Water activity and moisture content detector

1、 Product Introduction

In the fields of food, medicine, cosmetics, and agricultural products, water activity (aw) and moisture content are two core parameters that determine product stability, shelf life, microbial safety, and sensory quality. Although moisture content reflects the total amount of water in a sample, what truly affects microbial growth, chemical reaction rate, and physical stability is the "availability" of water - that is, water activity. For example, if two products with similar water content have different water activities, their decay rate may vary greatly. Therefore, measuring only water content is not sufficient to comprehensively evaluate product safety, and measuring water activity alone is difficult to guide drying or rehydration processes. Only by synchronously and accurately measuring water activity and moisture content can a complete basis be provided for formula design, process optimization, shelf life prediction, and quality control.

To this end,Water activity and moisture content detectoremerge as the times require. This instrument integrates high-precision capacitive/resistive water activity sensors and a fast halogen heating weighing system (or near-infrared/NIR technology), which can automatically measure two key indicators in the same testing process: first, the water activity of the sample in a constant temperature environment is accurately measured by the equilibrium vapor pressure method (aw, usually in the range of 0.00-1.00), and then its water content (%) is synchronously calculated by thermogravimetric or spectroscopic methods. The device is equipped with intelligent temperature control, 7-inch touch screen, data storage, printing, and USB/network interfaces, which comply with international and domestic standards such as ISO 21807, AOAC, GB, etc.

Water activity and moisture content detectorWidely used in industries with strict requirements for moisture control, such as baked goods, meat products, milk powder, nuts, pharmaceutical raw materials, traditional Chinese medicine, feed, cosmetics paste, etc. Through a single test, dual key data can be obtained, helping enterprises scientifically set drying endpoints, optimize anti-corrosion schemes, verify packaging barrier performance, and effectively prevent mold, clumping, hardening, or degradation of active ingredients. It is an efficient tool for achieving product quality standardization and precise shelf life management.

2、 Functional Features

High measurement accuracy: The measurement accuracy is highly consistent with large laboratory instruments and equipment, with built-in heating modules that provide accurate measurement of physical and chemical indicators of oil at standard temperatures of 40 ℃ and 100 ℃

2. Easy to operate: The touch screen and its operation prompts assist in completing the entire measurement process. With a Chinese interface, users only need to prepare an oil sample and follow the operation guide prompts to read out the results.

3. Compact and lightweight, powered by lithium batteries, with no high voltage hazards for operation and instruments. Equipped with a built-in battery (with a working time of no less than 4 hours), it is easy to carry and can quickly measure the quality of oil products on site

4. Trend analysis can be conducted to observe changes in the physical and chemical indicators of oil products;

5. Real time display of oil status.

6. Built in memory for convenient data storage

3、 Technical parameters

4、 Technical parameters of sensors