diff --git a/include/TachSensor.hpp b/include/TachSensor.hpp
index c9aa80a..174ce56 100644
--- a/include/TachSensor.hpp
+++ b/include/TachSensor.hpp
@@ -52,7 +52,8 @@
                const std::shared_ptr<RedundancySensor> &redundancy,
                boost::asio::io_service &io, const std::string &fanName,
                std::vector<thresholds::Threshold> &&thresholds,
-               const std::string &sensorConfiguration);
+               const std::string &sensorConfiguration,
+               const std::pair<size_t, size_t> &limits);
     ~TachSensor();
 
   private:
diff --git a/include/Utils.hpp b/include/Utils.hpp
index fd4dde2..b86c8b5 100644
--- a/include/Utils.hpp
+++ b/include/Utils.hpp
@@ -1,4 +1,6 @@
 #pragma once
+#include "VariantVisitors.hpp"
+
 #include <boost/container/flat_map.hpp>
 #include <experimental/filesystem>
 #include <iostream>
@@ -24,6 +26,10 @@
 using SensorData = boost::container::flat_map<
     std::string, boost::container::flat_map<std::string, BasicVariantType>>;
 
+using SensorBaseConfiguration =
+    std::pair<std::string,
+              boost::container::flat_map<std::string, BasicVariantType>>;
+
 bool findFiles(const std::experimental::filesystem::path dirPath,
                const std::string& matchString,
                std::vector<std::experimental::filesystem::path>& foundPaths,
@@ -32,4 +38,8 @@
 bool getSensorConfiguration(
     const std::string& type,
     const std::shared_ptr<sdbusplus::asio::connection>& dbusConnection,
-    ManagedObjectType& resp, bool useCache = false);
\ No newline at end of file
+    ManagedObjectType& resp, bool useCache = false);
+
+// replaces limits if MinReading and MaxReading are found.
+void findLimits(std::pair<double, double>& limits,
+                const SensorBaseConfiguration* data);
\ No newline at end of file