tiputuskynä

Tiputuskynä, literally “drop pen,” is a hand-held instrument designed to dispense small, precise amounts of liquid one drop at a time. The device is typically pen-shaped and used in settings where controlled dosing or dosing-by-droplet is important. It consists of a reservoir for the liquid, a fine discharge tip, and a mechanism to release drops, such as a squeezable bulb, a plunger, or a small valve.

The basic operation involves drawing liquid into the tip and then releasing it in a controlled manner. Droplet size is influenced by the tip diameter, the liquid’s viscosity and surface tension, and the amount of pressure or suction applied. Some tiputuskynät are calibrated to deliver known volumes per drop, while others rely on the user’s estimation and steady handling. Materials commonly used include glass and various plastics; the tips are designed to minimize clogging and allow easy cleaning or sterilization when necessary.

Uses of tiputuskynä span several domains. In medicine, they are employed for external applications such as ophthalmic or dermatological solutions and for precise topical dosing. In laboratories, they are used to add reagents dropwise during reactions, staining procedures, or sample preparation. Educational settings use them for demonstrations of capillary action and liquid handling, and artists or crafters may employ them for applying solvents, dyes, or glazes with fine control.

Care and safety considerations include keeping the instrument clean to prevent contamination, using appropriate solvents for cleaning, and distinguishing tiputuskynä from needles or syringes, which are intended for injections.