Mirror condensation method water activity meterProduct Introduction

Mirror condensation method water activity meter

The dew point temperature is determined by cooling the mirror in the sample chamber until condensation occurs and recording the temperature of the mirror at that point. The saturated vapor pressure (P) can be obtained by checking the dew point temperature table. The ratio of this saturated vapor pressure (P) to the saturated vapor pressure of pure water (P0) is the water activity (aw=P/P0)

1Technical Specifications

1) Detection method: Mirror condensation method

2) Detection range: (0.030-1.000) aw

3) Maximum allowable error: ± 0.003aw

4) Resolution: ± 0.0001aw

5) Repetitive error: ≤ 3%

6) Test time: ≤ 30 minutes

7) Temperature control range: (10-50) ℃

8) Temperature control accuracy: ± 0.2 ℃

9) Working environment: temperature (4-50) ℃, relative humidity 0-90% (non condensing)

10) Sample temperature: (10-50) ℃ accuracy ± 0.2 ℃, resolution 0.01 ℃

11) Input power supply: (100~240) ± 10% VAC, 50/60 Hz

12) Power: ≤ 100W

13) Sample cup capacity: 7mL

14) Data storage: storage period of more than ten years (depending on the size of the memory, each group includes water activity, temperature, time, date, operator, and sensor type)

IIPerformance Characteristics

(1)Mirror condensation method

Traceable to international/national basic methods, traceable to international basic units of measurement (SI units), recommended methods in the United States Pharmacopeia<1112>.

(II)data integrity

Fully comply with GMP and 21 CFR Part 11 requirements for electronic data integrity, with four levels of password access, audit trail functionality, and multiple forms of backup.

(3)Strong storage capacity

Record the temperature detection time and sample information, and store data for more than 10 years

(IV)High measurement accuracy

Accuracy ± 0.003aw, making the measurement of the instrument more precise

(V)Verification and Calibration

Low cost consumables, no need for tedious and time-consuming sensor calibration

(VI)Fast testing speed

Standard active temperature control module, fast and precise temperature control, reducing detection time to within 4 minutes

IIIConsumables List

4Collection of Regulatory Compliance:

（1） United States Pharmacopeia USP<922>Water Activity Measurement

（2） Application of USP<1112>Water Activity Determination in Non Sterile Drugs

（3） USP<1241>Water solid interactions in pharmaceutical systems

（4） Chinese Pharmacopoeia "Guiding Principles for the Application of Water Activity in Microbial Control of Non Sterile Drugs"

（5） CDE Technical Guidelines for Microbial Limit Research of Non sterile Chemical Drugs and Raw Materials (Draft for Comments)