
is a system for monitoring and controlling the pH value when performing dissolution tests.
The system for simultaneous monitoring and controlling the pH value in 8 dissolution test vessels, when performing dissolution test, consists of a pH monitoring unit, a relay-output unit, and a software.
Brochures
Dissolution pH monitoring and controlling
is a system for monitoring and controlling the pH value when performing dissolution tests.
The system for simultaneous monitoring and controlling the pH value in 8 dissolution test vessels, when performing dissolution test, consists of a pH monitoring unit, a relay-output unit, and a software.
The pH monitoring unit consists of 8 high quality pH electrodes with extended cables. There is also possible to use the ion-selective electrodes in case if measurements of ionic concentration in an aqueous solution are required.
For mounting the electrodes on dissolution apparatus there exists two possibilities:
- electrodes are fixed on the covers of the vessels with special grippers and
- electrodes are movable (could be lifted up and down) using sampling manifold.
The relay-output unit serves for precise sparging of carbon dioxide or nitrogen in each vessel in order to control pH value and time-controlled by relays. Gas flow control valves are not the ON-OFF type but enable exact flow rate of the gas. Power relays are housed in a protection enclosure with removable lid.
The software for monitoring the process was developed by company EA Instruments Ltd, United Kingdom. Software runs on Microsoft Windows operating systems: Windows XP, Vista, Windows 7, 8, 10. The display of results is presented in tabular and graphic form. Measuring cycle and measuring time limit can be set in a wide range. Single and simultaneous pH calibration is possible. The control set up enables the individual settings for the pH set point and control parameters for each channel.
Specification
Product | pH monitoring and controlling |
---|---|
Dimensions & Weight | 300 mm x 200 mm x from 100 mm 225 mm (LxWxH); 2 kg |
Power supply | 12 V DC stabilized, , 1200 mA, DC Power socket, 21 mm |
Connection to the computer | Serial Data transmission RS 232, RS 232 to USB converter is also provided |
Sensor connections | BNC Sockets for pH-, ORP- and Ion selective electrodes |
Sensors: | pH; accepts all types including pH electrodes with built-in temperature sensor (Pt1000) or pH electrodes with seperate PT1000 temperature and pH microelctrodes |
Measuring Range, Resolution and Accuracy | |
pH Range: | 0.00 to 14.00 |
pH Resolution: | 0.01 pH unit |
pH Accurayz: | 0.01 pH unit |
The resolution is approximately 0.5% of the measured value, depending on the range | |
The Accuracy is highest near the calibration point, about 0.5%. It is therefore recommended to calibrate close to the expected sample value. |