KERN KERN ACJ
KERN analytical balances with 0.1 mg readability and automatic internal adjustment, with capacities from 82 g to 320 g and optional metrological verification.
ACJ is the KERN series of analytical balances with a single-cell weighing system and a readability of 0.0001 g (0.1 mg). The balance adjusts itself, using the internal weight, at a temperature change of at least 2 °C or every 4 hours, which reduces the influence of the place of use on accuracy. It has a glass draft shield, a stainless steel pan with a diameter of 91 mm, an LCD display with 14 mm digits and RS-232 and USB interfaces; its functions include piece counting, summing the ingredients of a recipe, determining density and percentages, and tolerance weighing.
The model is chosen by capacity: ACJ 80-4M (82 g), ACJ 100-4M (120 g), ACJ 200-4M (220 g) and ACJ 300-4M (320 g), all with the same readability, linearity of ±0.0003 g and repeatability of 0.0002 g. For a quotation please send us the model or the capacity required and state whether the balance must be metrologically verified or DAkkS calibrated. When the item is available locally or at the supplier, delivery takes 24–72 h, and to order, usually 1–4 weeks.
Models and codes
| Code | Note |
|---|---|
| ACJ 80-4M | Capacity 82 g, readability 0.0001 g, verification scale interval 0.001 g, minimum load 0.01 g. |
| ACJ 100-4M | Capacity 120 g, readability 0.0001 g, linearity ±0.0003 g, repeatability 0.0002 g. |
| ACJ 200-4M | Capacity 220 g, readability 0.0001 g, pan Ø 91 mm. |
| ACJ 300-4M | Capacity 320 g, readability 0.0001 g, pan Ø 91 mm. |
Key specifications
| Maximum capacity | 82 g – 320 g |
|---|---|
| Readability (d) / verification scale interval (e) | 0.0001 g / 0.001 g |
| Repeatability / linearity | 0.0002 g / ±0.0003 g |
| Adjustment | internal, automatic at a temperature change ≥ 2 °C or every 4 h; manual, with internal weight |
| Pan / weighing chamber in draft shield (L × W × H) | inox, Ø 91 mm / 174 × 162 × 227 mm |
| Interfaces | RS-232, USB-Device |
| Stabilisation time / warm-up time (ACJ 100-4M) | 3 s / 8 h |
| Ambient temperature | +10…+30 °C |
The KERN product brochure for ACJ 100-4M is dated 10.10.2026 and lists 4 ACJ models, with no mention of discontinuation.
Frequently asked questions
When does an ACJ balance adjust itself?
At a temperature change of at least 2 °C or, at intervals, every 4 hours, using the internal weight. Adjustment can also be started manually. For ACJ 100-4M, the adjustment weight recommended by KERN is 100 g, class E2, for example 316-07.
Can an ACJ balance be metrologically verified after it has been delivered?
No. Initial verification under NAWI 2014/31/EU (KERN service 965-201) must be included in the order, together with the full address of the place of use.
What details do you send us for a quotation on an ACJ balance?
The full code (for example ACJ 100-4M) or the capacity you need, whether the balance must be metrologically verified or DAkkS calibrated, and the accessories wanted, for example the printer or the density set.
Other KERN series
DAkkS calibration and metrological verification are separate KERN services, which we include in the quotation on request; we do not calibrate or install the balance at your premises.
Updated: 2026-11-12