diff --git a/.gitignore b/.gitignore
index b67fac6..f7a4a8c 100644
--- a/.gitignore
+++ b/.gitignore
@@ -4,6 +4,7 @@
 *.kicad_sch-bak
 *.kicad_pcb-bak
 *.sch-bak
+*-backups
 *~
 _autosave-*
 *.tmp
diff --git a/Flow_Controller-backups/Flow_Controller-2026-05-13_160634.zip b/Flow_Controller-backups/Flow_Controller-2026-05-13_160634.zip
deleted file mode 100644
index a1d8d97..0000000
Binary files a/Flow_Controller-backups/Flow_Controller-2026-05-13_160634.zip and /dev/null differ
diff --git a/Flow_Controller-backups/Flow_Controller-2026-05-13_161233.zip b/Flow_Controller-backups/Flow_Controller-2026-05-13_161233.zip
deleted file mode 100644
index 33539d1..0000000
Binary files a/Flow_Controller-backups/Flow_Controller-2026-05-13_161233.zip and /dev/null differ
diff --git a/Flow_Controller-backups/Flow_Controller-2026-05-13_161917.zip b/Flow_Controller-backups/Flow_Controller-2026-05-13_161917.zip
deleted file mode 100644
index e4e5b9a..0000000
Binary files a/Flow_Controller-backups/Flow_Controller-2026-05-13_161917.zip and /dev/null differ
diff --git a/Flow_Controller-backups/Flow_Controller-2026-05-13_162611.zip b/Flow_Controller-backups/Flow_Controller-2026-05-13_162611.zip
deleted file mode 100644
index 19b8bef..0000000
Binary files a/Flow_Controller-backups/Flow_Controller-2026-05-13_162611.zip and /dev/null differ
diff --git a/Flow_Controller-backups/Flow_Controller-2026-05-13_163406.zip b/Flow_Controller-backups/Flow_Controller-2026-05-13_163406.zip
deleted file mode 100644
index 3de44f3..0000000
Binary files a/Flow_Controller-backups/Flow_Controller-2026-05-13_163406.zip and /dev/null differ
diff --git a/Flow_Controller-backups/Flow_Controller-2026-05-14_132908.zip b/Flow_Controller-backups/Flow_Controller-2026-05-14_132908.zip
deleted file mode 100644
index ab0def3..0000000
Binary files a/Flow_Controller-backups/Flow_Controller-2026-05-14_132908.zip and /dev/null differ
diff --git a/Flow_Controller-backups/Flow_Controller-2026-05-14_141332.zip b/Flow_Controller-backups/Flow_Controller-2026-05-14_141332.zip
deleted file mode 100644
index 060e030..0000000
Binary files a/Flow_Controller-backups/Flow_Controller-2026-05-14_141332.zip and /dev/null differ
diff --git a/Flow_Controller-backups/Flow_Controller-2026-05-14_141943.zip b/Flow_Controller-backups/Flow_Controller-2026-05-14_141943.zip
deleted file mode 100644
index 8e0d180..0000000
Binary files a/Flow_Controller-backups/Flow_Controller-2026-05-14_141943.zip and /dev/null differ
diff --git a/Flow_Controller-backups/Flow_Controller-2026-05-14_171830.zip b/Flow_Controller-backups/Flow_Controller-2026-05-14_171830.zip
deleted file mode 100644
index d6c743e..0000000
Binary files a/Flow_Controller-backups/Flow_Controller-2026-05-14_171830.zip and /dev/null differ
diff --git a/Flow_Controller-backups/Flow_Controller-2026-05-14_221748.zip b/Flow_Controller-backups/Flow_Controller-2026-05-14_221748.zip
deleted file mode 100644
index 327082d..0000000
Binary files a/Flow_Controller-backups/Flow_Controller-2026-05-14_221748.zip and /dev/null differ
diff --git a/Readme.md b/Readme.md
index caf2e2d..cf85837 100644
--- a/Readme.md
+++ b/Readme.md
@@ -7,6 +7,8 @@ A fail-safe water flow monitoring module designed to protect CNC spindles and la
 ![Front](images/Flow_Controller_front.png)
 ![Back](images/Flow_Controller_back.png)
 
+![ZJ-S401](images/Sensor_ZJ-S401.png)
+
 Designed in **KiCad v9**.
 
 ## Features
diff --git a/images/Sensor_ZJ-S401.png b/images/Sensor_ZJ-S401.png
new file mode 100644
index 0000000..1ce250c
Binary files /dev/null and b/images/Sensor_ZJ-S401.png differ