KERN ACS Analytical Balances

Professional Analytical Balances with External Calibration

Professional analytical balances for laboratories with flexible calibration procedures

KERN ACS analytical balances are designed for laboratories that require outstanding weighing accuracy while preferring the flexibility of external calibration. Combining advanced Single-Cell technology, electromagnetic force compensation and external adjustment using certified calibration weights, the ACS series provides dependable analytical weighing for research laboratories, pharmaceutical companies, universities and quality control departments.

The ACS range is ideal for laboratories that prefer to integrate calibration procedures into their own quality management systems while benefiting from modern weighing technology and fast measurement performance.

Why choose a KERN ACS analytical balance?

Every laboratory follows its own quality procedures and calibration routines.

For many laboratories, external calibration offers the flexibility to perform adjustment using certified reference weights according to internal working procedures.

KERN ACS analytical balances combine this flexibility with advanced weighing technology, offering:

Single-Cell weighing technology
External calibration
Electromagnetic force compensation
Fast stabilisation
Excellent repeatability
GLP-compliant data output
USB and RS-232 interfaces
Precision glass draft shield
Robust laboratory construction

The result is a professional analytical balance designed for laboratories requiring both precision and flexibility.

External calibration – Flexible adjustment using certified reference weights

One of the defining characteristics of the KERN ACS series is its external calibration concept.

Instead of using an integrated calibration weight, the balance is adjusted using an appropriate external reference weight selected by the laboratory.

This approach allows laboratories to integrate calibration into their own operating procedures while maintaining complete control over the adjustment process.

External calibration offers several practical advantages:

Flexible calibration scheduling
Use of certified reference weights
Integration into existing laboratory procedures
Transparent adjustment process
Reliable long-term weighing performance

Many professional laboratories deliberately choose externally calibrated analytical balances because they fit naturally into established laboratory routines and quality systems.

Optional DAkkS calibration certificate

Many laboratories require documented calibration for quality assurance purposes.

For this reason, all KERN ACS analytical balances are available with an optional DAkkS calibration certificate.

Before delivery, the balance can be calibrated by an accredited calibration laboratory. The measured values are documented in an official calibration certificate with traceability to national and international standards.

Benefits include:

Accredited DAkkS calibration
Calibration certificate supplied with the balance
Traceable measurement results
Support for laboratory quality procedures
Ready for immediate professional use

Our recommendation is to order your KERN ACS balance with the optional DAkkS calibration certificate so that it is ready for documented laboratory applications immediately after delivery.

Single-Cell technology – Precision engineered from a single aluminium block

The heart of every KERN ACS analytical balance is its advanced Single-Cell weighing cell.

Unlike conventional weighing systems assembled from multiple mechanical components, the complete weighing cell is machined from a single solid aluminium block.

This monolithic construction minimises mechanical tolerances, internal material stresses and assembly-related inaccuracies.

The result is exceptional weighing performance characterised by:

Outstanding measurement accuracy
Excellent repeatability
Very fast stabilisation
Outstanding long-term stability
Reduced sensitivity to temperature changes
Minimal mechanical wear
Consistent weighing performance

For laboratories processing large numbers of samples, Single-Cell technology significantly reduces waiting times while maintaining the highest measurement quality.

Electromagnetic force compensation

KERN ACS analytical balances use electromagnetic force compensation, the internationally recognised weighing principle used in professional analytical balances.

This technology provides:

High measurement resolution
Exceptional repeatability
Fast response times
Stable long-term accuracy
Reliable weighing of even the smallest samples

Combined with the Single-Cell weighing cell, electromagnetic force compensation delivers dependable analytical weighing performance throughout the lifetime of the instrument.

Fast stabilisation for efficient laboratory workflows

Accurate weighing should also be efficient.

Thanks to the advanced weighing technology, KERN ACS analytical balances produce stable weighing results within only a few seconds.

This enables laboratories to:

Process more samples
Reduce waiting times
Improve workflow efficiency
Increase laboratory productivity

Even small time savings become significant when hundreds of samples are weighed every day.

Glass draft shield for reliable analytical weighing

Air movement is one of the most common causes of unstable analytical weighing.

The precision glass draft shield protects the weighing chamber against:

Air drafts
Ventilation systems
Air turbulence
External disturbances

This helps maintain stable weighing conditions while allowing comfortable access through sliding glass doors.

GLP-compliant documentation

Reliable laboratory documentation is essential for modern quality systems.

KERN ACS analytical balances support GLP-compliant data output, allowing laboratories to document:

Weighing results
Date and time
Instrument identification
Calibration information

Electronic documentation improves traceability while simplifying internal laboratory procedures.

Digital connectivity

Depending on the model, communication interfaces include:

USB
RS-232

These allow direct communication with:

Laboratory software
Computers
Printers
Documentation systems

Digital data transfer reduces transcription errors and improves process reliability.

Built for professional laboratories

The ACS series has been engineered for continuous laboratory operation.

Its robust construction includes:

Single-Cell weighing technology
Glass draft shield
Adjustable levelling feet
Integrated spirit level
Durable mechanical construction

These features ensure reliable performance throughout many years of professional laboratory use.

Typical laboratory applications

KERN ACS analytical balances are widely used in:

Chemical laboratories
Pharmaceutical laboratories
Research laboratories
Universities
Quality control laboratories
Food laboratories
Environmental laboratories

Which KERN ACS analytical balance is right for your laboratory?

Important selection criteria include:

Maximum weighing capacity
Required readability
Sample characteristics
Laboratory documentation requirements
Communication interfaces
Future laboratory applications

Selecting the right model ensures efficient workflows and reliable analytical performance.

Why choose a KERN ACS analytical balance?

The KERN ACS series combines advanced Single-Cell technology, electromagnetic force compensation and the flexibility of external calibration in a professional analytical balance.

Its precision-engineered weighing cell, machined from a single aluminium block, provides exceptional weighing quality, rapid stabilisation and long-term reliability. Together with GLP-compliant documentation, optional DAkkS calibration and modern connectivity, the ACS series is an excellent choice for laboratories seeking precision, flexibility and dependable performance.

Frequently Asked Questions

Why does the KERN ACS use external calibration?

External calibration allows laboratories to perform adjustment using certified reference weights according to their own operating procedures.

Is external calibration less accurate than internal calibration?

No. When performed correctly using suitable reference weights, external calibration provides the same high level of weighing accuracy.

What is Single-Cell technology?

The weighing cell is machined from a single aluminium block, providing exceptional measurement quality, excellent repeatability and outstanding long-term stability.