中文技术说明供参考，译文尚待专业审核。原始英文说明及型号参数予以保留；选型前请与团队确认。
气动附件与传感器
执行器限位开关盒
APL210N、APL310N 和 APL410N 开关盒通过机械或接近开关提供气动执行器的开关位置反馈。
产品系列信息
目录内容描述产品系列。所选型号的尺寸、材料、压力限制及兼容性，须根据具体工况确认。
原始资料未提供此系列的独立规格表。请发送需求，以便确认合适的型号。
完整英文原始说明
The APL210N, APL310N, and APL410N Switch Boxes are compact, reliable position feedback devices designed for use with pneumatic actuators. These switch boxes provide accurate open/close position indication of the actuator by means of mechanical or proximity switches enclosed in a durable housing.
They are widely used in automated valve systems for monitoring and control in industries such as water treatment, chemical processing, and general automation. Each model offers rugged construction, easy mounting on standard actuator interfaces, and clear visual position indicators for quick on-site verification.
The APL series is designed to ensure long-term reliability, precise feedback, and compatibility with a wide range of actuators and control systems.