The fully automatic SIEBTECHNIK TEMA gas pycnometer is a high-precision tool for determining the density (skeletal density, also called true density) of solids and bulk goods.
A GLOBAL FIRST
Why is it the next generation?
The sample to be analyzed is typically placed manually into the measuring chamber of the gas pycnometer. In our device, the sample is placed in the measuring cell using a sample handling device. The process, which was previously carried out completely manually, has thus been automated, and the volume and mass of the solid are now determined in a single device.
The sample material is fed into the device from the outside, ideally via a sample magazine in which the samples to be analyzed are buffered for the desired period of time.
KEY FEATURES
What are the advantages of the BULKINSPECTOR compared to conventional gas pycnometers?
- No manual intervention required during measurement, weighing and volume determination take place automatically inside the device.
- Highly accurate, fast and reproducible measurement of sample density.
- Use of various sample gases
- Non-destructive testing
- Variable measuring cup volumes
- Temperature control for the device using Peltier elements
- Userfriendly Interface & mobile control panel
- Data transfer to external systems
- Online analysis with automatic sampling from the process
Suitable for use in automated production processes
Robust, precise and resilient
The BULKINSPECTOR gas pycnometer is a closed system, the harsh environment of an industrial plant, i.e. sound, dust, heat, cold, dirt or moisture do not bother it.
The insulated steel housing is largely insensitive to external influences. The samples can be fed by conveying devices, such as a closed vibratory feeder. In this way, contamination of the sample can be excluded.
Since the weighing takes place inside the BULKINSPECTOR, external influences can be almost excluded here as well. Furthermore, the high-precision weighing cell is less sensitive to vibrations than common standard scales.
The temperature inside the device is kept constant by means of a Peltier element, therefore heat or cold also have no influence on the measuring result, even such values as the constantly changing air pressure do not falsify the measuring result.
Therefore the BULKINSPECTOR gas pycnometer is equally suitable for laboratory and rough process conditions.
What problems do standard pycnometers have in industrial plants?
USERFRIENDLY INTERFACE
and extended functionality
The pycnometer is controlled via a mobile control panel (tablet), which is included in the items supplied.
After opening the app, the user is presented with a userfriendly, modern interface design for operating the device.
Formulas for different samples can be set and managed via this interface. Measurement records can also be managed & exported, and the basic settings of the device can be adjusted. Depending on the user level, some of these function are password-protected.
The operator can also access the user instructions via the tablet. If necessary, they can order any spare and wearing parts required from us directly online.
OPERATIONAL PRINCIPLE
and technical details
After the material sample has been picked up in a measuring cup, this is inserted into the measuring cell via a handling device and the volume of the sample is determined there according to the advance settings selected.
After the repeat determination of the volume, the handling device transports the material on to the scale for determination of the sample mass.
The two parameters volume and mass are now known, and from these the density of the sample is automatically calculated.
Finally the handling device removes the measuring cup and discharges the measured material sample into the emptying device. There the measuring cup is additionally cleaned with compressed air and is then ready to receive the next sample.
Because the sample volume needs to be matched to the volume of the measuring cup for precise measurements, the fully automatic gas pycnometer offers the option of holding different measuring cups in parking positions inside the unit.
For automatic calibration, one of the measuring cup positions can be provided with a calibration volume so that recurring measurements for recalibration can be carried out during ongoing operation.
When selecting the components, special care was taken to ensure that the mechanical measurement setup, the transducers selected and the analysis electronics all generate reproducible measurement results with a low standard deviation.
In addition, the interior of the insulated housing is heated or cooled as required via Peltier elements in order to maintain a constant temperature for the measurement.
Get a closer look at how our pycnometer works
Watch the video below
PYCNOMETER TECHNICAL DATA
Important figures
| Model | PYC 130-A |
| Measuring cup volumes | 130 / 65 / 10 cm³ |
| Number of holding points for measuring cups | 4 |
| Sample gas | Helium |
| Measurement pressure | 0 ... 140 kPa |
| Scale | 0 ... 510 g +/- 0.0001g |
| Measurement temperature | 15 ... 35°C |
| Calibration method | Automatic calibration with calibration sphere |
| Measurement uncertainty | +/- 0.02% |
| Data Interface | Wifi |
| Dimensions (w/d/h) | 1100 x 675 x 855 mm |
| Weight | 190 kg |
| Power supply | AC 110 V/16 A/60 Hz, AC 230 V/10 A/50 Hz |
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