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Jennings JSR-300 Jennings JSR-300 The Jennings JSR-300 - Open And Laying Completely Flat The Jennings JSR-300 - Showing Removable Protective Cover Doubling As An Expansion Tray TThe Jennings JSR-300 - Bottom View The Jennings JSR-300 - Side View

Jennings / JScale JSR-300 Digital Pocket Scale

A New and Improved version of the classic JS-300V
300 gram capacity x 0.1 gram resolution

"In A Nutshell"
Power2 AAA Batteries (included)
Display0.5" red, backlit LCD
Tare FeatureYes
Protective CoverHinged, removable
Calibration FeatureYes
Count FeatureYes
Platform Size2.9" x 2.25"
Scale Size4.9" x 3.25" x 0.9"
Weighing Modes7

Weighing Modes

Mode: GramsCapacity:300.0 gResolution:0.1 g
Mode: OuncesCapacity:10.58 ozResolution:0.01 oz
Mode: GrainsCapacity:4630 gnResolution:1 gn
Mode: CaratsCapacity:1500.0 ctResolution:0.5 ct
Mode: Troy OuncesCapacity:9.64 oztResolution:0.01 ozt
Mode: PennyweightsCapacity:192.9 dwtResolution:0.1 dwt
Mode: CountingCapacity:-Resolution:Pieces

Product Details

It Has WeighMeter™ Technology!If you put too much weight, (more than the capacity of the scale) on any scale it can cause permanent damage. Unfortunately, most scales warn you of an overload after it's too late. Luckily this Jennings scale comes with WeighMeter Technology to tell you when you're coming close to the maximum capacity. This will save you from overloading your scale and damaging it beyond repair.

The Protective Cover Does Double Duty!This scale's unique hinged removable protective cover is great for keeping your scale safe when you aren't using it...and it doubles as a nice expansion tray, increasing the area you have to weigh your stuff on. Since it has edges, you can weigh all kinds of things that might normally roll right off the platform.

Tare FeatureThe tare button on the front of this digital jewelry scale can be pressed to "zero out" the weight on the scale. You can then add more weight, and the display will only show the weight of the items you're adding. This sure is useful when you want to use the cover as an expansion tray to weigh your things, or if you want to get separate weights of multiple items.

It Remembers The Last Unit You UsedIf your application needs weights in the same unit of measurement, (like ounces for instance), it can be a real pain if your scale always turns on ready to weigh in grams. It's a good thing the JSR300 turns on displaying the unit of measurement you were using when you turned it off.

Does This Thing Count?You bet it does! All you need to do is weigh a sample amount of pieces, so the scale can know how much each piece weighs, then start counting. You'll be finished in no time.

Stainless Steel PlatformThis digital pocket scale has a stainless steel weighing platform to make cleanup a breeze. The edge of the platform has a small lip clear around the perimeter of the scale, which helps keep items you're weighing from rolling off the platform. We have a bunch of customers who weigh beads and other small objects, and they just love this feature.

Bright Backlit DisplayThis digital mini scale has a fancy red, backlit display to help you see your weight readings, even in dim lighting.

Easy CalibrationThis scale comes factory calibrated and ready to use. Just in case you need to calibrate it, the JSR-300 comes with easy to follow calibration instructions. You'll just need to pick up a 300 gram calibration weight to get the job done.

Man, This Thing Is Small!You won't have to worry about this little digi scale taking up space. It's just under five inches long, and less than an inch thick! You can take this scale pretty much anywhere you want...stick it in a pack, purse, or in your shirt pocket.

Auto-Off FeatureIf you have ever had the batteries in something run out because you forgot to turn it off, you'll realize what a blessing this feature is. The JSR300 will automatically turn off after a few moments of inactivity, saving battery power and money.

90 DAY MANUFACTURER'S WARRANTY!If you have a problem with this scale, just send it to Jennings' warranty center in Phoenix, Arizona. They'll fix or replace your scale and send it on its way back to you within a week of receiving it. You should expect your replacement to arrive in about two to three weeks from the day you send the original off. Keep in mind that sometimes Jennings runs out of stock, which can cause a delay in the warranty replacement process.

Product Questions

Number of questions: 0

Product Reviews

Overall Customer Rating:
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from 5 customer reviews.
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I purchased this scale for use in baking (weighing the small ingredients like baking soda, salt, etc on this guy is way easier and more accurate) and am loving it. It's compact and easy to use and the lid that you can use as a tray has already come in handy a few times. My only complaint is that the auto off feature is too fast, causing me to start my measurements over again if I'm not right on top of it.
Old Will Knotts is great and I would highly recommend ordering from them too!
Reviewed by: Corey from Denver on 1/11/2021
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scale is perfect and the price is well worth it~my previous one lasted 10 years~
received it in good time~always use the source, avoid amazon~
Reviewed by: ken from on 11/18/2020
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great scale for the price, accurate, weighs in needed categories, received quickly~this company is very customer service minded~does what i need it to do
Reviewed by: ken likavec from hot springs nc on 6/26/2013
Good buy
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Needed portability so I got the JSR300. It's dead on accurate out of the box. I compared it to my Ohaus 3-beam and its highly accurate. Also 10, 20, 50, and 100g cal weights say its dead-nuts accurate.
Reviewed by: Wayne Grow from Southeast Georgia USA on 4/25/2013
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I have wanted a scale for many years, and am very pleased with this one. It is very accurate. I can weigh my med.mj, and a ring that was handed down from my Dad. High quality. Fun to use.
Reviewed by: Jeffrey Schmaltz from Pueblo Colorado on 3/5/2013

We know you have a choice when you buy scales online. Just know that when you buy digital scales from Old Will, it's always a "Worry Free Deal".

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