diff --git a/src/sampling/Make/files b/src/sampling/Make/files
index 22c32f0eeb..ad272d0e20 100644
--- a/src/sampling/Make/files
+++ b/src/sampling/Make/files
@@ -80,5 +80,6 @@ meshToMesh0/meshToMesh0.C
 meshToMesh0/calculateMeshToMesh0Addressing.C
 meshToMesh0/calculateMeshToMesh0Weights.C
 
+functions/Function1/makeFunction1s.C
 
 LIB = $(FOAM_LIBBIN)/libsampling
diff --git a/src/sampling/functions/Function1/Sample/SampleFunction1.C b/src/sampling/functions/Function1/Sample/SampleFunction1.C
new file mode 100644
index 0000000000..d617ec7d35
--- /dev/null
+++ b/src/sampling/functions/Function1/Sample/SampleFunction1.C
@@ -0,0 +1,185 @@
+/*---------------------------------------------------------------------------*\
+  =========                 |
+  \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
+   \\    /   O peration     |
+    \\  /    A nd           | www.openfoam.com
+     \\/     M anipulation  |
+-------------------------------------------------------------------------------
+    Copyright (C) 2021 OpenCFD Ltd.
+-------------------------------------------------------------------------------
+License
+    This file is part of OpenFOAM.
+
+    OpenFOAM is free software: you can redistribute it and/or modify it
+    under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    OpenFOAM is distributed in the hope that it will be useful, but WITHOUT
+    ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+    FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+    for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with OpenFOAM.  If not, see <http://www.gnu.org/licenses/>.
+
+\*---------------------------------------------------------------------------*/
+
+#include "SampleFunction1.H"
+#include "volFields.H"
+#include "interpolation.H"
+#include "pointIOField.H"
+
+// * * * * * * * * * * * * * Private Member Functions  * * * * * * * * * * * //
+
+template<class Type>
+void Foam::Function1Types::Sample<Type>::setSampleCell() const
+{
+    const polyMesh& mesh = this->template mesh<polyMesh>();
+
+    const auto& points = static_cast<const pointIOField&>(mesh.points());
+
+    if (pointEventNo_ < points.eventNo())
+    {
+        pointEventNo_ = points.eventNo();
+
+        celli_ = this->template mesh<fvMesh>().findCell(position_);
+
+        if (!returnReduce(celli_ != -1, orOp<bool>()))
+        {
+            FatalErrorInFunction
+                << "Sample cell could not be found at position "
+                << position_ << nl
+                << exit(FatalError);
+        }
+
+        if (debug)
+        {
+            Pout<< "Position: " << position_
+                << " celli:" << celli_
+                << " eventNo:" << pointEventNo_
+                << " points eventNo:" << points.eventNo()
+                << endl;
+        }
+    }
+}
+
+
+// * * * * * * * * * * * * * * * * Constructors  * * * * * * * * * * * * * * //
+
+template<class Type>
+Foam::Function1Types::Sample<Type>::Sample
+(
+    const word& entryName,
+    const dictionary& dict,
+    const objectRegistry* obrPtr
+)
+:
+    Function1<Type>(entryName, dict, obrPtr),
+    fieldName_(dict.get<word>("field")),
+    position_(dict.get<point>("position")),
+    interpolationScheme_
+    (
+        dict.getOrDefault<word>("interpolationScheme", "cell")
+    ),
+    celli_(-1),
+    pointEventNo_(-1)
+{}
+
+
+template<class Type>
+Foam::Function1Types::Sample<Type>::Sample(const Sample& s)
+:
+    Function1<Type>(s),
+    fieldName_(s.fieldName_),
