diff --git a/src/graphnet/models/detector/detector.py b/src/graphnet/models/detector/detector.py
index 9b9fc61b0..599865bb9 100644
--- a/src/graphnet/models/detector/detector.py
+++ b/src/graphnet/models/detector/detector.py
@@ -1,7 +1,7 @@
 """Base detector-specific `Model` class(es)."""
 
 from abc import abstractmethod
-from typing import Dict, Callable, List
+from typing import Dict, Callable, List, Optional
 
 from torch_geometric.data import Data
 import torch
@@ -14,10 +14,13 @@
 class Detector(Model):
     """Base class for all detector-specific read-ins in graphnet."""
 
-    def __init__(self) -> None:
+    def __init__(
+        self, replace_with_identity: Optional[List[bool]] = None
+    ) -> None:
         """Construct `Detector`."""
         # Base class constructor
         super().__init__(name=__name__, class_name=self.__class__.__name__)
+        self._replace_with_identity = replace_with_identity
 
     @abstractmethod
     def feature_map(self) -> Dict[str, Callable]:
@@ -64,9 +67,13 @@ def sensor_index_name(self) -> str:
     def _standardize(
         self, input_features: torch.tensor, input_feature_names: List[str]
     ) -> Data:
-        for idx, feature in enumerate(input_feature_names):
+        feature_map = self.feature_map()
+        if self._replace_with_identity is not None:
+            for feature in self._replace_with_identity:
+                feature_map[feature] = self._identity  # type: ignore
+        for idx, feature in enumerate(input_feature_names):  # type: ignore
             try:
-                input_features[:, idx] = self.feature_map()[feature](  # type: ignore
+                input_features[:, idx] = feature_map[feature](  # type: ignore
                     input_features[:, idx]
                 )
             except KeyError as e:
diff --git a/src/graphnet/models/task/task.py b/src/graphnet/models/task/task.py
index cd750f35d..882627440 100644
--- a/src/graphnet/models/task/task.py
+++ b/src/graphnet/models/task/task.py
@@ -107,11 +107,11 @@ def __init__(
 
         self._transform_prediction_training: Callable[
             [Tensor], Tensor
-        ] = lambda x: x
+        ] = self._identity
         self._transform_prediction_inference: Callable[
             [Tensor], Tensor
-        ] = lambda x: x
-        self._transform_target: Callable[[Tensor], Tensor] = lambda x: x
+        ] = self._identity
+        self._transform_target: Callable[[Tensor], Tensor] = self._identity
         self._validate_and_set_transforms(
             transform_prediction_and_target,
             transform_target,
@@ -217,6 +217,10 @@ def _validate_and_set_transforms(
             if transform_inference is not None:
                 self._transform_prediction_inference = transform_inference
 
+    def _identity(self, x: Tensor) -> Tensor:
+        """Identity function."""
+        return x
+
 
 class LearnedTask(Task):
     """Task class with a learned mapping.