What does “piezoresistive” mean?
By changing the pressure, a thin membrane deforms on which a resistor bridge is mounted on the rear. These piezoresisitive resistors change with strain and pressure. The resulting deformation is used to measure the absolute pressure. |
Which advantages does the “ramp-impulse method” offer against the standard Pirani sensor?
The patented “ramp-impulse method“ measures conductivity by timing the duration of heating of the Pirani filament. It works at lower filament temperatures, therefore uses less power and offers a wider measurement range. |
Is the Pirani sensor protected against pollution and dirt?
All Thyracont Pirani sensors are fitted with a cover which protects against basic condensation and pollution. If the sensors are used in an extremely polluted environment, it is advised to additionally either use an extension pipe, an elbow fitting, a cooling trap or a seal ring with a sinter filter. |
Is it possible to clean the Pirani sensor?
Depending on the type and intensity of the pollution, it is feasible to clean the sensor with isopropanol.In order to do so, you need to fill the measuring cell completely with isopropanol and let it rest for a few minutes. After removal of the fluid it is necessary for the cell to completely dry out. Please note that if e.g. oil debris is baked onto the filament and is very tough or even impossible to clean. |
Do I have to mount the instrument into a specific position?
The instruments can be mounted in every position. The best accuracy is achieved if the flange of the instrument is mounted horizontally because the instruments are calibrated in this position. It is not recommended to mount the sensor at the bottom of a pipe as condensate and dirt could be collected in the sensor cell. |
How often do I need to recalibrate the compact vacuum meter?
The period between calibrations depends on the specific application. Especially in cases of coatings and contaminations on the sensor-head or if it is used in extreme temperature conditions, readjust of the instrument can be neccessary. For quality assurance matters, we recommend to return the instrument for calibration every one or two years. We can offer a works calibration (article no. ADJCERT) or a DAkkS calibration (article no. DKDCERT). |
| Analogline Passive Sensors |
Which output-signal is supplied by the sensor?
The VSP841/2 itself does not supply an output-signal. It is a passive pirani-sensor without evaluation electronics. On request, we are happy to provide an evaluation switching suitable for your application. |
Is the Pirani sensor protected against pollution and dirt?
All Thyracont Pirani sensors are fitted with a cover which protects against basic condensation and pollution. If the sensors are used in an extremely polluted environment, it is advised to additionally either use an extension pipe, an elbow fitting, a cooling trap or a seal ring with a sinter filter. |
Is it possible to clean the Pirani sensor?
Depending on the type and intensity of the pollution, it is feasible to clean the sensor with isopropanol. In order to do so, you need to fill the measuring cell completely with isopropanol and let it rest for a few minutes. After removal of the fluid it is necessary for the cell to completely dry out. Please note that e.g. oil debris is baked onto the filament and is very tough or even impossible to clean. |
Do I have to mount the instrument into a specific position?
The instruments can be mounted in every position. The best accuracy is achieved if the flange of the instrument is mounted horizontally because the instruments are calibrated in this position. It is not recommended to mount the sensor at the bottom of a pipe as condensate and dirt could be collected in the sensor cell. |
How often do I need to recalibrate the compact vacuum meter?
The period between calibrations depends on the specific application. Especially in cases of coatings and contaminations on the sensor-head or if it is used in extreme temperature conditions, readjust of the instrument can be neccessary. For quality assurance matters, we recommend to return the instrument for calibration every one or two years. We can offer a works calibration (article no. ADJCERT) or a DAkkS calibration (article no. DKDCERT). |
| Analogline Controller |
What is the difference between the VD6 and the VD12 gauge sets?
The VD6 is a compact 1 canal display and control unit suited for instrument panels (48×96 mm) for the transducers VSC43MA4 and VSP63MA4 only. The instrument has a USB-port for communication with a PC. Power supply and switching output are connected via phoenix strip terminal. |
| Vakuum Switches |
What does “piezoresistive” mean?
By changing the pressure, a thin membrane deforms on which a resistor bridge is mounted on the rear. These piezoresisitive resistors change with strain and pressure. The resulting deformation is used to measure the absolute pressure. |
How to set the switching point?
After the disassembly of the case which prevents accidental adjustment, the setting of the switching point is done with a potentiometer. The value of the switching point is displayed as a 0-1V analog signal for control purposes. |
Can you display the measurement values?
Yes, the measurement values are displayed as a 0-10 V analog signal. |
