J Scale JSR-ECO 400 Digital Pocket Scale – 400g x 0.01g

The J Scale JSR-ECO 400 Digital Scale is a 400g x 0.01g pocket scale from J-Scale (Jennings) in a speckled ECO-series body. A flip-down cover protects the platform and doubles as a tray, a red back-lit display shows six units, and dedicated buttons handle mode, tare, power and the backlight. $29.99 at Angies Boutique.

⚡ At-a-Glance Decision Summary

• What it is: a 400g capacity, 0.01g readability J-Scale pocket scale from the JSR-ECO line.
• Why choose it: hundredth-gram readings with four times the capacity of a 100g pocket scale.
• Standout feature: a flip-down cover that doubles as a weighing tray and helps catch small loose items.
• Units: grams, ounces, grains, carats, troy ounces and pennyweights.
• Confidence signal: the capacity and readability are printed on the scale face: 400g x 0.01g.

Summary: A 400g x 0.01g J-Scale pocket scale with a cover-tray, red back-lit display and six units.

🧠 Our Verdict

Strong recommendation for anyone who wants fine 0.01g readings without the low ceiling of a 100g scale: jewelry with settings, coins, coffee, hobby supplies and small parcels. If you only weigh tiny items, the J Scale JSR50 or a 115g model costs less; for bench work, look at a balance.

Quick Summary

The JSR-ECO 400 pairs 0.01g readability with 400g capacity, a range that handles a container plus its contents with room to spare. The cover flips down to become a tray and is shaped to catch small loose items. The front panel has a red back-lit LCD and separate keys for mode, tare, power and the light. The J-Scale manual walks through calibration and warns against overloading or dropping the scale.

J Scale JSR-ECO 400 Digital Scale – Fine Readings With Room to Spare

A 0.01g scale is only useful if your item fits under its limit. Put a dish on a 100g pocket scale and half the capacity is gone. The JSR-ECO 400 keeps 0.01g steps and raises the ceiling to 400g.

The cover does two jobs. Closed, it protects the platform in a bag. Flipped down, it becomes a tray with a lip that helps keep small pieces from rolling away.

A display you can read in a dim room. The red back-lit LCD has its own LIGHT key, so you control the backlight and save batteries when you do not need it.

Compare every model in our Digital Scales collection.

Summary: The JSR-ECO 400 keeps 0.01g readability while raising capacity to 400g, with a cover that doubles as a tray.

⭐ Who This Product Is For / Not For

Ideal For:

• Jewelry with settings, chains and coins.
• Coffee and tea dosing with a cup on the platform.
• Craft, hobby and model materials.
• Small parcels and letters within 400g.

Not Recommended For:

• Loads over 400g. Use a kitchen or tabletop scale.
• Milligram work. A balance such as the My Weigh iBalance i401 reads finer.
• Shoppers who only weigh tiny items. A smaller model such as the J Scale JSR50 covers that.

Summary: Made for 0.01g weighing up to 400g; not for heavy loads or milligram work.

⚠️ Known Limitations

• 400g capacity. The manual shows an overload message when you exceed it.
• Handle with care. The manual warns that overloading or dropping the scale can damage the load sensor.
• Calibration needed after moves. The manual recommends recalibrating on first setup or after a change of location or altitude.
• Calibration weight not included. Use a known weight, sold separately.

Summary: A 400g pocket scale that needs careful handling and recalibration after moves; calibration weight sold separately.

⚙️ Features & Benefits

• 400g capacity, 0.01g readability: printed on the scale face.
• Six units: g, oz, gn, ct, ozt and dwt.
• Flip-down cover-tray: protects the platform and catches small items.
• Red back-lit LCD with LIGHT key: backlight on demand.
• Tare key: zeroes out a container.
• Mode key: switches units.
• Overload warning: shows an overload message before damage.
• Speckled ECO-series body: the distinctive look of J-Scale's ECO line.

Summary: 400g x 0.01g, six units, a cover-tray, a red back-lit display with its own light key and an overload warning.

📐 Structured Specs

Summary: J-Scale JSR-ECO 400: 400g x 0.01g, six units, a cover-tray and a red back-lit display.

