diff --git a/daqviewer/daqviewer.py b/daqviewer/daqviewer.py
index 5fd9dc7..a2b4b70 100644
--- a/daqviewer/daqviewer.py
+++ b/daqviewer/daqviewer.py
@@ -50,6 +50,7 @@ def parse_contents(contents, filename):
 
     # Check instrument type
     inst_type = basename.split('_')[-1]
+    units = pd.read_csv(io.StringIO(decoded.decode('utf-8'))).columns[1]
     if inst_type == 'WP':
         df = pd.read_csv(io.StringIO(decoded.decode('utf-8')),
                          index_col=0,
@@ -103,7 +104,7 @@ def parse_contents(contents, filename):
         # Add spectral values to dataframe
         stats.loc[col, keys] = values
 
-    info = {'filename': filename, 'instrument type': inst_type}
+    info = {'filename': filename, 'instrument type': inst_type, 'units': units}
     json_data = {}
     json_data['info'] = info
     json_data['timeseries'] = df.to_json(orient='table')