Specification sheet
14 Nov 2026
Aczet · Micro Balance
CM-A Series Touch Screen Micro Balance
The Aczet CM-A series are touch screen micro balances with 1 µg (0.001 mg) readability and capacities of 5 g, 6.1 g, 11 g and 21 g (models CM 5A, CM 6A, CM 11A and CM 21A). A 5.7-inch touch screen display, motorised internal calibration with Perfect Self Auto Calibration (PSAC), an infrared sensor for touch-free operation and a built-in real-time clock for GLP records make them practical for weighing filters, pipette checks and small samples in pharma, food, testing and research laboratories.
Overview
The Aczet CM-A Series Touch Screen Micro Balances are made for weighing very small samples with a readability of 1 µg (0.001 mg). The line covers four models, CM 5A, CM 6A, CM 11A and CM 21A, with capacities of 5 g, 6.1 g, 11 g and 21 g. All models share one 5.7-inch touch screen display, so you choose the capacity and not the operating style.
Two-terminal design
The balance has two parts: one housing the electronics and display, and one with the precise mechanical measuring cell and the glass draft shield. Separating them keeps the heat of the electronics away from the weighing cell and its effect on the result, and it lets you place the display where it is comfortable to read.
Sensor and calibration
High-end Mono-Tech weigh sensor based on electromagnetic force compensation (EMFC).
Motorised internal calibration with Perfect Self Auto Calibration (PSAC): when the temperature changes by a set value or a set time has passed, the balance calibrates itself.
Capacity tracker on the display to watch for overloads.
Operation and applications
5.7-inch touch screen display and an infrared sensor: wave your hand to operate the balance without touching it, useful for valuable or toxic samples.
Ten built-in applications such as percent weighing, filling, statistics, check weighing and formulation.
Built-in real-time clock for dated, traceable records in line with ISO, GLP and GMP practice.
Many weighing units, including g, mg, ct, oz, dwt, grain and momme.
Where it is used
Typical work includes filter paper weighing, micro pipette checks, preparing small standards and quality control in the pharma and biotech industry, food and beverages, metals, plastics and electronics, pulp, paper and textile, engineering and testing laboratories.
Accessories
Aczet offers an anti-static ionizer (CI-01), a dot-matrix data printer (CPR 02), an anti-vibration weighing table, calibration test weights, a battery backup unit, 21 CFR Part 11 PC software and IQ, OQ and PQ qualification documents. 21 CFR Part 11 compliance is available on request.
Exact values differ from model to model, so the table on this page shows ranges for the whole CM-A 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 5A, CM 6A, CM 11A, CM 21A |
|---|---|
| Readability (µg) | 1 (0.001 mg) |
| Weighing capacity (g) | 5 to 21 (CM 5A: 5, CM 6A: 6.1, CM 11A: 11, CM 21A: 21) |
| Repeatability (±µg) | 1 to 3, depending on the load range |
| Linearity (±µg) | 5 to 7 (CM 5A and CM 6A: 5, CM 11A: 6, CM 21A: 7) |
| Tare range (subtractive) | Full capacity |
| Min. sample weight as per USP (mg) | 2 to 2.4 (CM 5A and CM 6A: 2, CM 11A and CM 21A: 2.4) |
| Pan size (mm) | Ø 15 to Ø 30 |
| Response time (sec.) | 8 - 10 |
| Calibration and adjustment | Perfect Auto Internal Time & Temp. Controlled Smart Calibration (PSAC) |
| Display | 5.7" touch screen display |
| Unit of measure | g, mg, ct, GN, mo, oz, dwt, t1T, t1H, t1S, mom, Bat, MS |
| Sensitivity drift (ppm/°C) | 2 (2 × 10⁻⁶ / °C) |
| Interface | RS 232C (USB, Windows direct communication, optional) |
| Operating temperature (°C) | 18 to 30 |
| Power supply | A/C adaptor 230 V or 115 V ± 20 %, 50 - 60 Hz |
| Compliance | ISO GLP / GMP |
| Weighing chamber (mm) | Ø 90 |
| Net weight / gross weight (kg) | 10.20 / 14.70 |
| Packing dimensions (mm) | 565 × 565 × 355 |
Key features
- 1 µg readability Four models (CM 5A, CM 6A, CM 11A, CM 21A) read to 1 µg (0.001 mg) with capacities from 5 g up to 21 g.
- 5.7-inch touch screen One touch screen display on every model, with ten built-in applications such as percent weighing, statistics and check weighing.
- Infrared hands-free sensor Operate the balance with a wave of the hand, so valuable or toxic samples are weighed without touching the balance.
- Automatic internal calibration Motorised internal calibration with Perfect Self Auto Calibration (PSAC), triggered by a temperature change or a set time interval.
- Two-terminal design Electronics and display are separate from the mechanical weighing cell, which reduces the effect of heat on the result.
Key advantages
- One display, four capacities Pick the capacity you need, from 5 g to 21 g, and keep the same touch screen operation.
- Fast weighing Response time is 8 to 10 seconds, so a weighing does not hold up your routine.
- Safer for sensitive samples Touch-free sensors reduce the risk of cross-contamination and spills, and the draft shield is easy to clean.
- Traceable records Built-in real-time clock and a printer option support dated GLP documentation.
- Overload awareness A capacity tracker on the display shows how close you are to the maximum load of the weighing cell.