diff --git a/lib/imc_channel.hpp b/lib/imc_channel.hpp
index fe667ea..90f27a0 100644
--- a/lib/imc_channel.hpp
+++ b/lib/imc_channel.hpp
@@ -381,7 +381,7 @@ namespace imc
     }
 
     // print channel
-    void print(std::string filename, const char sep = ' ', int width = 25)
+    void print(std::string filename, const char sep = ',', int width = 25)
     {
       std::ofstream fou(filename);
 
diff --git a/lib/imc_raw.hpp b/lib/imc_raw.hpp
index 8e6b0cd..54092c8 100644
--- a/lib/imc_raw.hpp
+++ b/lib/imc_raw.hpp
@@ -333,7 +333,7 @@ namespace imc
     }
 
     // print all channels in directory
-    void print_channels(std::string output)
+    void print_channels(std::string output, const char sep)
     {
       // check for given directory
       std::filesystem::path pd = output;
@@ -352,7 +352,7 @@ namespace imc
         std::filesystem::path pf = pd / filenam;
 
         // and print the channel
-        it->second.print(pf);
+        it->second.print(pf,sep);
       }
     }
 
diff --git a/makefile b/makefile
index 983a850..558b170 100644
--- a/makefile
+++ b/makefile
@@ -93,7 +93,7 @@ cython-install : check-vtag $(CTAG) $(CYT)setup.py $(CYT)imc_termite.pxd $(CYT)p
 cython-clean :
 	rm -vf imc_termite.cpython-*.so
 	rm -vf $(PYT)imc_termite.cpython-*.so
-	rm -rv build/
+	rm -rvf build/
 
 #-----------------------------------------------------------------------------#
 # pip
diff --git a/src/main.cpp b/src/main.cpp
index 9148d1c..69dc3ef 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -66,6 +66,20 @@ optkeys parse_args(int argc, char* argv[], bool list_args = false)
         i = i + 1;
       }
     }
+    else if ( std::string(argv[i]) == std::string("--delimiter")
+           || std::string(argv[i]) == std::string("-s") )
+    {
+      if ( i+1 == argc || argv[i+1][0] == '-' )
+      {
+        std::cerr<<"invalid or missing --output argument\n";
+        prsdkeys.insert(std::pair<std::string,std::string>("invalid","delimiter"));
+      }
+      else
+      {
+        prsdkeys.insert(std::pair<std::string,std::string>("delimiter",argv[i+1]));
+        i = i + 1;
+      }
+    }
     else if ( std::string(argv[i]) == std::string("--help")
            || std::string(argv[i]) == std::string("-h") )
     {
@@ -121,9 +135,13 @@ void show_usage()
            <<" -c, --listchannels      list channels\n"
            <<" -b, --listblocks        list IMC key-blocks\n"
            <<" -d, --output            output directory to print channels\n"
+           <<" -s, --delimiter         csv delimiter/separator char for output\n"
            <<" -h, --help              show this help message \n"
            <<" -v, --version           display version\n"
-           <<"\n";
+           <<"\n"
+           <<"Example:"
+           <<" $ ./imctermite sample/data_A.raw -c -b -d ./data -s ','"
+           <<"\n\n";
 }
 
 //---------------------------------------------------------------------------//
@@ -209,7 +227,11 @@ int main(int argc, char* argv[])
     if ( cfgopts.count("output") == 1 )
     {
       try {
-        imcraw.print_channels(cfgopts.at("output"));
+        if ( cfgopts.at("delimiter").size() > 1 )
+        {
+          throw std::runtime_error("invalid delimiter comprised of more than a single char");
+        }
+        imcraw.print_channels(cfgopts.at("output"),cfgopts.at("delimiter")[0]);
       } catch (const std::exception& e) {
         std::cerr<<"failed to print channels for "<<rawfile<<": "<<e.what()<<"\n";
       }