All the features of the Series 4TE plus a volatiles sensor for measuring samples containing propylene glycol, ethanol and other volatiles.
The 4TEV comes with both a volatiles capacitance sensor and the standard Series 4 dewpoint sensor. You can switch between sensors using the 4TEV instrument menu.
Fast - water activity readings in 5 minutes or less
Switch easily between volatiles and non-volatiles sensors
Volatiles sensor accuracy: ± 0.015 aw
Non-volatiles sensor accuracy: ±0.003 aw
Verifiable with independent salt standards
Repeatable - different users, different locations, same result
Portable - the meter weighs just 7 pounds
Easy to use - precise measurements with minimal training
Secure - offers administrative control over calibration and sample data
How It Works
Put a 7.5 ml product sample in a disposable cup, seal the sample chamber lid over the sample, and wait for vapor equilibrium.
For non-volatile samples, an infrared beam focused on a tiny mirror determines the precise dewpoint temperature of the sample. That dewpoint temperature is then translated into water activity.
For samples containing volatiles, a hygroscopic polymer sensor detects the equilibrium relative humidity of air in the headspace above the sample. This method is slightly less accurate than the dewpoint method (±0.015).
Use (Almost) Anywhere
Internal temperature control lets you set a measuring temperature between 15º - 50°C and use the instrument anywhere-even outside the QC lab.
Use the 4TE to get lab-quality water activity measurements at the line, receiving dock, processing plant, storage facility-anywhere you need to test and verify the safety and quality of your products and ingredients.
Easy to Clean
The sample chamber lid flips up so contaminated sensors are quick to spot and easy to clean.
The 4TE stores time, date, and user information with every measurement and calibration, and can store up to 10,000 secure data points.
Administrative functions can be set to control access to data. Designate up to 25 unique users and passwords. Use the RS-232 serial data port to download or print data for statistical analysis and to maintain compliance records and archives.
ecagon Devices, Inc. - Makers of the AquaLab Line of Products
Decagon designs, manufactures, and markets scientific instruments. The AquaLab division focuses on measuring total moisture (water activity, moisture content, and moisture sorption isotherms) in foods, pharmaceuticals, and other products.
Decagon's instruments are used by more than 80% of the top 100 foods companies. They're also used by pet food manufacturers, pharmaceutical companies, universities, government agencies, research and testing labs, and in other industrial applications.
When Decagon was founded in 1983, water activity was still an emerging concept in the food industry. Now most companies measure water activity to assure the safety and quality of their products. The speed and accuracy of the AquaLab series of water activity meters has become an industry standard.
Interesting Decagon Facts:
Decagon has done many novel water activity projects for manufacturers, including measuring the water activity of cupric oxide in air bags and determining the moisture content of plastic pellets.
Decagon got a peek into military life when the Department of Defense Combat Feeding Program used water activity to make sandwiches with a three-year shelf-life for MREs.
Decagon also makes instruments for environmental research. (Visit our environmental science division at www.decagon.com).
Decagon built a thermal and electrical conductivity probe for NASA's Phoenix Scout Lander mission to Mars. The probe successfully gathered thermal and electrical properties data in addition to measuring atmospheric humidity and wind speed.
Decagon is located in Pullman, Washington, home of Washington State University.
Quality Management at Decagon
In order to provide timely feedback to the high volume of vendor surveys and evaluation requests Decagon Devices, Inc. receives, Decagon has created a Quality Survey Response for our customers. We have designed this response to fit the majority of the questions we are asked in regards to our Quality Management System, ISO9001:2008 registration and calibration services.