| 摘要 |
A liquid toner concentration measuring device is provided with: a main passage (2); a liquid toner pump (133) for circulating liquid toner through the main passage (2); a main passage guide (3) for arranging a part of the main passage (2) horizontally or downwardly toward the downstream side; a bubble separation unit (4) which is provided on the uppermost portion of the main passage guide (3) horizontally or upwardly toward the downstream side; and a concentration sensor (151) which is provided on the main passage (2) on the downstream side of the main passage guide (3) and measures the toner concentration of the liquid toner. |
