Nippon Seiki Co., Ltd.

Tetsuya Sato

Akira Sakamaki

Koichi Sato

Yoshiyuki Shimazaki

Kiyoshi Enomoto

Shigeki Koide

Takayuki Yamaura

Tadao Nakagawa

Toshio Hayakawa

Provided is a liquid-surface detection device in which a holder, which turns concurrently with movement of a float arm that moves based on a change in a liquid surface, is securely and rotatably mounted on a frame. A liquid-surface detection device includes a holder that includes an upper piece and a lower piece, and a frame that includes a bearing, a first groove, and a second groove. When mounting the holder onto the frame, the first groove guides the lower piece to the second groove, and the second groove further guides the lower piece to the bearing part so that the bearing part of the frame is disposed between the upper piece and the lower piece of the holder.

Liquid-surface detection device

A liquid level detecting apparatus resistant to the deterioration and corrosion thereof is provided while holding down an increase in the manufacturing cost thereof. This apparatushas fixed electrodeson which a sliding contact pointis slidingly moved in accordance with a fluctuation of a float, and a first resistorconnected to the fixed electrodes, the fixed electrodesbeing made of at least silver (Ag), palladium (Pd) and a glass component, a weight ratio of the silver (Ag) to palladium (Pd) being not lower than 75 wt. % to not higher than 25 wt. %, a sliding portionof the fixed electrodeson which the sliding contact pointis slidingly moved being covered with second resistorsa resistance value of which is lower than that of the first resistor

Liquid level sensor

Growing community of inventors

Niigata, Japan

Tetsuya Sato