Force meter
A force meter is an instrument to measure the magnitude of a force. This is often just a spring contained within a cylinder that has a scale to mark the extension of the spring produced by the force. In the International System of Units, the unit of force is the newton (symbol N). A force meter that measures force in newtons may be referred to as a newtonmeter.
Kip (unit)
The name comes from combining the words "kilo" and "pound"; it is occasionally called a "kilopound". Its symbol is kip, or less frequently, klb. When it is necessary to clearly distinguish it as a unit of force rather than mass, it is sometimes called the "kip-force" (symbol kipf or klbf).
Note that the symbol kp usually stands for a different unit of force, the "kilopond" or kilogram-force used primarily in Europe prior to the introduction of SI units.