Measuring water activity with a water activity meter gives an indication of how much water in a given sample resembles and behaves like pure water. Water activity values represent a scale that ranges from 0 (totally dry) to 1.0 (pure water). As water activity decreases, the water in a product decreases in energy and is less available. Water activity is the best index for microbial growth because it measures the amount of water that is actually freely available for biological growth processes. Water activity meters are helpful for improving food safety and quality.
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| Company | AquaLab | AquaLab |
| Item | 4TEV Water Activity Meter | Dew Point Water Activity Meter 4TE |
| Reviews | | |
| Catalog Number | Inquire | Inquire |
| Price | Inquire | Inquire |
| Description | All the features of the Series 4TE plus a volatiles sensor for measuring samples containing propylene glycol, ethanol and other volatiles.
Easy Switching
The 4TEV comes with both a volatiles capacitance sensor and the standard Series 4 dewpoint sensor. You can switch between sensors using the 4TEV All the features of the Series 4TE plus a volatiles sensor for measuring samples containing propylene glycol, ethanol and other volatiles.
Easy Switching
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.
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).
Features
- 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
... Read More | Speed and Accuracy
Measure water activity in 5 minutes or less (average read time: 2.5 minutes) with ±0.003 aw accuracy. AquaLab instruments are the fastest, most precise water activity meters available.
Use (Almost) Anywhere
Water activity meters must report a temperature because water activity Speed and Accuracy
Measure water activity in 5 minutes or less (average read time: 2.5 minutes) with ±0.003 aw accuracy. AquaLab instruments are the fastest, most precise water activity meters available.
Use (Almost) Anywhere
Water activity meters must report a temperature because water activity is temperature dependent. 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 AquaLab Water Activity Meter 4TE to get lab-quality 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.
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.
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.
Features
- Fast: water activity readings in 5 minutes or less
- Accurate: ±0.003 aw
- Verifiable with independent salt standards
- Repeatable: different users, different locations, same result
- Portable: weighs just 7 pounds
- Easy to use: precise measurements with minimal training
- Secure: offers administrative control over calibration and sample data
- Proven: used by 80 of the top 100 food companies
... Read More |
| Applications | Baked and Snack Foods, Beef Jerky, Candy and Confectionery, Cereal and Grain Products, Coffee/Tea, Cosmetics, Dried Distillers Grain, Dried/ Dehydrated Products, Materials, Nuts/Dried Fruit, Pet Food, Pharmaceuticals, Plastics, Processed/Cured Meat, Sauces/Dressings, Seed Longevity, Spices, Tobacco, Vegetable Oil | Baked and Snack Foods, Beef Jerky, Candy and Confectionery, Cereal and Grain Products, Coffee/Tea, Cosmetics, Dried Distillers Grain, Dried/ Dehydrated Products, Materials, Nuts/Dried Fruit, Pet Food, Pharmaceuticals, Plastics, Processed/Cured Meat, Sauces/Dressings, Seed Longevity, Spices, Tobacco, Vegetable Oil |
| Measuring Range | 0.030 to 1.000 aw | 0.030 to 1.000 aw |
| Accuracy | +/- 0.003 aw | +/- 0.003 aw |
| Measuring Time | < 5 min | < 5 min (average 2.5 min) |
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