "acceptable tolerance" of 0.2g, so that is probably the reason for these behaviors.
I conducted my tests using powder (gently sprinkled), an eye dropper of water, and shreds of paper. I verified the readings with the Chrome-201. Both scales seem to be accurately calibrated, and usually gave matching readings (though they were sometimes off by 0.1g). The Chrome, by the way, exhibits the same behavior of updating the reading typically only when the weight has changed by at least 2 increments (0.02g in that case), and it only reliably detects a total weight of at least 0.05g.
I have a few minor problems with this scale. See the CONS section below.
AWS Blade-1kg Specifications:
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Max Capacity: 1000g
Min Weight: 0.2g
Units: gram, ounce, troy ounce, pennyweight
Acceptable Tolerance: 0.2g
Calibration Weight: 500g (the manual and the scale itself reported this, and I successfully performed the calibration)
Recommended Accuracy Class: OIML M2
Power: 2 x AAA (included - be sure to remove the plastic tab between the batteries and the contact)
Dimensions: 0.8" x 3.8" x 3.8"
Platform Dimensions: 2.7" x 2.7"
Made in China
PROS:
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Seems accurate, both by comparing to the CHROME-201 scale (readings usually match, or are sometimes off by 0.1g), and by weighing US coins. Readings are also reasonably consistent.
The case and lid make good trays, and the case (being taller) can serve as a standoff for large items that would otherwise obscure the readout.
Seems sturdy and the build quality seems good (for a cheap scale).
CONS:
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The bottom tray/case fits so snugly that I can remove the scale from it only by holding the case and striking the heel of my hand sharply against a firm surface to knock the scale out of it into my other hand. I do not like doing that with something so delicate.
The top tray/lid does not protect the weighing platform from pressure. It fits right against the platform and the scale will report weight when I press moderately firmly on the lid, even near its corners. And even though the lid fits within the bottom portion of the case, it sits higher than the top of the case and so even the case will not protect the scale from things being set on top of it.
The swing-out unit would be better if it could swing out all the way so that it would be less easily obscured by large objects on the scale.
When testing the scale's ability to detect tiny changes in weight, I found that the auto-off will activate even when there are small (0.1 - 0.2g) changes being reported in the readout at least every ten seconds. I assume this is because the scale has a tolerance of 0.2g, and so changes by no more than this do not count in the software as activity. I can prevent this by pressing on the scale periodically.
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AWS Blade Series
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Reviews with images
so it is optimal for measuring fine grains of salt and for measuring ounces of hops ...
I purchased this scale to measure brewing salts for homebrew applications. It measures on a tenth scale, so it is optimal for measuring fine grains of salt and for measuring ounces of hops to the tenth of a degree. It has a little flip out display, which is pretty cool. The backlit display is bright to read in almost any lighting condition. Someone had mentioned that is wasn't calibrated, but after a quick TARE and placing a 50G weight on it, it was perfectly calibrated. No need to do anything different. Great little scale for small weight applications. I highly recommend!
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