diff --git a/bundles/org.openhab.transform.scale/conf/transform/scale/spektrum.scale b/bundles/org.openhab.transform.scale/conf/transform/scale/spektrum.scale
new file mode 100644
index 0000000000000..c305b82a18add
--- /dev/null
+++ b/bundles/org.openhab.transform.scale/conf/transform/scale/spektrum.scale
@@ -0,0 +1,4 @@
+[..10]=Kaltweiß
+]10..90[=Gemischt
+[90..100]=Warmweiß
+NaN=Unbekannt
diff --git a/bundles/org.openhab.transform.scale/src/main/java/org/openhab/transform/scale/internal/ScaleTransformationService.java b/bundles/org.openhab.transform.scale/src/main/java/org/openhab/transform/scale/internal/ScaleTransformationService.java
index 5e3a5b16095b8..e5afba155c4e0 100644
--- a/bundles/org.openhab.transform.scale/src/main/java/org/openhab/transform/scale/internal/ScaleTransformationService.java
+++ b/bundles/org.openhab.transform.scale/src/main/java/org/openhab/transform/scale/internal/ScaleTransformationService.java
@@ -93,7 +93,7 @@ public Object put(Object key, Object value) {
      * The method transforms the input <code>source</code> by matching searching
      * the range where it fits i.e. [min..max]=value or ]min..max]=value
      *
-     * @param properties the list of properties defining all the available ranges
+     * @param data the list of properties defining all the available ranges
      * @param source the input to transform
      *
      */
@@ -129,7 +129,7 @@ private String formatResult(Map<Range, String> data, String source, final BigDec
 
     private String getScaleResult(Map<Range, String> data, String source, final BigDecimal value)
             throws TransformationException {
-        return data.entrySet().stream().filter(entry -> entry.getKey().contains(value)).findFirst()
+        return data.entrySet().stream().filter(entry -> entry.getKey() != null && entry.getKey().contains(value)).findFirst()
                 .map(Map.Entry::getValue)
                 .orElseThrow(() -> new TransformationException("No matching range for '" + source + "'"));
     }
diff --git a/bundles/org.openhab.transform.scale/src/test/java/org/openhab/transform/scale/internal/ScaleTransformServiceTest.java b/bundles/org.openhab.transform.scale/src/test/java/org/openhab/transform/scale/internal/ScaleTransformServiceTest.java
index a32a786417b67..999c77c772ce8 100644
--- a/bundles/org.openhab.transform.scale/src/test/java/org/openhab/transform/scale/internal/ScaleTransformServiceTest.java
+++ b/bundles/org.openhab.transform.scale/src/test/java/org/openhab/transform/scale/internal/ScaleTransformServiceTest.java
@@ -146,4 +146,12 @@ public void testTransformAndFormat() throws TransformationException {
         String transformedResponse = processor.transform(existingscale, source);
         Assert.assertEquals("Correcte (992) !", transformedResponse);
     }
+
+    @Test
+    public void testValueExceedsRange() throws TransformationException {
+        String existingscale = "scale/spektrum.scale";
+        String source = "2409";
+        String transformedResponse = processor.transform(existingscale, source);
+        Assert.assertEquals("", transformedResponse);
+    }
 }