+    position_(s.position_),
+    interpolationScheme_(s.interpolationScheme_),
+    celli_(s.celli_),
+    pointEventNo_(s.pointEventNo_)
+{}
+
+
+// * * * * * * * * * * * * * * * Member Functions  * * * * * * * * * * * * * //
+
+template<class Type>
+Type Foam::Function1Types::Sample<Type>::value(const scalar x) const
+{
+    typedef GeometricField<Type, fvPatchField, volMesh> VolFieldType;
+
+    const auto& mesh = this->template mesh<fvMesh>();
+
+    const auto* fieldPtr = mesh.template cfindObject<VolFieldType>(fieldName_);
+
+    if (!fieldPtr)
+    {
+        FatalErrorInFunction
+            << "Unable to find field " << fieldName_ << " on the mesh database"
+            << ". Valid " << VolFieldType::typeName << " fields are:"
+            << mesh.names(VolFieldType::typeName)
+            << exit(FatalError);
+    }
+
+
+    // Might trigger parallel comms (e.g. volPointInterpolation, if
+    // result is not yet cached) so have all processors do it
+    autoPtr<interpolation<Type>> interpolator
+    (
+        interpolation<Type>::New(interpolationScheme_, *fieldPtr)
+    );
+
+    Type result = pTraits<Type>::min;
+
+    setSampleCell();
+
+    if (celli_ != -1)
+    {
+        result = interpolator().interpolate(position_, celli_, -1);
+    }
+
+    reduce(result, maxOp<Type>());
+
+    DebugInfo << "sampled value: " << result << endl;
+
+    return result;
+}
+
+
+template<class Type>
+Type Foam::Function1Types::Sample<Type>::integrate
+(
+    const scalar x1,
+    const scalar x2
+) const
+{
+    NotImplemented;
+
+    return Zero;
+}
+
+
+template<class Type>
+void Foam::Function1Types::Sample<Type>::writeEntries(Ostream& os) const
+{
+    os.writeEntry("field", fieldName_);
+    os.writeEntry("position", position_);
+
+    os.writeEntryIfDifferent<word>
+    (
+        "interpolationScheme", "cell", interpolationScheme_
+    );
+}
+
+
+template<class Type>
+void Foam::Function1Types::Sample<Type>::writeData(Ostream& os) const
+{
+    Function1<Type>::writeData(os);
+    os.endEntry();
+
+    os.beginBlock(word(this->name() + "Coeffs"));
+    writeEntries(os);
+    os.endBlock();
+}
+
+
+// ************************************************************************* //
diff --git a/src/sampling/functions/Function1/Sample/SampleFunction1.H b/src/sampling/functions/Function1/Sample/SampleFunction1.H
new file mode 100644
index 0000000000..11e27aadc4
--- /dev/null
+++ b/src/sampling/functions/Function1/Sample/SampleFunction1.H
@@ -0,0 +1,166 @@
+/*---------------------------------------------------------------------------*\
+  =========                 |
+  \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
+   \\    /   O peration     |
+    \\  /    A nd           | www.openfoam.com
+     \\/     M anipulation  |
+-------------------------------------------------------------------------------
+    Copyright (C) 2021 OpenCFD Ltd.
+-------------------------------------------------------------------------------
+License
+    This file is part of OpenFOAM.
+
+    OpenFOAM is free software: you can redistribute it and/or modify it
+    under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    OpenFOAM is distributed in the hope that it will be useful, but WITHOUT
+    ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+    FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+    for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with OpenFOAM.  If not, see <http://www.gnu.org/licenses/>.
