diff --git a/src/g5505_file_reader.py b/src/g5505_file_reader.py
index c86a2ee..97abb1a 100644
--- a/src/g5505_file_reader.py
+++ b/src/g5505_file_reader.py
@@ -77,6 +77,7 @@ def read_txt_files_as_dict(filename : str ):
 
 
     #TODO: this may be prone to error if assumed folder structure is non compliant 
+    file_encoding = 'utf-8'
     if 'RGA' in filename: #TODO: it does not work with separator as none :(. fix for RGA
         #end_of_header = 'Channel,  Mass(amu),     Name,                 Cal Factor,  Noise Floor, CEM Status',
         table_header = 'Time(s)      Channel#1   Channel#2   Channel#3   Channel#4   Channel#5   Channel#6   Channel#7   Channel#8'
@@ -89,9 +90,10 @@ def read_txt_files_as_dict(filename : str ):
     elif 'Humidity_Sensors' in filename:
         table_header = 'Date	Time	RH1[%]	RH2[%]	RH3[%]	RH4[%]	RH5[%]	RH6[%]	RH7[%]	RH8[%]	T1[°C]	T2[°C]	T3[°C]	T4[°C]	T5[°C]	T6[°C]	T7[°C]	T8[°C]	DP1[°C]	DP2[°C]	DP3[°C]	DP4[°C]	DP5[°C]	DP6[°C]	DP7[°C]	DP8[°C]'
         separator = '\t'
+        file_encoding = 'latin-1'
     elif 'ICAD' in filename and 'HONO' in filename:
         table_header = 'Start Date/Time (UTC)	Duration (s)	NO2 (ppb)	NO2 Uncertainty (ppb)	H2O (ppb)	H2O Uncertainty (ppb)	CHOCHO (ppb)	CHOCHO Uncertainty (ppb)	File Number	Light Intensity	#ICEDOAS iter.	Cell Pressure	Ambient Pressure	Cell Temp	Spec Temp	Lat	Lon	Height	Speed	GPSQuality	0-Air Ref. Time	0-Air Ref. Duration	0-Air Ref. File Number	0-Air Ref. Intensity	0-Air Ref. Rel Intensity	0-Air Ref. Intensity valid	MeasMode	SampleSource'
-        separator = '\t'
+        separator = '\t'        
     elif 'ICAD' in filename and 'NO2' in filename:
         table_header = 'Start Date/Time (UTC)	Duration (s)	NO2 (ppb)	NO2 Uncertainty (ppb)	H2O (ppb)	H2O Uncertainty (ppb)	CHOCHO (ppb)	CHOCHO Uncertainty (ppb)	File Number	Light Intensity	#ICEDOAS iter.	Cell Pressure	Ambient Pressure	Cell Temp	Spec Temp	Lat	Lon	Height	Speed	GPSQuality	0-Air Ref. Time	0-Air Ref. Duration	0-Air Ref. File Number	0-Air Ref. Intensity	0-Air Ref. Rel Intensity	0-Air Ref. Intensity valid	MeasMode	SampleSource'
         separator = '\t'
@@ -105,13 +107,12 @@ def read_txt_files_as_dict(filename : str ):
     # Work with copy of the file for safety
     tmp_filename = utils.make_file_copy(source_file_path=filename)
 
-    with open(tmp_filename,'r') as f:
-        file_encoding = f.encoding
+    with open(tmp_filename,'r',encoding=file_encoding,errors='ignore') as f:
+        #file_encoding = f.encoding
         #table_preamble = ""
         table_preamble = []
         for line_number, line in enumerate(f):        
             
-            table_preamble += line
             if table_header in line:   
                 list_of_substrings = line.split(separator)             
                 data_start = True