Which of the following is an example of a TC pipette?

• A. Sahli
• B. Lang Levy
• C. Thoma Pipets/ Micropipets
• D. Kirk and Overflow

Answer: (C)

Understanding TC pipettes means recognizing devices designed to contain a precise volume until you deliberately transfer it to a new vessel, rather than relying on blowing out remaining liquid to achieve the volume. Thoma pipettes and modern micropipettes fit this idea well: they are built to hold an exact amount in the tip or reservoir and then dispense that exact amount in a controlled transfer. This containment-and-delivery approach is what characterizes them as TC-type tools.

Other options refer to specialized or older transfer devices used for particular assays (like hemoglobin methods) rather than the typical TC pipette category, so they aren’t the standard examples of TC pipettes.