The Background and Significance of Handheld Sieve in Tsinghua 81204

With the continuous popularization and development of science education, more and more primary schools begin to attach importance to the teaching of experimental courses. However, the traditional experimental equipment is often expensive and complex to operate, which is difficult to meet the needs of primary school teaching. To this end, Tsinghua University has developed a hand-held sieve specifically for primary school science education-Tsinghua 81204 hand-held sieve. This hand-held screen is not only reasonable in price, but also easy to operate, which is very suitable for primary school students.

Product Overview: What is Tsinghua 81204 Handheld Screen

Tsinghua 81204 Handheld Sieve is an efficient sample sieving designed for primary school science education and experiments. It adopts advanced design concept and technology, which can quickly and accurately separate various samples. This handheld screen is not only suitable for school laboratories, but also for quality control departments of scientific research institutions and production enterprises.

Three specifications: meet different experimental needs

Tsinghua 81204 hand-held screen provides three different specifications, which are suitable for the separation of samples with different particle sizes. Specifically, these three specifications are:
-**1mm specification**: suitable for larger particles of samples, such as sand, soil, etc.
- **0.5mm specification**: suitable for medium particle samples, such as powder, fine sand, etc.
- **0.25mm specification**: Suitable for fine particle samples, such as flour, fine soil, etc.
Regardless of the specification, it can ensure the highest standard of sample separation accuracy.

Materials and workmanship: Durable and safe design

Tsinghua 81204 handheld screen is made of high-quality stainless steel, with a smooth surface without burrs, not easy to rust, and durable. At the same time, the screen part is precisely processed, and the aperture is uniform to ensure the consistency and reliability of the separation effect. In addition, the design of the hand-held part conforms to the ergonomic principle, the grip is comfortable, and the long-term use will not feel fatigue.

Operation steps: easy to use

Using the Tsinghua 81204 handheld screen is very simple, and only a few simple steps can complete the separation of the sample:
1. **Prepare the sample**: Pour the sample to be separated onto the screen.
2. **Hand-held sieve**: Hold the hand-held part and gently shake the sieve to pass the sample through the sieve.
3. **Collect samples**: The separated sample will fall into the container below, and the part that does not pass the screen will remain on the screen.
The whole process is simple and quick, and even primary school students can easily master it.

Application scenario: Wide applicability from primary school to scientific research

Tsinghua 81204 handheld screen is not only suitable for elementary school science education, but also can be widely used in scientific research and production fields. For example, in geological research, it can be used for the classification of soil samples; in the food industry, it can be used for the screening of flour and other powders; in chemical experiments, it can be used for the classification of solid substances. Whether in the laboratory or in actual production, this handheld screen can play an important role.

Teaching Case: How to Use Tsinghua 81204 Handheld Screen in Classroom

The following are a few typical teaching cases showing how to use Tsinghua 81204 hand-held sieves in elementary school science classes:
-**Case 1: Soil Analysis**
Students can collect soil samples from different locations, use hand-held sieves for separation, observe soil components of different particle sizes, and understand the physical properties of the soil.
-**Case 2: Plant Seed Screening**
In biology class, students can use hand-held sieves to screen different kinds of plant seeds, compare their sizes and shapes, and learn the growth habits of plants.
-**Case 3: Mineral Identification**