仪器简介:New development based on more than 10 years of experience in bubble pressure measuring technique. Many new instrumental details have been published recently, such as the determination of bubble time characteristics from the gas flow signal. To reach the extra short times of milliseconds and less, the special measurement routine of Fainerman is applied.Can work as stand-alone, graphic display on board.Unique instrument for measurements down to 0.1 milliseconds.The BPA-1S represents the high end instrument of bubble pressure tensiometry, and the BPA-1P is its simplified version.SoftwareBPA-1S can operate as stand-alone instrument. It stores data on board for 180 measurements which can be downloaded to a PC (both RS232 and USB port on board). The software allows graphical display of several measurements for comparison. Graphics with various zoom functions supports the visual analysis of the data. Export as text file or directly into MS Excel.Unique instrument for very short adsorption times down to 0.1 milliseconds due to the application of the Fainerman measuring routine. Automatic and manual determination of the critical flow rate. Required small bubble volume and deadtime possible due to specially designed capillaries.Fields of Application surfactant science pharmacy ink jet printing cosmetics coating technology food technology foam and emulsion technology medicine and biology detergency ecology技术参数:Range of surface and interfacial tension 10 to 100 mN/m Reproducibility ov measured values ± 0.1 mN/mAccuracy of surface tension ± 0.1 mN/mDynamic time range 0.1 ms to 100 sDisplay- graphic display bw 320 x 240 pixelMin. volume test liquid 1 mlTemperature range 10 .. 80°C Experimental time: - Standard mode (M1) 20-30 min- Fast mode (M4) 4-6 minSoftware Windows software (free update over 1 years after purchase)Number of measurement point: - All scan modes (M1, M3, M4) max. 180- Constant mode (M2) min. 30000Memory on board 2 MBProcess controlling option on board (on request)Dimensions (L x W x H): 200 x 250 x 400 mm Weight: 3 kgPower requerment: - Measurement unit 12 VDC - Power supply 100 … 240 AC 50 … 60 Hz - Max. power consumption 6 WExtra accessories capillaries of different diameter and designTechnical Data:主要特点:Featuresdirect and precise measurement of dead and life timesurface tensions as function of physical time and adsorption timeavailable time interval of 6 orders of magnitude (0.0001 to 100 s)precise measurement of scientific dynamic surface tensionsdirect determination of the hydrostatic pressure via automatic capillary immersioncorrection of effects from gravitation and viscosity of the liquidestimation of liquid’s viscositytemperature monitoring and control of the samplecan be run also without PC
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