diff --git a/scripts/checkPulseData.py b/scripts/checkPulseData.py
index 8033762..dec459c 100644
--- a/scripts/checkPulseData.py
+++ b/scripts/checkPulseData.py
@@ -211,13 +211,13 @@
     # Select the instances where pulse data are monotonic
     monotonics = data_frame[data_frame['MPVs'].apply(is_monotonic)]
 
-    if not os.path.isfile('monotonics.pkl'):
+    if not os.path.isfile('monotonics_{DET}.pkl'.format(DET=detector)):
         import pickle
-        pickle.dump(monotonics, open('monotonics.pkl', 'wb'))
+        pickle.dump(monotonics, open('monotonics_{DET}.pkl'.format(DET=detector), 'wb'))
 
-    if not os.path.isfile('all_data.pkl'):
+    if not os.path.isfile('all_data_{DET}.pkl'.format(DET=detector)):
         import pickle
-        pickle.dump(data_frame, open('all_data.pkl', 'wb'))
+        pickle.dump(data_frame, open('all_data_{DET}.pkl'.format(DET=detector), 'wb'))
 
     # Combine masks with the '&' operator
     # (intersection in numpy), e.g.: