diff --git a/pyproject.toml b/pyproject.toml
index fa819adb..984758ed 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -106,7 +106,6 @@ quote-style = "single"
 "*test_*.py" = ["S101"]
 
 [tool.ruff.lint]
-ignore-init-module-imports = true
 select = [
     # flake8 settings from existing CI setup
     "E9", "F63", "F7", "F82",
diff --git a/src/easyreflectometry/calculators/calculator_base.py b/src/easyreflectometry/calculators/calculator_base.py
index 6a620fc5..1be7b568 100644
--- a/src/easyreflectometry/calculators/calculator_base.py
+++ b/src/easyreflectometry/calculators/calculator_base.py
@@ -7,6 +7,7 @@
 from easyscience.fitting.calculators.interface_factory import ItemContainer
 from easyscience.io import SerializerComponent
 
+#if TYPE_CHECKING:
 from easyreflectometry.model import Model
 from easyreflectometry.sample import BaseAssembly
 from easyreflectometry.sample import Layer
diff --git a/src/easyreflectometry/data/data_store.py b/src/easyreflectometry/data/data_store.py
index f176c014..8dde0bf7 100644
--- a/src/easyreflectometry/data/data_store.py
+++ b/src/easyreflectometry/data/data_store.py
@@ -9,7 +9,6 @@
 from easyscience.io import SerializerComponent
 from easyscience.io import SerializerDict
 
-# from easyscience.utils.io.dict import DictSerializer
 from easyreflectometry.model import Model
 
 T = TypeVar('T')
@@ -77,7 +76,7 @@ def __init__(
         y: Optional[Union[np.ndarray, list]] = None,
         ye: Optional[Union[np.ndarray, list]] = None,
         xe: Optional[Union[np.ndarray, list]] = None,
-        model: Optional[Model] = None,
+        model: Optional['Model'] = None, # delay type checking until runtime (quotes)
         x_label: str = 'x',
         y_label: str = 'y',
     ):
@@ -118,11 +117,11 @@ def __init__(
         self._color = None
 
     @property
-    def model(self) -> Model:
+    def model(self) -> 'Model': # delay type checking until runtime (quotes)
         return self._model
 
     @model.setter
-    def model(self, new_model: Model) -> None:
+    def model(self, new_model: 'Model') -> None:
         self._model = new_model
         self._model.background = np.min(self.y)
 
diff --git a/src/easyreflectometry/data/measurement.py b/src/easyreflectometry/data/measurement.py
index 1ba4addc..b24f32a8 100644
--- a/src/easyreflectometry/data/measurement.py
+++ b/src/easyreflectometry/data/measurement.py
@@ -6,10 +6,9 @@
 
 import numpy as np
 import scipp as sc
-from orsopy.fileio import Header
-from orsopy.fileio import orso
 
 from easyreflectometry.data import DataSet1D
+from easyreflectometry.orso_utils import load_data_from_orso_file
 
 
 def load(fname: Union[TextIO, str]) -> sc.DataGroup:
@@ -18,7 +17,7 @@ def load(fname: Union[TextIO, str]) -> sc.DataGroup:
     :param fname: The file to be read.
     """
     try:
-        return _load_orso(fname)
+        return load_data_from_orso_file(fname)
     except (IndexError, ValueError):
         return _load_txt(fname)
 
@@ -39,42 +38,6 @@ def load_as_dataset(fname: Union[TextIO, str]) -> DataSet1D:
     )
 
 
-def _load_orso(fname: Union[TextIO, str]) -> sc.DataGroup:
-    """Load from an ORSO compatible file.
-
-    :param fname: The path for the file to be read.
-    """
-    data = {}
-    coords = {}
-    attrs = {}
-    f_data = orso.load_orso(fname)
-    for i, o in enumerate(f_data):
-        name = i
-        if o.info.data_set is not None:
-            name = o.info.data_set
-        coords[f'Qz_{name}'] = sc.array(
-            dims=[f'{o.info.columns[0].name}_{name}'],
-            values=o.data[:, 0],
-            variances=np.square(o.data[:, 3]),
-            unit=sc.Unit(o.info.columns[0].unit),
-        )
-        try:
-            data[f'R_{name}'] = sc.array(
-                dims=[f'{o.info.columns[0].name}_{name}'],
-                values=o.data[:, 1],
-                variances=np.square(o.data[:, 2]),
-                unit=sc.Unit(o.info.columns[1].unit),
-            )
-        except TypeError:
-            data[f'R_{name}'] = sc.array(
-                dims=[f'{o.info.columns[0].name}_{name}'],
-                values=o.data[:, 1],
-                variances=np.square(o.data[:, 2]),
-            )
-        attrs[f'R_{name}'] = {'orso_header': sc.scalar(Header.asdict(o.info))}
-    return sc.DataGroup(data=data, coords=coords, attrs=attrs)
-
-
 def _load_txt(fname: Union[TextIO, str]) -> sc.DataGroup:
     """Load data from a simple txt file.
 
