| 摘要 |
PROBLEM TO BE SOLVED: To provide a liquid level sensor and an environment testing device capable of detecting a liquid level at positions in multiple levels different in a height direction while suppressing production costs.SOLUTION: An optical type liquid level sensor includes a plurality of light emission members 27 and light reception members 28. The plurality of light emission members 27 and light reception members 28 are disposed on a control board 32 on which a microcomputer 34 is loaded such that an optical sensor forming body 18 is formed. The optical sensor forming body 18 is incorporated in a container section 17 with which a prism 16 is integrally formed. Then, the light emission members and light reception members are set in a positional relation that when irradiation light from the light emission members 27 is reflected by the prism 16, the reflected light can be received by the light reception members 28 at positions different in a height direction. |
