diff --git a/src/sampling/sampledSet/uniform/uniformSet.C b/src/sampling/sampledSet/uniform/uniformSet.C
index 0bc3d319cb..397ee24b01 100644
--- a/src/sampling/sampledSet/uniform/uniformSet.C
+++ b/src/sampling/sampledSet/uniform/uniformSet.C
@@ -6,6 +6,7 @@
      \\/     M anipulation  |
 -------------------------------------------------------------------------------
     Copyright (C) 2011-2016 OpenFOAM Foundation
+    Copyright (C) 2021 OpenCFD Ltd.
 -------------------------------------------------------------------------------
 License
     This file is part of OpenFOAM.
@@ -40,8 +41,6 @@ namespace Foam
     addToRunTimeSelectionTable(sampledSet, uniformSet, word);
 }
 
-const Foam::scalar Foam::uniformSet::tol = 1e-3;
-
 
 // * * * * * * * * * * * * * Private Member Functions  * * * * * * * * * * * //
 
@@ -93,7 +92,7 @@ bool Foam::uniformSet::trackToBoundary
 {
     // distance vector between sampling points
     const vector offset = (end_ - start_)/(nPoints_ - 1);
-    const vector smallVec = tol*offset;
+    const vector smallVec(tol_*offset);
     const scalar smallDist = mag(smallVec);
 
     point trackPt = singleParticle.position();
@@ -207,7 +206,7 @@ void Foam::uniformSet::calcSamples
 
     const vector offset = (end_ - start_)/(nPoints_ - 1);
     const vector normOffset = offset/mag(offset);
-    const vector smallVec = tol*offset;
+    const vector smallVec(tol_*offset);
     const scalar smallDist = mag(smallVec);
 
     // Force calculation of cloud addressing on all processors
@@ -429,6 +428,7 @@ Foam::uniformSet::uniformSet
     sampledSet(name, mesh, searchEngine, axis),
     start_(start),
     end_(end),
+    tol_(1e-3),
     nPoints_(nPoints)
 {
     genSamples();
@@ -446,6 +446,7 @@ Foam::uniformSet::uniformSet
     sampledSet(name, mesh, searchEngine, dict),
     start_(dict.get<point>("start")),
     end_(dict.get<point>("end")),
+    tol_(dict.getCheckOrDefault<scalar>("tol", 1e-3, scalarMinMax::ge(0))),
     nPoints_(dict.get<label>("nPoints"))
 {
     genSamples();
diff --git a/src/sampling/sampledSet/uniform/uniformSet.H b/src/sampling/sampledSet/uniform/uniformSet.H
index f987563e2d..4654b72a60 100644
--- a/src/sampling/sampledSet/uniform/uniformSet.H
+++ b/src/sampling/sampledSet/uniform/uniformSet.H
@@ -6,6 +6,7 @@
      \\/     M anipulation  |
 -------------------------------------------------------------------------------
     Copyright (C) 2011-2016 OpenFOAM Foundation
+    Copyright (C) 2021 OpenCFD Ltd.
 -------------------------------------------------------------------------------
 License
     This file is part of OpenFOAM.
@@ -63,7 +64,7 @@ class uniformSet
 :
     public sampledSet
 {
-    // Private data
+    // Private Data
 
         //- Starting point
         point start_;
@@ -71,9 +72,14 @@ class uniformSet
         //- End point
         point end_;
 
+        //- Relative tolerance when comparing points
+        //- relative to difference between start_ and end_
+        scalar tol_;
+
         //- Number of points
         label nPoints_;
 
+
     // Private Member Functions
 
         //- Calculates - starting at samplePt - the first sampling point
@@ -125,13 +131,6 @@ public:
     TypeName("uniform");
 
 
-    // Static data
-
-        //- Tolerance when comparing points relative to difference between
-        //  start_ and end_
-        static const scalar tol;
-
-
     // Constructors
 
         //- Construct from components