diff --git a/influx_hs110_energy.rb b/influx_hs110_energy.rb
index b176c4e..2dc1f74 100755
--- a/influx_hs110_energy.rb
+++ b/influx_hs110_energy.rb
@@ -96,7 +96,7 @@
       threads << Thread.new do
         debug_message("Creating processing thread for plug #{plug_name}.") if options[:verbose]
         begin
-          time_start = Process.clock_gettime(Process::CLOCK_MONOTONIC) if options[:debug]
+          time_start = Process.clock_gettime(Process::CLOCK_MONOTONIC)
           plug = TpLinkSmartplugInflux::Plug.new(name: plug_name, address: config['address'])
           %i(debug= verbose=).each { |opt| plug.send(opt, config[opt]) }
 
@@ -119,6 +119,7 @@
           measurement_string = ''
           measurement_string.concat("#{measurement},")
           measurement_string.concat(plug.influx_line)
+          measurement_string.concat(",polltime=#{milliseconds_since(time_start)}")
 
           measurement_strings.push(measurement_string)
 
diff --git a/lib/tp_link_smartplug_influx/helpers.rb b/lib/tp_link_smartplug_influx/helpers.rb
index 6e943aa..2dd8508 100644
--- a/lib/tp_link_smartplug_influx/helpers.rb
+++ b/lib/tp_link_smartplug_influx/helpers.rb
@@ -23,6 +23,13 @@ def seconds_since(time)
   (Process.clock_gettime(Process::CLOCK_MONOTONIC) - time).round(2)
 end
 
+# Get the number of milliseconds elapsed since the provided time.
+# @param time [Float] Previous time input.
+# @return [Integer] Milliseconds elapsed.
+def milliseconds_since(time)
+  ((Process.clock_gettime(Process::CLOCK_MONOTONIC) - time) * 1000).round
+end
+
 module TpLinkSmartplugInflux
   # Module containing helper methods to be included within the base class.
   #