diff --git a/src/easyreflectometry/model/model.py b/src/easyreflectometry/model/model.py
index adca5cf6..6f7a203c 100644
--- a/src/easyreflectometry/model/model.py
+++ b/src/easyreflectometry/model/model.py
@@ -208,6 +208,12 @@ def as_dict(self, skip: Optional[list[str]] = None) -> dict:
             this_dict['interface'] = self.interface().name
         return this_dict
 
+    def as_orso(self) -> dict:
+        """Convert the model to a dictionary suitable for ORSO."""
+        this_dict = self.as_dict()
+
+        return this_dict
+
     @classmethod
     def from_dict(cls, passed_dict: dict) -> Model:
         """
diff --git a/src/easyreflectometry/orso_utils.py b/src/easyreflectometry/orso_utils.py
new file mode 100644
index 00000000..23756eba
--- /dev/null
+++ b/src/easyreflectometry/orso_utils.py
@@ -0,0 +1,155 @@
+import logging
+
+import numpy as np
+import scipp as sc
+from orsopy.fileio import Header
+from orsopy.fileio import model_language
+from orsopy.fileio import orso
+from orsopy.fileio.base import ComplexValue
+
+from easyreflectometry.data import DataSet1D
+
+from .sample.assemblies.multilayer import Multilayer
+from .sample.collections.sample import Sample
+from .sample.elements.layers.layer import Layer
+from .sample.elements.materials.material import Material
+from .sample.elements.materials.material_density import MaterialDensity
+
+# Set up logging
+logger = logging.getLogger(__name__)
+
+
+def LoadOrso(orso_str: str):
+    """Load a model from an ORSO file."""
+
+    sample = load_orso_model(orso_str)
+    data = load_orso_data(orso_str)
+
+    return sample, data
+
+def load_data_from_orso_file(fname: str) -> sc.DataGroup:
+    """Load data from an ORSO file."""
+    try:
+        orso_data = orso.load_orso(fname)
+    except Exception as e:
+        raise ValueError(f"Error loading ORSO file: {e}")
+    return load_orso_data(orso_data)
+
+def load_orso_model(orso_str: str) -> Sample:
+    """
+    Load a model from an ORSO file and return a Sample object.
+
+    The ORSO file .ort contains information about the sample, saved
+    as a simple "stack" string, e.g. 'air | m1 | SiO2 | Si'.
+    This gets parsed by the ORSO library and converted into an ORSO Dataset object.
+
+    Args:
+        orso_str: The ORSO file content as a string
+
+    Returns:
+        Sample: An EasyReflectometry Sample object
+
+    Raises:
+        ValueError: If ORSO layers could not be resolved
+    """
+    # Extract stack string and create ORSO sample model
+    stack_str = orso_str[0].info.data_source.sample.model.stack
+    orso_sample = model_language.SampleModel(stack=stack_str)
+
+    # Try to resolve layers using different methods
+    try:
+        orso_layers = orso_sample.resolve_to_layers()
+    except ValueError:
+        orso_layers = orso_sample.resolve_stack()
+
+    # Handle case where layers are not resolved correctly
+    if not orso_layers:
+        raise ValueError("Could not resolve ORSO layers.")
+
+    logger.debug(f"Resolved layers: {orso_layers}")
+
+    # Convert ORSO layers to EasyReflectometry layers
+    erl_layers = []
+    for layer in orso_layers:
+        erl_layer = _convert_orso_layer_to_erl(layer)
+        erl_layers.append(erl_layer)
+
+    # Create a Multilayer object with the extracted layers
+    multilayer = Multilayer(erl_layers, name='Multi Layer Sample from ORSO')
+
+    # Create Sample from the file
+    sample_info = orso_str[0].info.data_source.sample
+    sample_name = sample_info.name if sample_info.name else 'ORSO Sample'
+    sample = Sample(multilayer, name=sample_name)
+
+    return sample
+
+
+def _convert_orso_layer_to_erl(layer):
+    """Helper function to convert an ORSO layer to an EasyReflectometry layer"""
+    material = layer.material
+    m_name = material.formula if material.formula is not None else layer.name
+
+    # Get SLD values
+    m_sld, m_isld = _get_sld_values(material, m_name)
+
+    # Create and return ERL layer
+    return Layer(
+        material=Material(sld=m_sld, isld=m_isld, name=m_name),
+        thickness=layer.thickness.magnitude if layer.thickness is not None else 0.0,
+        roughness=layer.roughness.magnitude if layer.roughness is not None else 0.0,
+        name=layer.original_name if layer.original_name is not None else m_name
+    )
+
+
+def _get_sld_values(material, material_name):
+    """Extract SLD values from material, calculating from density if needed"""
+    if material.sld is None and material.mass_density is not None:
+        # Calculate SLD from mass density
+        m_density = material.mass_density.magnitude
+        density = MaterialDensity(
+            chemical_structure=material_name,
+            density=m_density
+        )
+        m_sld = density.sld.value
+        m_isld = density.isld.value
+    else:
+        if isinstance(material.sld, ComplexValue):
+            m_sld = material.sld.real
+            m_isld = material.sld.imag
+        else:
+            m_sld = material.sld
+            m_isld = 0.0
+
+    return m_sld, m_isld
+
+def load_orso_data(orso_str: str) -> DataSet1D:
+    data = {}
+    coords = {}
+    attrs = {}
+    for i, o in enumerate(orso_str):
+        name = i
+        if o.info.data_set is not None:
+            name = o.info.data_set
+        coords[f'Qz_{name}'] = sc.array(
+            dims=[f'{o.info.columns[0].name}_{name}'],
+            values=o.data[:, 0],
+            variances=np.square(o.data[:, 3]),
+            unit=sc.Unit(o.info.columns[0].unit),
+        )
+        try:
+            data[f'R_{name}'] = sc.array(
+                dims=[f'{o.info.columns[0].name}_{name}'],
+                values=o.data[:, 1],
+                variances=np.square(o.data[:, 2]),
+                unit=sc.Unit(o.info.columns[1].unit),
+            )
+        except TypeError:
+            data[f'R_{name}'] = sc.array(
+                dims=[f'{o.info.columns[0].name}_{name}'],
+                values=o.data[:, 1],
+                variances=np.square(o.data[:, 2]),
+            )
+        attrs[f'R_{name}'] = {'orso_header': sc.scalar(Header.asdict(o.info))}
+    data_group = sc.DataGroup(data=data, coords=coords, attrs=attrs)
+    return data_group
diff --git a/src/easyreflectometry/project.py b/src/easyreflectometry/project.py
index 70c3cd36..b2487bb2 100644
--- a/src/easyreflectometry/project.py
+++ b/src/easyreflectometry/project.py
@@ -254,6 +254,22 @@ def get_index_d2o(self) -> int:
             self._materials.add_material(Material(name='D2O', sld=6.36, isld=0.0))
         return [material.name for material in self._materials].index('D2O')
 
