diff --git a/.env.development b/.env.development
index e073638..08eae02 100644
--- a/.env.development
+++ b/.env.development
@@ -6,6 +6,6 @@ NEXT_PUBLIC_USE_MOCK_BACKEND_LOOP_START=false
 NEXT_PUBLIC_EXPORT_STATIC=false
 NEXT_PUBLIC_USE_CGI=false
 # App-Versionsnummer
-NEXT_PUBLIC_APP_VERSION=1.6.607
+NEXT_PUBLIC_APP_VERSION=1.6.608
 NEXT_PUBLIC_CPL_MODE=json   # json (Entwicklungsumgebung) oder jsSimulatedProd (CPL ->CGI-Interface-Simulator) oder production (CPL-> CGI-Interface Platzhalter)
 
diff --git a/.env.production b/.env.production
index a4b67a5..66e19d4 100644
--- a/.env.production
+++ b/.env.production
@@ -5,5 +5,5 @@ NEXT_PUBLIC_CPL_API_PATH=/CPL
 NEXT_PUBLIC_EXPORT_STATIC=true
 NEXT_PUBLIC_USE_CGI=true
 # App-Versionsnummer
-NEXT_PUBLIC_APP_VERSION=1.6.607
+NEXT_PUBLIC_APP_VERSION=1.6.608
 NEXT_PUBLIC_CPL_MODE=production
\ No newline at end of file
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 41fc4d1..6faf36b 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,12 @@
+## [1.6.608] – 2025-07-21
+
+- feat(analogInputsChart): zeige Minimum (i) und Maximum (a) als zusätzliche Linien im Chart
+
+- Chart zeigt jetzt Messwert (m), Minimum (i, grün) und Maximum (a, rot) für ausgewählten Zeitraum
+- Tooltip und Legende angepasst
+- Typdefinitionen für Chart
+
+---
 ## [1.6.607] – 2025-07-21
 
 - Nach Betriebsferien einmal sichern
diff --git a/components/main/analogInputs/AnalogInputsChart.tsx b/components/main/analogInputs/AnalogInputsChart.tsx
index d8a4c06..828aa0a 100644
--- a/components/main/analogInputs/AnalogInputsChart.tsx
+++ b/components/main/analogInputs/AnalogInputsChart.tsx
@@ -59,7 +59,7 @@ export default function AnalogInputsChart() {
   }, []);
 
   const dispatch = useDispatch<AppDispatch>();
-  const chartRef = useRef<ChartJS | null>(null);
+  const chartRef = useRef<any>(null);
 
   const { zeitraum, vonDatum, bisDatum, data, autoLoad, selectedId } =
     useSelector((state: RootState) => state.analogInputsHistory);
@@ -83,10 +83,13 @@ export default function AnalogInputsChart() {
       })
     );
 
-    if (chartRef.current) {
+    if (
+      chartRef.current &&
+      chartRef.current.options &&
+      chartRef.current.options.scales &&
+      chartRef.current.options.scales.x
+    ) {
       const chart = chartRef.current;
-
-      // Aktualisiere die X-Achse basierend auf den neuesten Werten
       chart.options.scales.x.min = new Date(latestVonDatum).getTime();
       chart.options.scales.x.max = new Date(latestBisDatum).getTime();
 
@@ -107,7 +110,10 @@ export default function AnalogInputsChart() {
           label: selectedAnalogInput?.label
             ? `Messwerteingang ${selectedAnalogInput.label}`
             : "Messwerte",
-          data: filteredData.map((point) => ({ x: point.t, y: point.m })),
+          data: filteredData.map((point) => ({
+            x: new Date(point.t),
+            y: point.m,
+          })),
           fill: false,
           borderColor: getColor("littwin-blue"),
           backgroundColor: "rgba(59,130,246,0.3)",
@@ -117,7 +123,6 @@ export default function AnalogInputsChart() {
         },
       ];
 
-      // Erzwinge ein vollständiges Redraw des Diagramms
       chart.update("none");
     }
   };
@@ -177,7 +182,10 @@ export default function AnalogInputsChart() {
               label: selectedAnalogInput?.label
                 ? `Messwert (m) ${selectedAnalogInput.label}`
                 : "Messwert (m)",
-              data: filteredData.map((point) => ({ x: point.t, y: point.m })),
+              data: filteredData.map((point) => ({
+                x: new Date(point.t),
+                y: point.m,
+              })),
               fill: false,
               borderColor: getColor("littwin-blue"),
               backgroundColor: "rgba(59,130,246,0.3)",
@@ -189,7 +197,7 @@ export default function AnalogInputsChart() {
               label: "Minimum (i)",
               data: filteredData
                 .filter((point) => typeof point.i === "number")
-                .map((point) => ({ x: point.t, y: point.i })),
+                .map((point) => ({ x: new Date(point.t), y: point.i })),
               fill: false,
               borderColor: "#22c55e", // grün
               borderWidth: 1,
@@ -201,7 +209,7 @@ export default function AnalogInputsChart() {
               label: "Maximum (a)",
               data: filteredData
                 .filter((point) => typeof point.a === "number")
-                .map((point) => ({ x: point.t, y: point.a })),
+                .map((point) => ({ x: new Date(point.t), y: point.a })),
               fill: false,
               borderColor: "#ef4444", // rot
               borderWidth: 1,
diff --git a/package-lock.json b/package-lock.json
index 186cb9f..9f58d1c 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,12 +1,12 @@
 {
   "name": "cpl-v4",
-  "version": "1.6.607",
+  "version": "1.6.608",
   "lockfileVersion": 3,
   "requires": true,
   "packages": {
     "": {
       "name": "cpl-v4",
-      "version": "1.6.607",
+      "version": "1.6.608",
       "dependencies": {
         "@fontsource/roboto": "^5.1.0",
         "@headlessui/react": "^2.2.4",
diff --git a/package.json b/package.json
index 4fd480b..7c3f73b 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "cpl-v4",
-  "version": "1.6.607",
+  "version": "1.6.608",
   "private": true,
   "scripts": {
     "dev": "next dev",