Electrolyte analyzer

An electrolyte analyzer comprising:

• a first electrode group that includes at least one electrode;
• a second electrode group that includes at least one electrode different from the first electrode group;
• and
• an electrode housing that houses electrodes of the first electrode group and the second electrode group, and includes:
• a pressing unit configured to press the electrodes against one another, wherein the pressing unit includes at least a spring, a shaft, a first end, a second end, and a holding portion secured to the electrode housing and having a hole which the shaft slides through,
• a first switch configured to switch the first electrode group between a first secured state and a first released state, wherein the first switch includes a first portion secured to the holding portion and a second portion rotatably supported around the shaft and having a first lever,
• a second switch configured to switch the second electrode group between a second secured state and a second released state, wherein the second switch includes a third portion secured to a moveable portion and a fourth portion rotatably supported around the shaft and having a second lever, and
• a spiral surface that connects the first portion, the second portion, the third portion, and the fourth portion, and wherein the first portion, the second portion, the third portion, and the fourth portion are configured to rotate along the spiral surface.