Ink liquid level height measuring apparatus and image forming apparatus

An ink liquid level height measuring apparatus, comprising:

• a detector that detects, as a continuous value, a change in a physical quantity associated with a change in a liquid level height of ink in a container;
• a magnetic body, the detector and the magnetic body being fixed to the container;
• a float disposed in the container that moves in association with the change in the liquid level height and includes a magnet;
• and
• at least one hardware processor, wherein
• the detector is a sensor that detects, as the continuous value, a change in magnetic flux density due to the magnet,
• the magnetic body and the sensor are disposed such that the sensor is located between the magnetic body and the magnet, and
• the at least one hardware processor obtains the liquid level height based on the physical quantity that has been detected.