diff --git a/blebox_uniapi/sensor.py b/blebox_uniapi/sensor.py
index 9d2a02e..bfa2d2c 100644
--- a/blebox_uniapi/sensor.py
+++ b/blebox_uniapi/sensor.py
@@ -19,7 +19,7 @@ def decorator(subclass: type):
 
     @classmethod
     def many_from_config(cls, product, box_type_config, extended_state):
-        type_class_mapper = BaseSensor.type_class_mapper
+        type_class_mapper = cls.type_class_mapper
         if extended_state:
             object_list = []
             alias, methods = box_type_config[0]
@@ -70,8 +70,6 @@ class BaseSensor(Feature):
     _device_class: str
     _native_value: Union[float, int, str]
 
-    type_class_mapper = {}
-
     def __init__(self, product: "Box", alias: str, methods: dict):
         super().__init__(product, alias, methods)