diff --git a/LangsteHittegolfPeriode.java b/LangsteHittegolfPeriode.java
new file mode 100644
index 0000000..e8ccb4c
--- /dev/null
+++ b/LangsteHittegolfPeriode.java
@@ -0,0 +1,17 @@
+package weerstation1;
+import java.util.ArrayList;
+
+public class LangsteHittegolfPeriode extends Grootheid{
+    
+    //constructor
+    public LangsteHittegolfPeriode(Measurement measurement1, ArrayList<Measurement> measurement2){
+    	setName("Langste Hittegolf ");
+    	updatePeriod(measurement2);
+    }
+
+    public void updatePeriod(ArrayList<Measurement> list){
+        setPeriod(StatisticsCalculator.langsteHittegolfPeriode(list));
+    }
+    
+
+}