Adjustable liquid dispensers are widely used in daily analytical work in laboratories. They feature a unique design, high-quality materials, reliable manufacturing, and are trusted by users. This product is an adjustable liquid dispenser suitable for scientific research institutes, inspection departments, and accurate measurement of liquids, including solutions, acids, reagents, and biochemical samples. The thread pressing device of the liquid outlet pipe should be tightly screwed into the body of the liquid filling device to prevent sample ejection due to corrosion under pressure. Wear protective glasses when handling hazardous samples to avoid eye exposure. Usage: 1. Set the quantitative knob to the desired scale, lift it up, and press it down slowly. 2. Use the liquid feeder at normal temperature. Freshly prepared acid or base solutions should be cooled to room temperature before use. 3. This liquid dispenser can be directly installed on most 500 mL screw-top bottles (35 mm diameter). A GL45 adapter can be used to connect 1000 mL square reagent bottles. 4. Before each use, ensure that air is purged from the suction pipe and liquid outlet pipe to achieve accurate measurement. Capacity: 5–25 mL Accuracy: ±0.7 mL Minimum graduation: 1 mL Compatibility: 500 mL / 1000 mL bottles (Screw top approximately 35 mm) (Bottle not included) Applications: Petrochemical, dye, environmental protection, and other industries. Precautions: Not suitable for hydrofluoric acid and strong bases. Tips: Product design may be updated periodically. The actual product may have slight differences in color or appearance. Consider this before placing an order if specific color or appearance is required. Color: As shown Material: Plastic Package Contents: 1 x Adjustable dosing device Note: Only the items listed above are included. Other products are not included. Note: Lighting and display differences may cause the color in the image to vary slightly from the actual item. Measurement error allowance is +/- 1–3 cm.