+    def load_orso_file(self, path: Union[Path, str]) -> None:
+        """Load an ORSO file and optionally create a model and a data from it."""
+        from easyreflectometry.orso_utils import LoadOrso
+
+        model, data = LoadOrso(path)
+        if model is not None:
+            self.models = ModelCollection([model])
+        else:
+            self.default_model()
+        if data is not None:
+            self._experiments[0] = data
+            self._experiments[0].name = 'Experiment from ORSO'
+            self._experiments[0].model = self.models[0]
+            self._with_experiments = True
+
+        pass
     def load_new_experiment(self, path: Union[Path, str]) -> None:
         new_experiment = load_as_dataset(str(path))
         new_index = len(self._experiments)
diff --git a/src/easyreflectometry/utils.py b/src/easyreflectometry/utils.py
index 75c3abae..43be7821 100644
--- a/src/easyreflectometry/utils.py
+++ b/src/easyreflectometry/utils.py
@@ -54,22 +54,24 @@ def yaml_dump(dict_repr: dict) -> str:
     return yaml.dump(dict_repr, sort_keys=False, allow_unicode=True)
 
 
-def collect_unique_names_from_dict(structure_dict: dict, unique_names: Optional[list[str]] = None) -> dict:
+def collect_unique_names_from_dict(structure_dict: dict, unique_names: Optional[list[str]] = None) -> list[str]:
     """
     This function returns a list with the 'unique_name' found the input dictionary.
     """
     if unique_names is None:
         unique_names = []
 
-    if isinstance(structure_dict, dict):
-        for key, value in structure_dict.items():
-            if isinstance(value, dict):
-                collect_unique_names_from_dict(value, unique_names)
-            elif isinstance(value, list):
-                for element in value:
-                    collect_unique_names_from_dict(element, unique_names)
-            if key == 'unique_name':
-                unique_names.append(value)
+    def _collect(item):
+        if isinstance(item, dict):
+            if 'unique_name' in item:
+                unique_names.append(item['unique_name'])
+            for value in item.values():
+                _collect(value)
+        elif isinstance(item, list):
+            for element in item:
+                _collect(element)
+
+    _collect(structure_dict)
     return unique_names
 
