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Product Description


Models Number


Weighing capacity

5.1 g / 22 g **

Minimum weighing value

0.001 mg / 0.01 mg

Repeatability/Std Dev

0.004 mg (for 1 g) / 0.01 mg


±0.010 mg / ±0.02 mg

Stabilization Time (set to FAST)

Approx. 10 secs / 8 secs

Sensitivity Drift (10°C-30°C)

±2ppm/°C (when automatic self calibration is not used)

Operating temperature

5°C to 40°C (41°F to 104°F), 85%RH or less (non-condensing)

Display Refresh rate

5 times / second or 10 times / second

Measurement Units (Display mode)

g, mg, oz, ozt, ct, momme, dwt, GN, tael, tola, messghal, pieces (counting mode), % (percent mode), Specific gravity

Counting mode

Minimum unit mass = 0.1mg / Number of samples = 10, 25, 50 or 100 pieces

Percent mode

Minimum 100% ref. mass = 10.0 mg / Minimum 100% display = 0.01%, 0.1%, 1% (depends on the reference mass stored)

Internal Memory

200 sets weighing data / 100 sets with date & time / 50 sets of calibration data

External Data Logger

Store up to 5,000 weighing results with date & time to AD-1688 (standard)

Data Output

2GLP / GMP / GCP / ISO compliant. Outputs: balance manufacturer, model, s/n, balance identifi cation number, data, time of calibration, mass used, and space for signature.

Standard interface

RS-232C, Quick USB, External key plug for optional foot switch (SW:128)

Internal Calibration

Motor-driven internal calibration

External Calibration masses (g)

20, 10, 5, 2, 1

Ionizer electrode pin life

Approx. 10,000 hours of continuous use. (User replaceable)

Weighing pan diameter

25 mm (50 mm, 95 mm for weighing filters)

Power consumption

Approx. 30 VA (supplied by the AC adapter)

External dimensions / Weight

259 (W) x 466 (D) x 326 (H) mm / Approx.

Standard accessories

AC adapter

Instruction manual


Weighing Data Logger (AD-1688)

Long Tweezers for calibration mass (AD-1689)

Standard Tweezers. BM-20/22 also includes two filter weighing pans

microfuge holders and 3 sizes of disposable pans.


* Tips on getting accurate quotes. Please include product name, order quantity, usage, special requests if any in your inquiry.