diff --git a/sensor_base.hpp b/sensor_base.hpp
new file mode 100644
index 0000000..92f53a7
--- /dev/null
+++ b/sensor_base.hpp
@@ -0,0 +1,30 @@
+#pragma once
+
+
+namespace phosphor
+{
+namespace fan
+{
+namespace presence
+{
+
+class FanEnclosure;
+class Sensor
+{
+    public:
+        Sensor() = delete;
+        Sensor(const Sensor&) = delete;
+        Sensor(Sensor&&) = delete;
+        Sensor& operator=(const Sensor&) = delete;
+        Sensor& operator=(Sensor&&) = delete;
+        virtual ~Sensor() = default;
+
+        virtual bool isPresent() = 0;
+
+    protected:
+
+};
+
+} // namespace presence
+} // namespace fan
+} // namespace phosphor