TDL Water Activity Meter

Introduction to the American Aqualab TDL Water Activity Meter:

The AquaLab TDL tunable laser sensor is unaffected by volatile substances and is a water activity meter for measuring all types of samples. Both laboratory technicians and production line operators can measure water activity values within 5 minutes, achieving an accuracy of ±0.005 aw.

In 1983, Decagon Devices, Inc. invented an instrument for measuring the water activity of food. Since then, Decagon has been a leader in water activity solutions, with its traceable chilled-mirror dew point method becoming the industry gold standard. Currently, over 80% of U.S. food companies use Decagon's Aqualab water activity meters.

Decagon provides comprehensive moisture solutions, including the Aqualab water activity meter, the TrueDry CV9 fully automated multi-sample moisture content analyzer, and the Aqualab VSA water sorption analyzer.

Features of the American Aqualab TDL Water Activity Meter:

AquaLab TDL High-Performance Tunable Laser Water Activity Meter

AquaLab TDL measures all samples and is a water activity meter unaffected by volatile substances.

Breakthrough tunable laser technology

Precise laser beam measures only moisture

Suitable for All Samples

The tunable laser sensor is suitable for all samples, overcoming the limitations of other sensor technologies.

Easy to operate, clean, and maintain

Fully enclosed sample chamber with no moving parts. Easy to clean and requires no other daily maintenance.

Testing Method of the American Aqualab TDL Water Activity Meter:

Testing Method

Take approximately 7 mL of the sample, place the sample cup into the sample chamber, close the instrument lid, and seal it to wait for vapor equilibrium. At equilibrium, the relative humidity of the air in the sample chamber equals the water activity of the sample. The tunable laser sensor TDL uses a specific wavelength of laser to measure the relative humidity of the air above the sample. Water vapor has strong absorption in the near-infrared region, allowing the sensor to measure the water vapor above the sample and convert it into a water activity value.

Unaffected by Volatile Substances

The laser beam, with a bandwidth of less than 1 nm, specifically responds to common isotopes of water. Other vapor molecules, even other isotopes of water, do not affect the results.

Suitable for All Samples

The AquaLab TDL tunable laser sensor overcomes the limitations of other testing technologies and can measure all samples, including high-concentration ethanol and even gasoline.

Simple Operation, Fast and Accurate

Water activity measurements for most samples can be completed within 5 minutes, with an accuracy of ±0.005 aw. The AquaLab TDL water activity meter is the fastest water activity meter on the market.

Usable Almost Anywhere

Water activity is temperature-dependent. The testing temperature can be set anywhere between 15-50 °C. Internal temperature control ensures the sample temperature remains constant, and the test is unaffected by ambient temperature.

Easy to Clean and Maintain

The Aqualab TDL water activity meter features a fully enclosed sample chamber with no moving parts. Simply open the sample chamber to directly clean the chamber and sensor.

Data Security

The Aqualab TDL water activity meter can store up to 8,000 sets of data on the device. This includes water activity readings, measurement time, date, and operator information. Data can be transferred to a computer via RS-232 serial data interface or USB interface for analysis and archiving, or printed directly. Management functions allow setting data access permissions, with support for up to 25 users and passwords.

Technical Parameters of the American Aqualab TDL Water Activity Meter:

Sensor Type: Tunable Laser Sensor, Infrared Temperature Sensor

Accuracy: ±0.005 (25 °C)

Measurement Range: 0.000 ~ 1.000 

Resolution: 0.0001 

Repeatability: ±0.001 

Sample Cup Capacity: Recommended 7 mL (15 mL)

Measurement Time: Less than 5 minutes

Display: 128×64 graphical interface

Temperature Control: 15 ~ 50 °C

Sample Temperature Accuracy: ±0.2 °C

Data Storage: 8,000 sets (each set includes water activity, moisture content, temperature, time, date, operator, and sensor type)

Program Identification: Alphanumeric, programmable to display product name, batch number, or product ID number

Operating Environment: Temperature: 4 to 50 °C, Relative Humidity: 0 to 90% (non-condensing)

Power Supply: 110V to 220V AC, 50/60 Hz, < 0.4 Amps

Data Interface: Compatible with RS232A, USB

Dimensions: 26.7 × 18.0 × 12.7 cm

Material: Lustran 433 (ABS), flame-retardant material

Weight: 3.1 kg

Our company also sells the following products. For details, please call for consultation:

Viscometers (rotational and capillary), Sieve Analyzers (electromagnetic vibrating sieves, air jet sieves, and Tyler sieves), Water Activity Meters, Colorimeters, Melting Point Apparatus, Density Meters, Autoclaves, Ultrasonic Cleaners, UV-Ozone Cleaners, Pipettes, Analytical Balances, Moisture Analyzers (infrared halogen, Karl Fischer), Centrifuges, Emulsification Homogenizers, Magnetic Heating Stirrers, Vacuum Stirrers, Vacuum Pumps, Shakers, Water/Oil Baths, Ovens, Constant Temperature and Humidity Chambers, Incubators, Water Purification Systems, Muffle Furnaces, Refractometers (Brix meters), Polarimeters, Osmometers, Colony Counters, Ultra-Low Temperature Freezers, Pharmaceutical Storage Cabinets, Biological Safety Cabinets, Jacketed Reactors, Bottle Washers, Vacuum Filtration Systems