diff --git a/wally/sensors/protocol.py b/wally/sensors/protocol.py
index 67aef2a..c053011 100644
--- a/wally/sensors/protocol.py
+++ b/wally/sensors/protocol.py
@@ -1,4 +1,5 @@
 import sys
+import csv
 import time
 import struct
 import socket
@@ -217,6 +218,28 @@
         self.fd = open(fname, "w")
 
 
+class CSVFileTransport(ITransport):
+    required_keys = set(['time', 'source_id', 'hostname'])
+
+    def __init__(self, receiver, fname):
+        ITransport.__init__(self, receiver)
+        self.fd = open(fname, "w")
+        self.csv_fd = csv.writer(self.fd)
+        self.field_list = []
+        self.csv_fd.writerow(['NEW_DATA'])
+
+    def send(self, data):
+        if self.field_list == []:
+            keys = set(data)
+            assert self.required_keys.issubset(keys)
+            keys -= self.required_keys
+            self.field_list = sorted(keys)
+            self.csv_fd.writerow([data['source_id'], data['hostname']] +
+                                 self.field_list)
+
+        self.csv_fd.writerow(map(data.__getitem__, ['time'] + self.field_list))
+
+
 class UDPTransport(ITransport):
     def __init__(self, receiver, ip, port, packer_cls):
         self.port = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
@@ -261,6 +284,8 @@
                             packer_cls=packer_cls)
     elif parsed_uri.scheme == 'file':
         return FileTransport(receiver, parsed_uri.path)
+    elif parsed_uri.scheme == 'csvfile':
+        return CSVFileTransport(receiver, parsed_uri.path)
     else:
         templ = "Can't instantiate transport from {0!r}"
         raise ValueError(templ.format(uri))