The ear syringe, also known as an ear bulb, dust blower, or air blower, is a rubber tool commonly used for quantitative liquid extraction in laboratories.

Scope of Use for Ear Syringe:

Generally employed to blow away dust from surfaces prone to moisture, such as cleaning keyboards and circuit boards. In laboratory settings, the ear syringe is primarily used for pipettes and quantitative liquid extraction. It can also be utilized to disperse powdered substances in sealed containers.

The ear syringe is not limited to analytical laboratories; it is also used in various contexts. Watchmakers and repairmen in precision instrument repair shops often use the ear syringe to spray alcohol on metal surfaces for cleaning components. Photography enthusiasts frequently use the ear syringe to blow away dust from the surface of camera lenses. Additionally, the ear syringe is employed for tasks such as water suction drainage.

Instructions for Using the Ear Syringe:

1. Press the bulb twice to expel air and remove any potential contaminants inside the ear syringe.

2. Hold the ear syringe with the left hand and the pipette with the right hand. This configuration allows better control of the amount of liquid released by slightly moving the right hand.

3. Place the index finger at the upper end of the ear syringe, with the middle finger and thumb on either side. During the air expulsion, compress the air by squeezing the three fingers together.

4. With the left hand holding the ear syringe, expel the air from the bulb. Then, connect the pointed nozzle of the ear syringe to the opening of the pipette and slowly release the compressed ear syringe to draw the solution into the pipette, typically up to 10-20mm. Avoid drawing too shallow, as it may result in air suction, or too deep, which may cause excess solution outside the pipette.

5. Initially, draw in about one-third of the pipette's capacity. Press the pipette's opening with the index finger of the right hand, remove it, and repeat the rinsing process three times. Afterward, you can draw the solution above the calibration mark and immediately press the pipette's opening with the index finger of the right hand.

Currently, there is a type of quantitative suction bulb (three-ear suction bulb) used in conjunction with pipettes, serving as a useful assistant in laboratories. Despite the widespread use of pipettes, they cannot entirely replace the classic role of pipettes in quantitatively transferring liquids, especially when the liquid volume exceeds 1ml.

This ear syringe is suitable for use in industrial and mining enterprise laboratories, agricultural research laboratories, food testing laboratories, experimental chemical research laboratories, and educational chemical laboratories, among other institutional departments.