diff --git a/include/IpmbSDRSensor.hpp b/include/IpmbSDRSensor.hpp
new file mode 100644
index 0000000..4284e7a
--- /dev/null
+++ b/include/IpmbSDRSensor.hpp
@@ -0,0 +1,118 @@
+#pragma once
+
+#include <sensor.hpp>
+
+using IpmbMethodType =
+    std::tuple<int, uint8_t, uint8_t, uint8_t, uint8_t, std::vector<uint8_t>>;
+
+enum class SDRType
+{
+    sdrType01 = 1,
+    sdrType02 = 2,
+    sdrType03 = 3
+};
+
+namespace sdr
+{
+// IPMB Commands
+static constexpr uint8_t netfnStorageReq = 0x0a;
+static constexpr uint8_t cmdStorageGetSdrInfo = 0x20;
+static constexpr uint8_t cmdStorageReserveSdr = 0x22;
+static constexpr uint8_t cmdStorageGetSdr = 0x23;
+
+// Get SDR Commands
+static constexpr uint8_t sdrNxtRecLSB = 0;
+static constexpr uint8_t sdrNxtRecMSB = 1;
+static constexpr uint8_t perCountByte = 16;
+
+// Sensor Record Bytes
+static constexpr uint8_t sdrType = 5;
+static constexpr uint8_t dataLengthByte = 6;
+static constexpr uint8_t sdrSensorNum = 9;
+
+} // namespace sdr
+
+namespace sdrtype01
+{
+// Negative Handle Commands
+static constexpr uint8_t maxPosReadingMargin = 127;
+static constexpr uint8_t twosCompVal = 128;
+static constexpr double thermalConst = 256;
+
+static constexpr uint8_t sdrSensNoThres = 0;
+static constexpr uint8_t sensorCapability = 13;
+static constexpr uint8_t sdrNegHandle = 24;
+static constexpr uint8_t sdrUnitType = 25;
+static constexpr uint8_t sdrLinearByte = 27;
+
+// SDR Type 1 Thresholds Commands
+static constexpr uint8_t mDataByte = 28;
+static constexpr uint8_t mTolDataByte = 29;
+static constexpr uint8_t bDataByte = 30;
+static constexpr uint8_t bAcuDataByte = 31;
+static constexpr uint8_t rbExpDataByte = 33;
+static constexpr uint8_t upperCriticalThreshold = 43;
+static constexpr uint8_t lowerCriticalThreshold = 46;
+static constexpr uint8_t nameLengthByte = 53;
+
+} // namespace sdrtype01
+
+struct SensorInfo
+{
+    std::string sensorReadName;
+    uint8_t sensorUnit = 0;
+    double thresUpperCri = 0;
+    double thresLowerCri = 0;
+    uint8_t sensorNumber = 0;
+    uint8_t sensCap = 0;
+};
+
+struct SensorValConversion
+{
+    uint16_t mValue = 0;
+    double bValue = 0;
+    double expoVal = 0;
+    uint8_t negRead = 0;
+};
+
+inline std::map<int, std::vector<SensorInfo>> sensorRecord;
+inline std::map<int, std::map<uint8_t, SensorValConversion>> sensorValRecord;
+
+class IpmbSDRDevice : public std::enable_shared_from_this<IpmbSDRDevice>
+{
+  public:
+    IpmbSDRDevice(std::shared_ptr<sdbusplus::asio::connection>& dbusConnection,
+                  uint8_t cmdAddr);
+
+    uint8_t commandAddress = 0;
+    int hostIndex = 0;
+
+    std::shared_ptr<sdbusplus::asio::connection> conn;
+
+    std::vector<uint8_t> sdrData;
+    uint16_t validRecordCount = 1;
+    uint8_t iCnt = 0;
+    uint8_t nextRecordIDLSB = 0;
+    uint8_t nextRecordIDMSB = 0;
+
+    std::vector<uint8_t> sdrCommandData = {};
+
+    void getSDRRepositoryInfo();
+
+    void reserveSDRRepository(uint16_t recordCount);
+
+    void getSDRSensorData(uint16_t recordCount, uint8_t resrvIDLSB,
+                          uint8_t resrvIDMSB);
+
+    void handleSDRData(const std::vector<uint8_t>& data, uint16_t recordCount,
+                       uint8_t resrvIDLSB, uint8_t resrvIDMSB);
+
+    void checkSDRData(std::vector<uint8_t>& sdrDataBytes,
+                      uint8_t dataLength) const;
+
+    static void checkSDRType01Threshold(std::vector<uint8_t>& sdrDataBytes,
+                                        int busIndex, std::string tempName);
+
+    inline static double sensorValCalculation(uint16_t mValue, double bValue,
+                                              double expValue, double value);
+};