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 for precise liquid handling. Applicable for: Scientific research institutes, inspection departments, accurate measurement of liquids, suitable for 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 leakage or ejection of corrosive samples during use. Always 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. 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 Compatibility: 500 mL / 1000 mL bottles with screw caps (approximately 35 mm diameter) – bottle not included Application: Petrochemical, dye, environmental protection, and other industrial sectors Precautions: Not suitable for hydrofluoric acid and strong bases. Note: Product design may be updated periodically. Actual product may vary slightly in appearance or color. Please consider this before ordering if specific color or appearance is required. Color: As shown Material: Plastic Package Contents: 1 × Adjustable dosing device (Other items not included) Note: Lighting and display settings may cause slight color differences between the image and the actual item. Measurement error allowance: ±1–3 cm.