diff --git a/unilabos/devices/liquid_handling/prcxi/prcxi.py b/unilabos/devices/liquid_handling/prcxi/prcxi.py
index ffe898b2..6d4922ee 100644
--- a/unilabos/devices/liquid_handling/prcxi/prcxi.py
+++ b/unilabos/devices/liquid_handling/prcxi/prcxi.py
@@ -546,100 +546,6 @@ class PRCXI9300TubeRack(TubeRack):
         return data
 
 
-class PRCXI9300PlateAdapterSite(ItemizedCarrier):
-    def __init__(self, name: str, size_x: float, size_y: float, size_z: float,
-                 material_info: Optional[Dict[str, Any]] = None, **kwargs):
-        # 处理 sites 参数的不同格式
-
-        sites = create_homogeneous_resources(
-        klass=ResourceHolder,
-        locations=[Coordinate(0, 0, 0)],
-        resource_size_x=size_x,
-        resource_size_y=size_y,
-        resource_size_z=size_z,
-        name_prefix=name,
-        )[0]
-
-        # 确保不传递重复的参数
-        kwargs.pop('layout', None)
-        sites_in = kwargs.pop('sites', None)
-
-        # 创建默认的sites字典
-        sites_dict = {name: sites}
-        # 优先从 sites_in 读取 'content_type'，否则使用默认值
-
-        content_type = [
-              "plate",
-              "tip_rack",
-              "plates",
-              "tip_racks",
-              "tube_rack",
-              "plateadapter"
-            ]
-        # 如果提供了sites参数，则用sites_in中的值替换sites_dict中对应的元素
-        if sites_in is not None and isinstance(sites_in, dict):
-            for site_key, site_value in sites_in.items():
-                if site_key in sites_dict:
-                    sites_dict[site_key] = site_value
-
-        super().__init__(name, size_x, size_y, size_z,
-        sites=sites_dict,
-        num_items_x=kwargs.pop('num_items_x', 1),
-        num_items_y=kwargs.pop('num_items_y', 1),
-        num_items_z=kwargs.pop('num_items_z', 1),
-        content_type=content_type,
-        **kwargs)
-        self._unilabos_state = {}
-        if material_info:
-            self._unilabos_state["Material"] = material_info
-
-
-    def assign_child_resource(self, resource, location=Coordinate(0, 0, 0), reassign=True, spot=None):
-        """重写 assign_child_resource 方法，对于适配器位置，不使用索引分配"""
-        # 直接调用 Resource 的 assign_child_resource，避免 ItemizedCarrier 的索引逻辑
-        from pylabrobot.resources.resource import Resource
-        Resource.assign_child_resource(self, resource, location=location, reassign=reassign)
-
-    def unassign_child_resource(self, resource):
-        """重写 unassign_child_resource 方法，对于适配器位置，不使用 sites 列表"""
-        # 直接调用 Resource 的 unassign_child_resource，避免 ItemizedCarrier 的 sites 逻辑
-        from pylabrobot.resources.resource import Resource
-        Resource.unassign_child_resource(self, resource)
-
-    def serialize_state(self) -> Dict[str, Dict[str, Any]]:
-        try:
-            data = super().serialize_state()
-        except AttributeError:
-            data = {}
-
-        # 包含 sites 配置信息，但避免序列化 ResourceHolder 对象
-        if hasattr(self, 'sites') and self.sites:
-            # 只保存 sites 的基本信息，不保存 ResourceHolder 对象本身
-            sites_info = []
-            for site in self.sites:
-                if hasattr(site, '__class__') and 'pylabrobot' in str(site.__class__.__module__):
-                    # 对于 pylabrobot 对象，只保存基本信息
-                    sites_info.append({
-                        "__pylabrobot_object__": True,
-                        "class": site.__class__.__name__,
-                        "module": site.__class__.__module__,
-                        "name": getattr(site, 'name', str(site))
-                    })
-                else:
-                    sites_info.append(site)
-            data['sites'] = sites_info
-
-        return data
-
-    def load_state(self, state: Dict[str, Any]) -> None:
-        """加载状态，包括 sites 配置信息"""
-        super().load_state(state)
-
-        # 从状态中恢复 sites 配置信息
-        if 'sites' in state:
-            self.sites = [state['sites']]
-
-
 class PRCXI9300ModuleSite(ItemizedCarrier):
     """
     PRCXI 功能模块的基础站点类（加热/冷却/震荡/磁吸等）。