diff --git a/src/backscattering_experimental_data/factory/__init__.py b/src/backscattering_experimental_data/factory/__init__.py
index 9de359e..9801e03 100644
--- a/src/backscattering_experimental_data/factory/__init__.py
+++ b/src/backscattering_experimental_data/factory/__init__.py
@@ -1,6 +1,10 @@
 from ..factory.component import ComponentFactory
 from ..factory.scatterer import ScattererFactory
 from ..factory.measurement import MeasurementFactory
+from ..factory.initializer import (
+    InitializerComponent,
+    InitializerScatterer,
+)
 
 __all__ = [
     "ComponentFactory",
diff --git a/src/backscattering_experimental_data/factory/initializer.py b/src/backscattering_experimental_data/factory/initializer.py
new file mode 100644
index 0000000..8a2b7dc
--- /dev/null
+++ b/src/backscattering_experimental_data/factory/initializer.py
@@ -0,0 +1,28 @@
+from astropy.units import Quantity
+from typing import NamedTuple
+from astropy.units.physical import length, electrical_potential
+from ..metadata.injection import (
+    Injection,
+)
+
+
+class InitializerComponent(NamedTuple):
+    """
+    Class to store metadata before knowing the data associated to the
+    component
+    """
+
+    name: str
+    calibration_factor: Quantity[length / electrical_potential]
+
+
+class InitializerScatterer(NamedTuple):
+    """
+    Class to store metadata before knowing the data associated to the
+    scatterer (the scatterer metadata contains component data).
+    """
+
+    name: str
+    calibration_factor: Quantity[length / electrical_potential]
+    associated_component: InitializerComponent | None
+    injection: Injection | None
diff --git a/src/backscattering_experimental_data/factory/measurement.py b/src/backscattering_experimental_data/factory/measurement.py
index aefb7b4..9045e34 100644
--- a/src/backscattering_experimental_data/factory/measurement.py
+++ b/src/backscattering_experimental_data/factory/measurement.py
@@ -1,18 +1,14 @@
-from typing import NamedTuple
 from astropy.units import (
     Quantity,
     W,  # pyright: ignore[reportAttributeAccessIssue]
     mW,  # pyright: ignore[reportAttributeAccessIssue]
     Unit,
 )
-from astropy.units.physical import time, length, electrical_potential
+from astropy.units.physical import time
 from gwpy.time import Time
 
 from ..component import Component
 from ..lockingstate import LockingState
-from ..metadata.injection import (
-    Injection,
-)
 from ..measurement import Measurement
 from ..scatterer import Scatterer
 from ..utils import download_dicttimeseries, download_timeseries
@@ -23,28 +19,9 @@ from ..metadata.scatterer import Scatterer as MetadataScatterer
 
 from ..factory.component import ComponentFactory
 from ..factory.scatterer import ScattererFactory
-
-
-class InitializerComponent(NamedTuple):
-    """
-    Class to store metadata before knowing the data associated to the
-    component
-    """
-
-    name: str
-    calibration_factor: Quantity[length / electrical_potential]
-
-
-class InitializerScatterer(NamedTuple):
-    """
-    Class to store metadata before knowing the data associated to the
-    scatterer (the scatterer metadata contains component data).
-    """
-
-    name: str
-    calibration_factor: Quantity[length / electrical_potential]
-    associated_component: InitializerComponent | None
-    injection: Injection | None
+from ..factory.initializer import (
+    InitializerScatterer,
+)
 
 
 class MeasurementFactory: