diff --git a/static/js/sensor-2.js b/static/js/sensor-2.js
index 3465126..1a8d931 100644
--- a/static/js/sensor-2.js
+++ b/static/js/sensor-2.js
@@ -100,7 +100,7 @@ document.addEventListener('DOMContentLoaded', function () {
             .then(response => response.json())
             .then(data => {
                 // 如果已有200个数据则移除最旧的一条
-                if (timestamps.length >= 200) {
+                if (timestamps.length >= 50) {
                     timestamps.shift();
                     humidities.shift();
                 }
diff --git a/static/js/sensor-3.js b/static/js/sensor-3.js
index 9635884..b32472c 100644
--- a/static/js/sensor-3.js
+++ b/static/js/sensor-3.js
@@ -101,7 +101,7 @@ document.addEventListener('DOMContentLoaded', function () {
             .then(response => response.json())
             .then(data => {
                 // 如果已有200个数据则移除最旧的一条
-                if (timestamps.length >= 200) {
+                if (timestamps.length >= 50) {
                     timestamps.shift();
                     co2.shift();
                 }
diff --git a/static/js/sensor-4.js b/static/js/sensor-4.js
index 30ffab2..91e0a8e 100644
--- a/static/js/sensor-4.js
+++ b/static/js/sensor-4.js
@@ -101,7 +101,7 @@ document.addEventListener('DOMContentLoaded', function () {
             .then(response => response.json())
             .then(data => {
                 // 如果已有200个数据则移除最旧的一条
-                if (timestamps.length >= 200) {
+                if (timestamps.length >= 50) {
                     timestamps.shift();
                     pressure.shift();
                 }