 
diff --git a/tests/_static/Ni_example.ort b/tests/_static/Ni_example.ort
new file mode 100644
index 00000000..d5ff67e7
--- /dev/null
+++ b/tests/_static/Ni_example.ort
@@ -0,0 +1,408 @@
+# # ORSO reflectivity data file | 1.1 standard | YAML encoding | https://www.reflectometry.org/
+# data_source:
+#   owner:
+#     name: Joe Bloggs
+#     affiliation: Unseen University
+#   experiment:
+#     title: Metal films
+#     instrument: Platypus
+#     start_date: 2025-04-08T00:00:00
+#     probe: neutron
+#     facility: ANSTO
+#     proposalID: '1234'
+#   sample:
+#     name: Ni on Si
+#     category: from air
+#     description: ~1000 A of metal
+#     model:
+#       stack: air | m1 | SiO2 | Si
+#       layers:
+#         air:
+#           thickness: 0.0
+#           roughness: 0.0
+#           material:
+#             sld: {real: 0.0, imag: 0.0}
+#         m1:
+#           thickness: 1000.0
+#           roughness: 4.0
+#           material:
+#             formula: Ni
+#             mass_density: 8.9
+#         SiO2:
+#           thickness: 10.0
+#           roughness: 3.0
+#           material:
+#             sld: {real: 3.4700000000000002e-06, imag: 0.0}
+#         Si:
+#           thickness: 0.0
+#           roughness: 3.5
+#           material:
+#             sld: {real: 2.0699999999999997e-06, imag: 0.0}
+#       globals:
+#         roughness: {magnitude: 0.3, unit: nm}
+#         length_unit: angstrom
+#         mass_density_unit: g/cm^3
+#         number_density_unit: 1/nm^3
+#         sld_unit: 1/angstrom^2
+#         magnetic_moment_unit: muB
+#       reference: ORSO model language | 1.0
+#   measurement:
+#     instrument_settings:
+#       incident_angle: {min: 0.8, max: 3.5, individual_magnitudes: [0.8, 3.5]}
+#       wavelength: {min: 2.8, max: 19.0}
+#       polarization: unpolarized
+#     data_files:
+#     - PLP000001.nx.hdf
+#     - PLP000002.nx.hdf
+#     - PLP0049278.nx.hdf
+#     - PLP0049278.nx.hdf
+# reduction:
+#   software: {name: null}
+# data_set: 0
+# columns:
+# - {name: Qz, unit: 1/angstrom, physical_quantity: wavevector transfer}
+# - {name: R, physical_quantity: reflectivity}
+# - {error_of: R, error_type: uncertainty, value_is: sigma}
+# - {error_of: Qz, error_type: resolution, value_is: sigma}
+# # Qz (1/angstrom)    R                      sR                     sQz                   
+9.2345234388222733e-03 1.0226067496929858e+00 1.1170591114247284e-01 1.9607872088547379e-04
+9.3270815887540274e-03 1.0302767445066796e+00 8.7740064001103457e-02 1.9804402897813036e-04
+9.4205674542496166e-03 1.0039484579143043e+00 8.1560737197910890e-02 2.0002903546478720e-04
+9.5149903338545283e-03 9.8638695256781528e-01 7.2036173798839573e-02 2.0203393778355975e-04
+9.6103596193140937e-03 1.0159129527874478e+00 6.9679978071114715e-02 2.0405893535149682e-04
+9.7066847965076447e-03 9.9807289905163554e-01 6.8322380250923700e-02 2.0610422958441577e-04
+9.8039754463920114e-03 1.0118422604265040e+00 6.6119431576221452e-02 2.0817002391693588e-04
+9.9022412459544972e-03 9.8326004456477312e-01 6.0085041363151265e-02 2.1025652382271315e-04
+1.0001491969175397e-02 9.9345781265609967e-01 5.6758191132873302e-02 2.1236393683487766e-04
+1.0101737488000164e-02 9.5390591334203079e-01 5.3389009586286063e-02 2.1449247256667583e-04
+1.0202987773321310e-02 1.0280799159994747e+00 5.3960452935320119e-02 2.1664234273231932e-04
