diff --git a/DDG4/plugins/Geant4RegexSensitivesConstruction.cpp b/DDG4/plugins/Geant4RegexSensitivesConstruction.cpp
index 6bb17fecb..8aa24ed26 100644
--- a/DDG4/plugins/Geant4RegexSensitivesConstruction.cpp
+++ b/DDG4/plugins/Geant4RegexSensitivesConstruction.cpp
@@ -104,7 +104,7 @@ Geant4RegexSensitivesConstruction::collect_volumes(std::set<Volume>&  volumes,
     if( !path.empty() )  {
       for( const auto& match : matches )  {
         std::smatch sm;
-        bool stat = std::regex_match(path, sm, match);
+        bool stat = std::regex_search(path, sm, match);
         if( stat )  {
           volumes.insert(pv.volume());
           ++count;
@@ -151,18 +151,18 @@ void Geant4RegexSensitivesConstruction::constructSensitives(Geant4DetectorConstr
     expressions.emplace_back(e);
   }
   TTimeStamp start;
-  print("+++ Detector: %s Starting to scan volume....", det);
+  info("%s Starting to scan volume....", det);
   std::size_t num_nodes = this->collect_volumes(volumes, de.placement(), de.placementPath(), expressions);
   for( const auto& vol : volumes )  {
     G4LogicalVolume* g4vol = g4info->g4Volumes[vol];
     if( !g4vol )  {
       except("+++ Failed to access G4LogicalVolume for SD %s of type %s", nam.c_str(), typ.c_str());
     }
-    print("+++ Detector: %s Assign sensitive detector [%s] to volume: %s.",
+    debug("%s Assign sensitive detector [%s] to volume: %s.",
           nam.c_str(), typ.c_str(), vol.name());
     ctxt->setSensitiveDetector(g4vol, g4sd);
   }
   TTimeStamp stop;
-  print("+++ Detector: %s Handled %ld nodes with %ld sensitive volume type(s). Total of %7.3f seconds.",
-        det, num_nodes, volumes.size(), stop.AsDouble()-start.AsDouble() );
+  info("%s Handled %ld nodes with %ld sensitive volume type(s). Total of %7.3f seconds.",
+       det, num_nodes, volumes.size(), stop.AsDouble()-start.AsDouble() );
 }
diff --git a/DDG4/python/DDSim/Helper/Geometry.py b/DDG4/python/DDSim/Helper/Geometry.py
index c7c7e85d2..dbc84602a 100644
--- a/DDG4/python/DDSim/Helper/Geometry.py
+++ b/DDG4/python/DDSim/Helper/Geometry.py
@@ -35,8 +35,46 @@ def __init__(self):
 
     self._dumpDGDML_EXTRA = {"help": "If not empty, filename to dump the Geometry as GDML"}
     self.dumpGDML = ""
+
+    self._regexSDDetectorList = []
+
     self._closeProperties()
 
+  @property
+  def regexSensitiveDetector(self):
+    """Configure a sensitive detector for a given detector matched by regular expression (regex).
+
+    'Detector' and 'Match' are mandatory elements of the dictionary, other Keys are assigned as property to the object.
+
+    >>> SIM.geometry.regexSensitiveDetector = {'Detector': 'DRcalo',
+                                               'Match': ['(core|clad)'],
+                                               'OutputLevel': 3,
+                                              }
+
+    This can be assigned repeatedly to add multiple RegexSDs
+    """
+    return self._regexSDDetectorList
+
+  @regexSensitiveDetector.setter
+  def regexSensitiveDetector(self, val):
+    if not val:
+      return
+    if isinstance(val, dict):
+      self.__checkRegexKeys(val)
+      self._regexSDDetectorList.append(val)
+    elif isinstance(val, list):
+      for value in val:
+        self.__checkRegexKeys(value)
+        self._regexSDDetectorList.append(value)
+    raise RuntimeError(f"Unsupported type for regexSensitiveDetector: {val!r}")
+
+  @staticmethod
+  def __checkRegexKeys(val):
+    """Check the regex SD arguments for required keys."""
+    requiredKeys = ('Detector', 'Match')
+    if not all(key in val for key in requiredKeys):
+      raise RuntimeError(f"RegexSD configuration {val} is missing mandatory key(s): {', '.join(requiredKeys)}")
+
   def constructGeometry(self, kernel, geant4, geoPrintLevel=2, numberOfThreads=1):
     """Construct Geant4 geometry."""
     from DDG4 import DetectorConstruction
@@ -60,3 +98,9 @@ def constructGeometry(self, kernel, geant4, geoPrintLevel=2, numberOfThreads=1):
     sensitives = DetectorConstruction(kernel, str('Geant4DetectorSensitivesConstruction/ConstructSD'))
     sensitives.enableUI()
     seq.adopt(sensitives)
+
+    for index, regexDetectors in enumerate(self._regexSDDetectorList):
+      seq, act = geant4.addDetectorConstruction(f'Geant4RegexSensitivesConstruction/ConstrSDRegEx_{index}')
+      # this will set Match and Detector, and other properties if possible
+      for key, value in regexDetectors.items():
+        setattr(act, key, value)
diff --git a/examples/ClientTests/scripts/BoxOfStraws.py b/examples/ClientTests/scripts/BoxOfStraws.py
index f4f5d4a67..00cc33d03 100644
--- a/examples/ClientTests/scripts/BoxOfStraws.py
+++ b/examples/ClientTests/scripts/BoxOfStraws.py
@@ -73,7 +73,7 @@ def run():
     seq, act = geant4.addDetectorConstruction('Geant4RegexSensitivesConstruction/ConstructSDRegEx')
     act.Detector = 'BoxOfStrawsDet'
     act.OutputLevel = Output.ALWAYS
-    act.Match = ['/world_volume_(.*)/BoxOfStrawsDet_(.*)/layer_(.*)/straw_(.*)/gas_(.*)']
+    act.Match = ['gas_']
   #
   seq, act = geant4.addDetectorConstruction('Geant4DetectorConstructionResources/ResourcesAfterConstruction')
   act.When = "sensitives"