Water Activity Meters

The water activity meter allows you to assess the properties of the tested substance. The determined parameter aw determines the ratio of the vapor pressure over the product to the pressure over clean water, and the use of a hermetic chamber accelerates the achievement of hygroscopic equilibrium.

Devices operating on the basis of the PN-ISO 21807:2005 standard  focus on chemically unbound water, which is crucial for maintaining microbiological stability. The use of advanced solutions such as the WATERLAB system ensures measurement accuracy of only ±0.003 aw, which translates into numerous benefits:

• accurate and repeatable measurements,
• limiting the growth of microorganisms,
• extending the shelf life of products,
• Fast readings thanks to dew point technology.

In the food and pharmaceutical industries, a cooled mirror has become the standard, which provides smooth and reliable quality control. This makes production processes more predictable and safe for the consumer.

Portable AV Meters and Benchtop Analyzers

The choice of the right equipment depends primarily on the specifics of the workplace. In professional laboratories, stationary models such as the AQUALAB 4TE, which combine multi-channel accuracy with convenient operation, will be perfect. On the other hand, where mobility is key,  the AQUALAB PAWKIT portable meter will come in handy, allowing for instant verification of parameters directly on the production line. Modern measurement systems automate the flow of information and streamline everyday work thanks to features such as:

• multi-channel precision and measurement stability,
• intuitive operation via touch panels,
• fast data transfer via Bluetooth or USB,
• automatic generation of reliable quality reports,
• convenient wireless charging functions,
• intelligent alarm systems that watch over the correct operation.

Stability of results in any environment is guaranteed by dedicated stands and humidity recorders cooperating with them. This combination of tools ensures that each analysis maintains the consistency of the results.

Capacitive sensors and dew point measurement

Choosing the right analyzer involves deciding between capacitive sensors and an advanced dew point mechanism. The first technology is based on polymer sensors, which, reacting to water molecules, accurately determine the relative humidity of the material. The AQUALAB 4TE uses a cooled mirror technique to determine the condensation temperature and calculate the water vapour pressure. This apparatus is distinguished by the following features:

• detailed determination of material moisture parameters,
• using advanced cooling mirror technique,
• effective protection against chemical contamination,
• achieving full thermal balance of measurement,
• complete resistance to external magnetic fields,
• Stability of operation in various environmental conditions.

Immunity to interference affects the stability and durability of the AQUALAB 4TE system.

TDL laser technology for volatile samples

Many products with complex compositions contain alcohol or intense aromas that can effectively interfere with traditional sensors. In situations where standard methods fail, modern TDL laser technology is a reliable solution. The AQUALAB TDL2 uses a diode that emits a beam of light of a specific wavelength, which allows it to identify only water molecules, minimizing the impact of other volatile substances. The use of a laser in the analysis of water activity provides users with a number of important benefits:

• complete elimination of errors caused by ethanol,
• error-free determination of the level of unbound water,
• advanced test temperature control system,
• tight closure protecting the structure of the material,
• Highest accuracy even with demanding samples
• full reliability of results in products with a specific recipe.

With this technology, the measurement becomes free of chemical interference and fully reproducible. The use of a laser beam is now an effective solution for obtaining reliable data in the quality control process of products with a rich and demanding composition.

Fast measurement in quality control

Short measurement times are important in quality control, which is why AwQuick technology allows you to get results in minutes.   By replacing traditional, time-consuming procedures, this solution facilitates ongoing monitoring and full automation of production lines while maintaining high repeatability. In the food and pharmaceutical industries, the AQUALAB VSA analyzer  enables the tracking of sorption isotherms. The use of this advanced device allows you to:

• accurate prediction of the product's reaction to moisture,
• effective prevention of clumping problems,
• optimization of the stability and durability of the goods,
• shortening the time needed for development research,
• raising general standards of production safety.

The reliability of the instrument depends on regular calibration using certified standard salts. Such care for the sensors effectively eliminates the risk of errors and guarantees full compliance with applicable standards, which directly translates into the reliability of each analysis performed.

Meters for the Food and Pharmaceutical Industry

In the food industry, measuring equipment supports the quality control of raw materials and finished products, which is crucial for reliable quality control of raw materials and finished products. Accurate monitoring of physicochemical parameters, and in particular water activity (aw), allows for:

• effective inhibition of undesirable chemical processes,
• maintaining the perfect taste and texture of products,
• ensuring the microbiological stability of bulk materials,
• protection of active substances against degradation in pharmacy,
• dynamic improvement of recipes in the cosmetics industry,
• optimization of complex packaging and logistics steps.

In the pharmaceutical sector, testing the level of unbound water is the foundation  for assessing the stability of medicines. Thanks to modern surveillance systems, manufacturers gain control over the stability of the composition throughout the shelf life. Similar standards of precision are implemented in cosmetics, where accurate measurements translate into higher production efficiency and excellent quality of the final product.

Calibration of devices with standard salts

The procedure uses a multi-point method and certified standards. Devices such as the Lab Master Neo take the rest of the user – the RFID system  recognizes the type of salt itself. This saves time and protects against mistakes. Systematic calibration is provided by the laboratory:

• compliance with ISO 17025,
• high accuracy of measurements,
• elimination of sensor wear errors,
• reliability of research data ,
• automatic identification via RFID,
• precision of analyses over the years.

The result of the process is a calibration certificate. Apart from documentation, ongoing parameter control is crucial. Attention to detail ensures that the results are always reliable.