Shimadzu-SALD-Acyclic Motion Sampler (Model:3101)

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Continuous measurement is possible at 30-second intervals. In other words, measurement efficiency has been increased by up to ten times. This shows a considerable effect in the evaluation of the state of samples with a rapidly changing particle size distribution, such as powder undergoing a grinding process.

Measurements that used to take 10 hours can now be completed in one hour.
This is considerably effective in reducing labor. For details, see Measurement Procedure page

Introduction of the sample is automatically detected to start measurement and data storage.

With an auto-sampler, multiple samples are set in place beforehand in small cups or other containers, and these are loaded automatically in order to the dispersing bath where they are measured. When an auto-sampler is used, the only operation performed by the operator is setting of the samples. Though this does save labor to some extent, it does not mean that the measurement time itself is shortened. Normally, the number of samples that can be set in place is about 30 at a single time, so samples must be set in place four times if, for example, 120 samples are to be measured. When setting samples in place, care must be taken not to set them in the incorrect order, which is a rather troublesome task. So, if anything, this increases the measurement time. Time is also required to check all of the data after measurement ends. Furthermore, if any problem occurs midway during measurement, the subsequent data might be invalidated. Taking all things into consideration, measurement of 120 samples cannot be completed within ten hours. Whereas, on the SALD-3101 high-speed wet-type particle size distribution measurement system, measurement can be performed entirely automatically simply by loading the samples. Moreover, since measurement results are displayed within 20 seconds after loading the sample, data can be checked in situ during the time (ten seconds) up to the next sample loading. So, the operator is never inconvenienced after all measurements have ended. This system shows its effectiveness in saving labor compared with auto-samplers since it can reliably complete measurement of 120 samples in one hour.

While the SALD-3100 High-Speed Wet-Type Particle Size Distribution Measurement System is in use, clean liquid medium is always introduced, and continuously discharged from the dispersing bath via the measuring unit. In other words, the dispersing bath, cell and inside of the piping is kept in a constantly clean state.
When a sample is introduced into the dispersing bath in this state, it is momentarily dispersed by a powerful homogenizer, diluted by a stirrer and the suspension is delivered to the measuring unit by a pump.
If the liquid medium (suspension) exceeds a fixed concentration at the measuring unit, the sampler recognizes that a sample has been introduced, and starts diffracted/scattered light detection. After this, if the liquid medium (suspension) falls below a fixed concentration, the sampler recognizes that a sample has been discharged, and ends diffracted/scattered light detection.
In this way, all diffracted/scattered light from sample introduction through to discharge is automatically detected to measure the particle size distribution and save measurement results.
After the sample is discharged, the sampler returns to standby where only clean liquid medium flows continuously.
The above describes a single measurement cycle.
One cycle lasts about 30 seconds. Consequently, the next measurement can be started 30 seconds after the initial measurement is begun.
With regular (circulation) measurement, one measurement cycle including washing takes between three to five minutes. Whereas, measurement by the Acyclic Motion Sampler is between six to ten times faster.

System Configuration

PC System Requirements