+
+Class
+    Foam::Function1Types::sample
+
+Description
+    Minimal example by using \c system/controlDict.functions:
+    \verbatim
+
+    \verbatim
+        <entryName> sample;
+        <entryName>Coeffs
+        {
+            field           <field name>;
+            position        (0 0 0);
+            interpolationScheme cell;
+        }
+    \endverbatim
+
+SourceFiles
+    sampleFunction1.C
+
+\*---------------------------------------------------------------------------*/
+
+#ifndef Function1Types_Sample_H
+#define Function1Types_Sample_H
+
+#include "Function1.H"
+#include "point.H"
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+namespace Foam
+{
+namespace Function1Types
+{
+
+/*---------------------------------------------------------------------------*\
+                           Class Sample Declaration
+\*---------------------------------------------------------------------------*/
+
+template<class Type>
+class Sample
+:
+    public Function1<Type>
+{
+    // Private Data
+
+        //- Name of field to sample
+        const word fieldName_;
+
+        //- Sample position
+        const point position_;
+
+        //- Interpolation scheme name; default = "cell"
+        const word interpolationScheme_;
+
+        //- Sample cell
+        mutable label celli_;
+
+        //- Points event number used to determine if celli should be updated
+        mutable label pointEventNo_;
+
+
+    // Private Member Functions
+
+        //- Set the sample celli; error on not found
+        void setSampleCell() const;
+
+        //- No copy assignment
+        void operator=(const Sample<Type>&) = delete;
+
+
+public:
+
+    //- Runtime type information
+    TypeName("sample");
+
+
+    // Constructors
+
+        //- Construct from entry name, dictionary and optional registry
+        Sample
+        (
+            const word& entryName,
+            const dictionary& dict,
+            const objectRegistry* obrPtr = nullptr
+        );
+
+        //- Construct from components
+        Sample
+        (
+            const word& entryName,
+            const List<Tuple2<Type, Type>>& coeffs,
+            const objectRegistry* obrPtr = nullptr
+        );
+
+        //- Copy constructor
+        explicit Sample(const Sample& poly);
+
+        //- Construct and return a clone
+        virtual tmp<Function1<Type>> clone() const
+        {
+            return tmp<Function1<Type>>(new Sample<Type>(*this));
+        }
+
+
+    //- Destructor
+    virtual ~Sample() = default;
+
+
+    // Member Functions
+
+        //- Return Sample value
+        virtual Type value(const scalar x) const;
+
+        //- Integrate between two (scalar) values
+        virtual Type integrate(const scalar x1, const scalar x2) const;
+
+        //- Write as primitive (inline) format
+        virtual void writeData(Ostream& os) const;
+
+        //- Write coefficient entries in dictionary format
+        void writeEntries(Ostream& os) const;
+};
+
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+} // End namespace Function1Types
+} // End namespace Foam
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+#ifdef NoRepository
+    #include "SampleFunction1.C"
+#endif
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+#endif
+
+// ************************************************************************* //
diff --git a/src/sampling/functions/Function1/makeFunction1s.C b/src/sampling/functions/Function1/makeFunction1s.C
new file mode 100644
index 0000000000..7739a872e7
--- /dev/null
+++ b/src/sampling/functions/Function1/makeFunction1s.C
@@ -0,0 +1,46 @@
+/*---------------------------------------------------------------------------*\
+  =========                 |
+  \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
+   \\    /   O peration     |
+    \\  /    A nd           | www.openfoam.com
+     \\/     M anipulation  |
+-------------------------------------------------------------------------------
+    Copyright (C) 2021 OpenCFD Ltd.
+-------------------------------------------------------------------------------
+License
+    This file is part of OpenFOAM.
+
+    OpenFOAM is free software: you can redistribute it and/or modify it
+    under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    OpenFOAM is distributed in the hope that it will be useful, but WITHOUT
+    ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+    FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+    for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with OpenFOAM.  If not, see <http://www.gnu.org/licenses/>.
+
+\*---------------------------------------------------------------------------*/
+
+#include "SampleFunction1.H"
+#include "fieldTypes.H"
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+#define makeFunction1s(Type)                                                   \
+    makeFunction1Type(Sample, Type);
+
+namespace Foam
+{
+    makeFunction1s(scalar);
+    makeFunction1s(vector);
+    makeFunction1s(sphericalTensor);
+    makeFunction1s(symmTensor);
+    makeFunction1s(tensor);
+}
+
+
+// ************************************************************************* //