Range of surface and interfacial tension 10 to 100 mN/m; Reproducibility ov measured values ± 0.1 mN/m Accuracy of surface tension ± 0.1 mN/m Dynamic time range 0.1 ms to 100 s Display - graphic display bw 320 x 240 pixel Min. volume test liquid 1 ml Temperature range 10 .. 80°C
Experimental time: - Standard mode (M1) 20-30 min - Fast mode (M4) 4-6 min Software 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. 30000 Memory on board 2 MB Process controlling option on board (on request) Dimensions (L x W x H): 200 x 250 x 400 mm Weight: 3 kg Power requerment: - Measurement unit 12 VDC - Power supply 100 … 240 AC; 50 … 60 Hz - Max. power consumption 6 W Extra accessories capillaries of different diameter and design Technical Data:
主要特点
Features direct and precise measurement of dead and life time surface tensions as function of physical time and adsorption time available time interval of 6 orders of magnitude (0.0001 to 100 s) precise measurement of scientific dynamic surface tensions direct determination of the hydrostatic pressure via automatic capillary immersion correction of effects from gravitation and viscosity of the liquid estimation of liquid’s viscosity temperature monitoring and control of the sample can be run also without PC
仪器介绍
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.
Software BPA-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