Adjustable liquid dispensers are widely used in daily analytical work in laboratories. Featuring a unique design, high-quality materials, and reliable construction, this product is trusted by users. It is suitable for scientific research institutes, inspection departments, and applications requiring accurate measurement of liquids, including solutions, acids, reagents, and biochemical samples. The thread pressing device of the liquid outlet pipe should be securely screwed into the body of the liquid filling device to prevent sample leakage when pressure is applied. Always wear protective glasses when handling samples that may be harmful to the eyes. Usage instructions: 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. Allow freshly prepared acid or base solutions to cool to room temperature before use. 3. This dispenser can be directly installed on most 500 mL screw-top bottles (35 mm diameter). A GL45 adapter allows connection to 1000 mL square reagent bottles. 4. Before each use, purge air from the suction pipe and liquid outlet pipe to ensure accurate measurement. Specifications: - Capacity: 5–25 mL - Accuracy: ±0.7 mL - Minimum graduation: 1 mL - Bottle compatibility: 500 mL and 1000 mL bottles with screw caps (approximately 35 mm diameter) - Note: Bottle not included Applications: Petrochemical, dye, and environmental protection industries. Precautions: Not suitable for hydrofluoric acid or strong bases. Note: Product design and appearance may vary slightly due to ongoing updates. Colors and details may differ from images due to lighting and display variations. The actual item may have minor differences in color or appearance compared to the picture. Measurement tolerance: ±1–3 cm. Package contents: 1 × Adjustable dosing device Note: Other items shown are not included.