I. Main Features of the HD-7 Water Activity Meter:

1. The instrument is calibrated by the National Institute of Metrology of China and can serve as a reference device for transfer standards.

2. The application of a new imported sensor ensures stable and accurate measurements.

3. A new data processing model guarantees accurate measurements across the full range and ensures extremely high stability of measurement data.

4. Measurement time can be set to automatic, timed, manual, or scheduled modes, offering extremely flexible and convenient operation.

5. Historical data can be queried at any time based on sample name or measurement time.

6. The interface supports switching between Chinese and English, and the device can operate on both AC and DC power.

7. Remote control (up to 200 meters unobstructed) can be achieved using an Android smartphone.

8. No restrictions on the type of sample: solids, liquids, bulk materials, and powders can all be measured.

9. The fastest measurement time is only 2 to 3 minutes.

II. Main Technical Specifications:

1. Operating Environment: Temperature -10℃ to 50℃  Humidity 0 to 95%RH                                         

2. Display: 8-inch high-definition color smart screen with a resolution of 1920*1200.

3. Measurement Range: Temperature -10℃ to 50℃   Water Activity 0 to 1.0000aw                                 

4. Measurement Accuracy: Temperature ±0.30℃   Water Activity ±0.0080 (@23℃±5℃)                 

5. Activity Repeatability: ≤0.0040

6. Resolution: Activity: 0.0001aw  Temperature: 0.01℃                                         

7. Endpoint Control Method: Automatic, Timed, Manual (can be determined based on the measurement curve).

8. Measurement Time: ① Automatically determined end time ② Timed: 5 to 60 minutes.

9. Scheduled Measurement: Up to 3 time slots can be set for automatic sample measurement.

10. Data Processing:

① Direct operation of the instrument via the Android touchscreen.

② Displays measurement data and curves (can show changes as small as 0.0001aw).

③ Manual entry or selection of historical sample names and data storage.

④ Data query based on sample name or measurement time, with storage in Excel format.

⑤ Direct data editing and processing using office software.

⑥ Measurement results can be transmitted via WIFI.

11. Unlimited storage capacity for measurement data.

12. Calibration Methods: Multi-point joint calibration, single-point calibration.

13. Number of Measurement Points: 1 point.

14. Interface: USB port.

15. Power Supply Voltage: 100～230VAC 50Hz/60Hz or 3V～6V DC power.

16. Dimensions: 360mm×180mm×140mm.