+1.0305252895970170e-02 1.0240559926586563e+00 5.3546127784158924e-02 2.1881376116804338e-04
+1.0408543027718592e-02 9.6142392942081001e-01 5.1408956499695284e-02 2.2100694385337593e-04
+1.0512868442290667e-02 9.8598982245362687e-01 5.1238043677378491e-02 2.2322210893261995e-04
+1.0618239516384607e-02 9.9771821971933494e-01 4.7845475252791071e-02 2.2545947673655104e-04
+1.0724666730704845e-02 1.0004491683361785e+00 4.6649437246202123e-02 2.2771926980433255e-04
+1.0832160671004516e-02 1.0104022731685744e+00 4.4731121260150858e-02 2.3000171290565052e-04
+1.0940732029138353e-02 9.9779785954886413e-01 4.2272693614001246e-02 2.3230703306307020e-04
+1.1050391604126159e-02 1.0055765686454907e+00 4.2091997673492705e-02 2.3463545957461693e-04
+1.1161150303226907e-02 1.0215476539811454e+00 4.3316952678977311e-02 2.3698722403658290e-04
+1.1273019143023654e-02 9.9179624949559697e-01 4.3205628682669729e-02 2.3936256036656309e-04
+1.1386009250519294e-02 9.9557002421276131e-01 4.1228076206464730e-02 2.4176170482672189e-04
+1.1500131864243290e-02 1.0117785655957505e+00 4.0333676962068431e-02 2.4418489604729256e-04
+1.1615398335369528e-02 9.7082084841886729e-01 3.7302065673985856e-02 2.4663237505031274e-04
+1.1731820128845348e-02 9.8972115580681308e-01 3.6119493472381345e-02 2.4910438527359752e-04
+1.1849408824531903e-02 1.0214482057249348e+00 3.6602865849168845e-02 2.5160117259495293e-04
+1.1968176118355954e-02 1.0062226288284248e+00 3.5810839565481131e-02 2.5412298535663230e-04
+1.2088133823473188e-02 1.0094821254146633e+00 3.5663573177725803e-02 2.5667007439003712e-04
+1.2209293871443226e-02 9.9328904517439520e-01 3.3890468638232349e-02 2.5924269304066644e-04
+1.2331668313416380e-02 9.9595106264864630e-01 3.3042227611611054e-02 2.6184109719331537e-04
+1.2455269321332327e-02 9.6970753452708558e-01 3.2412524189650627e-02 2.6446554529752694e-04
+1.2580109189130776e-02 9.8580467285213969e-01 3.3200232581555703e-02 2.6711629839329832e-04
+1.2706200333974293e-02 1.0110779814586568e+00 3.2502675385061602e-02 2.6979362013704550e-04
+1.2833555297483368e-02 1.0006234159785823e+00 3.1139905281436866e-02 2.7249777682782761e-04
+1.2962186746983854e-02 1.0028891555408590e+00 3.0904330346290781e-02 2.7522903743383418e-04
+1.3092107476766934e-02 1.0109874864527066e+00 3.0674448813075725e-02 2.7798767361913822e-04
+1.3223330409361685e-02 9.9993528898466988e-01 2.9008037318591088e-02 2.8077395977071695e-04
+1.3355868596820433e-02 1.0009062224492562e+00 2.9627872964887707e-02 2.8358817302574389e-04
+1.3489735222016954e-02 1.0051948111274847e+00 2.9037997918434449e-02 2.8643059329915395e-04
+1.3624943599957718e-02 1.0100574086007807e+00 2.9021067137744449e-02 2.8930150331148548e-04
+1.3761507179106250e-02 1.0070363426604387e+00 2.7845257813301300e-02 2.9220118861700040e-04
+1.3899439542720791e-02 1.0228789801753368e+00 2.7624839439227691e-02 2.9512993763208752e-04
+1.4038754410205342e-02 9.8120620658005386e-01 2.5908532689742612e-02 2.9808804166394905e-04
+1.4179465638474272e-02 9.9091687911414772e-01 2.5669010973521342e-02 3.0107579493957607e-04
+1.4321587223330573e-02 1.0100578304005647e+00 2.6779911419012009e-02 3.0409349463501303e-04
+1.4465133300857969e-02 1.0212211311592154e+00 2.5503666679671837e-02 3.0714144090491699e-04
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diff --git a/tests/test_data.py b/tests/test_data.py
index 6657d1ce..c16aa259 100644
--- a/tests/test_data.py
+++ b/tests/test_data.py
@@ -12,11 +12,11 @@
 
