Specification sheet
14 Nov 2026
Aczet · Micro Balance
CM Series Micro Balance
The Aczet CM series are micro balances with 1 µg (0.001 mg) readability and capacities from 2 g up to 31 g (models CM 2, CM 5, CM 6, CM 11, CM 21 and CM 31). A two-terminal design keeps the electronics apart from the weighing cell, a motorised internal calibration with Perfect Self Auto Calibration (PSAC) keeps results reliable, and a backlit LCD with push buttons and ten built-in applications keep daily work simple. Suitable for pharma, food, research and testing laboratories.
Overview
The Aczet CM Series Micro Balances are professional-level balances for weighing very small samples with a readability of 1 µg (0.001 mg). Six models, CM 2, CM 5, CM 6, CM 11, CM 21 and CM 31, cover capacities from 2 g up to 31 g, so you can choose the capacity that suits your samples and keep the same simple operation.
Two-terminal design
One part holds the electronics and display, the other holds the precise mechanical measuring cell with its glass draft shield. Separating them reduces the effect of heat from the electronics on the weighing cell. The draft shield parts can be taken apart and put back easily, which makes cleaning simple.
Weighing technology and calibration
High-end Mono-Tech weigh sensor based on electromagnetic force compensation (EMFC).
Fully automatic motorised internal calibration with Perfect Self Auto Calibration (PSAC): the balance calibrates itself when the temperature changes by a set value or after a set time.
Capacity tracker in the display to watch for overloads, and a round bubble level with adjustable feet for quick levelling.
Everyday operation
Bright backlit LCD with large 15 mm digits that stay easy to read in any room lighting.
Ten built-in applications such as density determination, check weighing, totalling, percent weighing and formulation.
Infrared sensor for automatic opening and closing of the glass shield doors, as listed on the datasheet.
Standard RS 232C interface, with an optional USB interface for direct communication with Windows applications such as Microsoft Excel.
Built-in real-time clock for dated GLP records in line with ISO, GLP and GMP practice.
Accessories
An anti-static ionizer (CI-01) removes electrostatic charge from samples and containers, a dot-matrix data printer (CPR 02), anti-vibration weighing table, calibration test weights, a battery backup unit, 21 CFR Part 11 PC software and IQ, OQ and PQ qualification documents are available from Aczet.
Exact values differ from model to model, so the table on this page shows ranges for the whole CM line. Tell our team what you weigh and how much, and we will recommend the right model and share the exact figures from the Aczet datasheet.
Specifications across the series
These are ranges for the whole line. Exact values depend on the model: please check the brochure or ask our team.
| Model | CM 2, CM 5, CM 6, CM 11, CM 21, CM 31 |
|---|---|
| Readability (µg) | 1 (0.001 mg) |
| Weighing capacity (g) | 2 to 31 (CM 2: 2, CM 5: 5, CM 6: 6.1, CM 11: 11, CM 21: 21, CM 31: 31) |
| Repeatability, sd (µg) | 0.7 to 2 (CM 2: 0.7, CM 5 and CM 6: 1, CM 11 and CM 21: 1.2, CM 31: 2) |
| Linearity (±µg) | 3 to 8 (CM 2: 3, CM 5 and CM 6: 5, CM 11: 6, CM 21: 7, CM 31: 8) |
| Tare range (subtractive) | Full capacity (CM 2: -2 g up to CM 31: -31 g) |
| USP minimum weight, typical (mg) | 2 to 4 (CM 2, CM 5 and CM 6: 2, CM 11 and CM 21: 2.4, CM 31: 4) |
| Pan size (mm) | Ø 15 to Ø 30 |
| Response time (sec.) | 8 - 10 |
| Calibration and adjustment | Motorised internal calibration (PSAC, time and temperature controlled) |
| Display | Alpha-numeric backlit LCD, 15 mm digits |
| Unit of measure | g, mg, ct, GN, mo, oz, dwt, t1T, t1H, t1S, mom, Bat, MS |
| Sensitivity drift (ppm/°C) | ± 1 (1 × 10⁻⁶ / °C) |
| Interface | RS 232C (USB, Windows direct communication, optional) |
| Application modes | PCS, % weighing, animal / dynamic weighing, check weighing, automatic density determination, formulation, automatic statistic calculator |
| Operating temperature (°C) | 18 to 30 |
| Power supply | A/C adaptor 230 V or 115 V ± 20 %, 50 - 60 Hz (output 13 V DC / 1.5 A) |
| Compliance | ISO / GLP / GMP |
| Mechanical box, L × W × H (mm) | 360 × 140 × 146 |
| Electronic box, W × D × H (mm) | 240 × 210 × 65 |
Key features
- 1 µg readability Six models, CM 2 to CM 31, read to 1 µg (0.001 mg) with capacities from 2 g up to 31 g.
- Two-terminal design The electronics and display are separate from the mechanical weighing cell, which reduces the influence of heat on the result.
- Automatic internal calibration Motorised internal calibration with Perfect Self Auto Calibration (PSAC), triggered by a temperature change or a time interval.
- Clear backlit LCD Bright display with 15 mm digits, push-button operation and ten built-in applications such as check weighing and percent weighing.
- Easy data transfer Standard RS 232C interface, optional USB with Windows direct communication, and a built-in real-time clock for GLP records.
Key advantages
- Six capacities, one operation Choose from 2 g to 31 g and keep the same easy push-button operation and display.
- Quick weighing Response time is 8 to 10 seconds, so routine weighing does not slow your work.
- Easy to clean The draft shield can be dismantled and assembled easily, which keeps the balance clean.
- Overload awareness A capacity tracker on the display shows how close the load is to the maximum capacity.
- Traceable records The built-in real-time clock and printer option support dated documentation in line with ISO, GLP and GMP practice.