diff --git a/brukerapi/dataset.py b/brukerapi/dataset.py
index 41ba197..32323ea 100644
--- a/brukerapi/dataset.py
+++ b/brukerapi/dataset.py
@@ -24,7 +24,7 @@
     UnsuportedDatasetType,
 )
 from .jcampdx import JCAMPDX
-from .schemas import Schema2dseq, SchemaFid, SchemaRawdata, SchemaSer, SchemaTraj
+from .schemas import Schema2dseq, SchemaFid, SchemaRawdata, SchemaTraj
 
 LOAD_STAGES = {
     "empty": 0,
@@ -60,12 +60,6 @@
         "load": LOAD_STAGES["all"],
         "mmap": False,
     },
-    "ser": {
-        "parameter_files": ["acqp", "method"],
-        "property_files": [Path(__file__).parents[0] / "config/properties_ser_core.json", Path(__file__).parents[0] / "config/properties_ser_custom.json"],
-        "load": LOAD_STAGES["all"],
-        "mmap": False,
-    },
     "rawdata": {
         "parameter_files": ["acqp", "method"],
         "property_files": [Path(__file__).parents[0] / "config/properties_rawdata_core.json", Path(__file__).parents[0] / "config/properties_rawdata_custom.json"],
@@ -144,7 +138,6 @@ class Dataset:
     - **schema**:
         - :py:class:`~brukerapi.schemas.SchemaFid`
         - :py:class:`~brukerapi.schemas.Schema2dseq`
-        - :py:class:`~brukerapi.schemas.SchemaSer`
         - :py:class:`~brukerapi.schemas.SchemaRawdata`
 
     An object encapsulating all functionality dependent on metadata. It provides method to reshape data.
@@ -197,6 +190,9 @@ def __init__(self, path, **state):
             self.subtype = self.subtype[1:]  # remove the dot from the suffix
         self._properties = []
 
+        if self.type not in DEFAULT_STATES:
+            raise UnsuportedDatasetType(self.type)
+
         # set
         self._set_state(state)
 
@@ -512,8 +508,6 @@ def load_schema(self):
             self._schema = Schema2dseq(self)
         elif self.type == "rawdata":
             self._schema = SchemaRawdata(self)
-        elif self.type == "ser":
-            self._schema = SchemaSer(self)
         elif self.type == "traj":
             self._schema = SchemaTraj(self)
 
@@ -531,7 +525,7 @@ def load_data(self):
         deserialized into a data array. The process of deserialization is different for each data set type and is
         implemented in the individual subclasses of the :class:`brukerapi.schemas.Schema`,
         i.e. :class:`brukerapi.schemas.SchemaFid`, :class:`brukerapi.schemas.Schema2dseq`,
-        :class:`brukerapi.schemas.SchemaRawdata`, :class:`brukerapi.schemas.SchemaSer`.
+        :class:`brukerapi.schemas.SchemaRawdata`.
 
         If the object was created with random_access=True, the data is not read,
         instead it can be accessed using sub-arrays.
diff --git a/brukerapi/schemas.py b/brukerapi/schemas.py
index 62a0124..4975a81 100644
--- a/brukerapi/schemas.py
+++ b/brukerapi/schemas.py
@@ -462,28 +462,6 @@ def serialize(self, data, layouts):
 SchemaRawdata.seralize = SchemaRawdata.serialize
 
 
-class SchemaSer(Schema):
-    @property
-    def layouts(self):
-        if self._layouts is not None:
-            return self._layouts
-
-        PVM_SpecMatrix = self._dataset.get_value("PVM_SpecMatrix")
-        PVM_Matrix = self._dataset.get_value("PVM_Matrix")
-        PVM_EncNReceivers = self._dataset.get_value("PVM_EncNReceivers")
-        layouts = {}
-        layouts["raw"] = (PVM_SpecMatrix, PVM_EncNReceivers, PVM_Matrix[0], PVM_Matrix[1])
-        return layouts
-
-    def deserialize(self, data):
-        data = data[0::2] + 1j * data[1::2]
-        data = np.reshape(data, self.layouts["raw"], order="F")
-        return data
-
-    def serialize(self, data):
-        raise NotImplementedError
-
-
 class Schema2dseq(Schema):
     """
     Schema2dseq class
diff --git a/test/test_dataset.py b/test/test_dataset.py
index a642345..6fdaa6b 100644
--- a/test/test_dataset.py
+++ b/test/test_dataset.py
@@ -7,10 +7,19 @@
 import pytest
 
 from brukerapi.dataset import Dataset
+from brukerapi.exceptions import UnsuportedDatasetType
 
 data = 0
 
 
+def test_unsupported_dataset_type(tmp_path):
+    path = tmp_path / "unsupported"
+    path.touch()
+
+    with pytest.raises(UnsuportedDatasetType, match="Dataset type: unsupported is not supported"):
+        Dataset(path)
+
+
 @pytest.mark.skip(reason="in progress")
 def test_parameters(test_parameters):
     dataset = Dataset(test_parameters[0], load=False)
diff --git a/test/test_folders.py b/test/test_folders.py
index 91bc0d9..ed183da 100644
--- a/test/test_folders.py
+++ b/test/test_folders.py
@@ -2,7 +2,7 @@
 from brukerapi.folders import Folder, Processing
 
 
-def test_folder_traversal_skips_ser_and_processed_spectra(tmp_path):
+def test_folder_traversal_skips_processed_spectra(tmp_path):
     experiment_path = tmp_path / "1"
     processing_path = experiment_path / "pdata" / "1"
     processing_path.mkdir(parents=True)
@@ -11,7 +11,6 @@ def test_folder_traversal_skips_ser_and_processed_spectra(tmp_path):
         experiment_path / "acqp",
         experiment_path / "method",
         experiment_path / "fid",
-        experiment_path / "ser",
         processing_path / "visu_pars",
         processing_path / "reco",
         processing_path / "2dseq",