 import easyreflectometry
 from easyreflectometry.data import DataSet1D
-from easyreflectometry.data.measurement import _load_orso
 from easyreflectometry.data.measurement import _load_txt
 from easyreflectometry.data.measurement import load
 from easyreflectometry.data.measurement import load_as_dataset
 from easyreflectometry.data.measurement import merge_datagroups
+from easyreflectometry.orso_utils import load_data_from_orso_file
 
 PATH_STATIC = os.path.join(os.path.dirname(easyreflectometry.__file__), '..', '..', 'tests', '_static')
 
@@ -55,7 +55,7 @@ def test_load_with_txt_commas(self):
 
     def test_orso1(self):
         fpath = os.path.join(PATH_STATIC, 'test_example1.ort')
-        er_data = _load_orso(fpath)
+        er_data = load_data_from_orso_file(fpath)
         o_data = load_orso(fpath)
         assert er_data['attrs']['R_spin_up']['orso_header'].value == Header.asdict(o_data[0].info)
         assert_almost_equal(er_data['data']['R_spin_up'].values, o_data[0].data[:, 1])
@@ -65,7 +65,7 @@ def test_orso1(self):
 
     def test_orso2(self):
         fpath = os.path.join(PATH_STATIC, 'test_example2.ort')
-        er_data = _load_orso(fpath)
+        er_data = load_data_from_orso_file(fpath)
         o_data = load_orso(fpath)
         for i, o in enumerate(list(reversed(o_data))):
             assert er_data['attrs'][f'R_{o.info.data_set}']['orso_header'].value == Header.asdict(o.info)
@@ -76,7 +76,7 @@ def test_orso2(self):
 
     def test_orso3(self):
         fpath = os.path.join(PATH_STATIC, 'test_example3.ort')
-        er_data = _load_orso(fpath)
+        er_data = load_data_from_orso_file(fpath)
         o_data = load_orso(fpath)
         for i, o in enumerate(o_data):
             assert er_data['attrs'][f'R_{o.info.data_set}']['orso_header'].value == Header.asdict(o.info)
@@ -87,7 +87,7 @@ def test_orso3(self):
 
     def test_orso4(self):
         fpath = os.path.join(PATH_STATIC, 'test_example4.ort')
-        er_data = _load_orso(fpath)
+        er_data = load_data_from_orso_file(fpath)
         o_data = load_orso(fpath)
         for i, o in enumerate(o_data):
             print(list(er_data.keys()))
@@ -258,7 +258,7 @@ def test_load_txt_insufficient_columns(self):
 
     def test_load_orso_multiple_datasets(self):
         fpath = os.path.join(PATH_STATIC, 'test_example2.ort')
-        er_data = _load_orso(fpath)
+        er_data = load_data_from_orso_file(fpath)
 
         # Should handle multiple datasets
         assert len(er_data['data']) > 1
@@ -276,7 +276,7 @@ def test_load_orso_multiple_datasets(self):
 
     def test_load_orso_with_attrs(self):
         fpath = os.path.join(PATH_STATIC, 'test_example1.ort')
-        er_data = _load_orso(fpath)
+        er_data = load_data_from_orso_file(fpath)
 
         # Should have attrs with ORSO headers
         assert 'attrs' in er_data
@@ -286,7 +286,7 @@ def test_load_orso_with_attrs(self):
 
     def test_load_orso_with_units(self):
         fpath = os.path.join(PATH_STATIC, 'test_example1.ort')
-        er_data = _load_orso(fpath)
+        er_data = load_data_from_orso_file(fpath)
 
