In addition to the standard dew point sensor, the Series 4TEV has a hygroscopic polymer capacitance sensor that can be used to measure the water activity of samples containing volatiles. You can switch between sensors using the instrument menu. The capacitance sensor is less accurate (± 0.015 aw) than the dew point sensor (± 0.003 aw).
For samples containing volatiles: 4TEV and AQUALAB TDL
The Series 4TEV is best for customers who occasionally need to measure samples that contain volatile ingredients in low concentrations. If the product itself is volatile (soy sauce, alcohols, flavorings, black tea) or contains a high concentration of volatiles (flavored teas, sauces and seasonings), the laser sensor in the AQUALAB TDL is a better option.
- 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
|Volatiles sensor accuracy|
± 0.015 aw
|Dewpoint sensor accuracy|
|Water Activity Accuracy|
±0.005 @ 25 ◦C
|Water Activity Resolution|
|Water Activity Range|
0.000 − 1.000 aw
|Water Activity Repeatability|
≤ 5 min
25 ◦C Standard; 15 to 50 ◦C (with calibration)
|Temperature Adjustment Increment|
|Sample Temperature Accuracy*|
|Sample Temperature Resolution|
User-Selectable Range, Internal Thermoelectric Controlled
|Sample Dish Capacity|
7.5 ml Recommended (15 ml Full)
Average of 5 minutes
Alphanumeric, Programmable to Display Product Name, Lot, or Product ID Number
128 x 64 Pixel Graphical Display with Backlighting
26.7 x 17.8 x 12.7 cm
Machined Aluminum Frame; Lustran 433 (ABS) with Fire Retardant
3.1 Kg (6.83 lbs.); Instrument only: 6.55lb = 2.97 kg
110 to 220 VAC, 50/60 Hz Warranty: One year parts and labor
4 to 50 ◦C; 90% Relative Humidity (Non Condensing)Operating Environment: 4 to 50 ◦C; 90% Relative Humidity (Non Condensing)
One Year Parts and Labor
*AquaLab TDL is calibrated to a NIST traceable temperature standard.
Have a question or problem? Our support team can help.
We manufacture, test, calibrate, and repair every instrument in house. Our scientists and technicians use the instruments every day in our product testing lab. No matter what your question is, we have someone who can help you answer it.