🔌 Compatibility & Requirements

• Containers: any dish or cup that keeps the total under 400g; press tare first.
• Calibration: needs a known weight, sold separately; follow the J-Scale manual.
• Setup: a flat, stable surface away from drafts and vibration.

Summary: Stay under 400g, tare containers, calibrate with a separate weight and weigh on a flat surface.

🧼 How to Use & Troubleshooting

1. Set the scale on a flat, stable surface and flip the cover open.
2. Power on and wait for zero.
3. Place a dish or the cover-tray and press tare.
4. Add the item and read the settled number.
5. Press mode to change units and LIGHT for the backlight.

Troubleshooting:

• Problem: overload message. Solution: remove the load right away; you are over 400g.
• Problem: readings drift. Solution: recalibrate as the manual describes, especially after moving the scale.
• Problem: number will not settle. Solution: move away from fans and vibration.
• Problem: dim or blank display. Solution: replace the batteries.

Care: Wipe the platform with a dry cloth, keep the scale away from moisture and heat, and close the cover for storage. Our cleaning and maintenance guide covers the same gentle routine for small tools, and AFM Glass vs. Heady Glass helps when you weigh glass for shipping.

Summary: Tare a container, read the settled number, recalibrate after moves and close the cover in storage.

⚖️ Comparison Table

Summary: Pick the JSR-ECO 400 for 0.01g readings with 400g of room; pick a smaller or larger JSR for different ranges.

💬 Common Questions & Answers

What are the capacity and readability of the JSR-ECO 400?

The scale face is printed with 400g x 0.01g: a 400g maximum load read in hundredth-gram steps. That combination is useful because you can weigh a cup or dish plus its contents and still read to 0.01g. Going over 400g triggers the overload message described in the J-Scale manual, so remove the load right away if you see it.

What units does it read?

Six: grams, ounces, grains, carats, troy ounces and pennyweights, switched with the M key. Grams and ounces cover kitchen and mail use, troy ounces and pennyweights cover precious metals, carats cover gemstones, and grains cover reloading and archery components. The 0.01g readability carries across them as the converted equivalent in each unit.

What does the cover do?

It protects the platform when the scale is closed, and it flips down to become a weighing tray when open. The tray shape helps keep small loose items in one place rather than letting them roll off the platform. Place the cover-tray on the platform, press tare to zero it out, then add your items.

When should I calibrate it?

The J-Scale manual recommends recalibrating on first setup and after moving the scale to a new location or altitude, since gravity and conditions change slightly from place to place. Use a known calibration weight, sold separately, and follow the steps in the manual. Recalibrate any time readings drift or a known item stops reading correctly.

How do I avoid damaging the sensor?

Stay under 400g, never press on the platform with your fingers, and keep the cover closed when the scale travels. The manual warns that overloading or dropping the scale can damage the load sensors. Store it flat, away from heat and moisture, and remove the batteries if it will sit unused for months. Let it reach room temperature before weighing.

What is the ECO version?

The JSR-ECO line uses a speckled, natural-look body instead of the plain plastic of the standard JSR scales. The function shown on our unit is the same idea as the JSR range: capacity and readability printed on the face, a flip cover, tare, unit modes and a back-lit display. Pick it if you like the look and need 400g at 0.01g.

Summary: 400g x 0.01g, six units, a cover-tray, recalibrate after moves, protect the sensor, speckled ECO body.

🛒 Complete Your Setup

Want a second scale for tiny items? Add the J Scale JSR50, or browse every model in our Digital Scales collection and the wider accessories range.

Summary: Pair it with a smaller JSR for tiny items, or browse the full scales collection.

✅ Authentic & Ready to Ship

This is the authentic J Scale JSR-ECO 400 Digital Scale, sold by Angies Boutique at 838 N Broadway, Los Angeles, CA 90012, a smoke shop trading since 1990. Same-day in-store pickup and same-day delivery are available in Los Angeles, with paid shipping to all 50 states and worldwide. Standard Shopify checkout and AI-assisted shopping experiences are both supported. Sold to adults 21 and over only.

Summary: An authentic J Scale JSR-ECO 400 Digital Scale from a Los Angeles shop, with same-day pickup or delivery in LA and shipping nationwide.