         # Coords should have units
         for coord_key in er_data['coords']:
@@ -295,7 +295,7 @@ def test_load_orso_with_units(self):
             assert hasattr(coord_data, 'unit')
 
     def test_load_fallback_to_txt(self):
-        # Test that load() falls back to _load_txt when _load_orso fails
+        # Test that load() falls back to _load_txt when load_data_from_orso_file fails
         fpath = os.path.join(PATH_STATIC, 'test_example1.txt')
         result = load(fpath)
 
diff --git a/tests/test_measurement_comprehensive.py b/tests/test_measurement_comprehensive.py
index e3d96277..3842fbb5 100644
--- a/tests/test_measurement_comprehensive.py
+++ b/tests/test_measurement_comprehensive.py
@@ -17,11 +17,11 @@
 from easyreflectometry.data.data_store import DataSet1D
 from easyreflectometry.data.data_store import DataStore
 from easyreflectometry.data.data_store import ProjectData
-from easyreflectometry.data.measurement import _load_orso
 from easyreflectometry.data.measurement import _load_txt
 from easyreflectometry.data.measurement import load
 from easyreflectometry.data.measurement import load_as_dataset
 from easyreflectometry.data.measurement import merge_datagroups
+from easyreflectometry.orso_utils import load_data_from_orso_file
 
 PATH_STATIC = os.path.join(os.path.dirname(easyreflectometry.__file__), '..', '..', 'tests', '_static')
 
@@ -132,7 +132,7 @@ def test_load_txt_with_insufficient_columns(self):
     def test_load_orso_with_multiple_datasets(self):
         """Test that _load_orso handles files with multiple datasets."""
         fpath = os.path.join(PATH_STATIC, 'test_example2.ort')
-        result = _load_orso(fpath)
+        result = load_data_from_orso_file(fpath)
         
         # Should have multiple data entries
         assert len(result['data']) > 1
@@ -141,7 +141,7 @@ def test_load_orso_with_multiple_datasets(self):
     def test_load_orso_preserves_metadata(self):
         """Test that _load_orso preserves ORSO metadata in attrs."""
         fpath = os.path.join(PATH_STATIC, 'test_example1.ort')
-        result = _load_orso(fpath)
+        result = load_data_from_orso_file(fpath)
         
         assert 'attrs' in result
         # Should have orso_header in attrs
diff --git a/tests/test_orso_utils.py b/tests/test_orso_utils.py
new file mode 100644
index 00000000..89dd07db
--- /dev/null
+++ b/tests/test_orso_utils.py
@@ -0,0 +1,53 @@
+# SPDX-License-Identifier: BSD-3-Clause
+# Copyright (c) 2025 DMSC
+
+import os
+
+import pytest
+from orsopy.fileio import orso
+
+import easyreflectometry
+from easyreflectometry.orso_utils import LoadOrso
+from easyreflectometry.orso_utils import load_data_from_orso_file
+from easyreflectometry.orso_utils import load_orso_data
+from easyreflectometry.orso_utils import load_orso_model
+
+PATH_STATIC = os.path.join(os.path.dirname(easyreflectometry.__file__), '..', '..', 'tests', '_static')
+
+
+@pytest.fixture
+def orso_data():
+    """Load the test ORSO data from Ni_example.ort."""
+    return orso.load_orso(os.path.join(PATH_STATIC, "Ni_example.ort"))
+
+
+def test_load_orso_model(orso_data):
+    """Test loading a model from ORSO data."""
+    sample = load_orso_model(orso_data)
+    assert sample is not None
+    assert sample.name == "Ni on Si"  # Based on the file
+
+
+def test_load_orso_data(orso_data):
+    """Test loading data from ORSO data."""
+    data = load_orso_data(orso_data)
+    assert data is not None
+    # Check structure, e.g., has R_0 in data
+    assert "R_0" in data["data"]
+
+
+def test_LoadOrso(orso_data):
+    """Test the LoadOrso function."""
+    sample, data = LoadOrso(orso_data)
+    assert sample is not None
+    assert data is not None
+    # Similar checks as above
+
+
+def test_load_data_from_orso_file():
+    """Test loading data from ORSO file."""
+    data = load_data_from_orso_file(os.path.join(PATH_STATIC, "Ni_example.ort"))
+    assert data is not None
+    # Check it's a sc.DataGroup
+    import scipp as sc
+    assert isinstance(data, sc.DataGroup)
\ No newline at end of file