diff --git a/src/discrete_threshold.cpp b/src/discrete_threshold.cpp
new file mode 100644
index 0000000..a93f682
--- /dev/null
+++ b/src/discrete_threshold.cpp
@@ -0,0 +1,103 @@
+#include "discrete_threshold.hpp"
+
+#include <phosphor-logging/log.hpp>
+
+DiscreteThreshold::DiscreteThreshold(
+    boost::asio::io_context& ioc,
+    std::vector<std::shared_ptr<interfaces::Sensor>> sensorsIn,
+    std::vector<std::string> sensorNames,
+    std::vector<std::unique_ptr<interfaces::TriggerAction>> actionsIn,
+    std::chrono::milliseconds dwellTimeIn, double thresholdValueIn,
+    std::string name) :
+    ioc(ioc),
+    sensors(std::move(sensorsIn)), actions(std::move(actionsIn)),
+    dwellTime(dwellTimeIn), thresholdValue(thresholdValueIn), name(name)
+{
+    details.reserve(sensors.size());
+    for (size_t i = 0; i < sensors.size(); i++)
+    {
+        details.emplace_back(sensorNames[i], false, ioc);
+    }
+}
+
+void DiscreteThreshold::initialize()
+{
+    for (auto& sensor : sensors)
+    {
+        sensor->registerForUpdates(weak_from_this());
+    }
+}
+
+DiscreteThreshold::ThresholdDetail&
+    DiscreteThreshold::getDetails(interfaces::Sensor& sensor)
+{
+    auto it =
+        std::find_if(sensors.begin(), sensors.end(),
+                     [&sensor](const auto& x) { return &sensor == x.get(); });
+    auto index = std::distance(sensors.begin(), it);
+    return details.at(index);
+}
+
+void DiscreteThreshold::sensorUpdated(interfaces::Sensor& sensor,
+                                      uint64_t timestamp)
+{}
+
+void DiscreteThreshold::sensorUpdated(interfaces::Sensor& sensor,
+                                      uint64_t timestamp, double value)
+{
+    auto& [sensorName, dwell, timer] = getDetails(sensor);
+
+    if (thresholdValue)
+    {
+        if (dwell && value != thresholdValue)
+        {
+            timer.cancel();
+            dwell = false;
+        }
+        else if (value == thresholdValue)
+        {
+            startTimer(sensor, timestamp, value);
+        }
+    }
+}
+
+void DiscreteThreshold::startTimer(interfaces::Sensor& sensor,
+                                   uint64_t timestamp, double value)
+{
+    auto& [sensorName, dwell, timer] = getDetails(sensor);
+    if (dwellTime == std::chrono::milliseconds::zero())
+    {
+        commit(sensorName, timestamp, value);
+    }
+    else
+    {
+        dwell = true;
+        timer.expires_after(dwellTime);
+        timer.async_wait([this, &sensor, timestamp,
+                          value](const boost::system::error_code ec) {
+            if (ec)
+            {
+                phosphor::logging::log<phosphor::logging::level::DEBUG>(
+                    "Timer has been canceled");
+                return;
+            }
+            auto& [sensorName, dwell, timer] = getDetails(sensor);
+            commit(sensorName, timestamp, value);
+            dwell = false;
+        });
+    }
+}
+
+void DiscreteThreshold::commit(const std::string& sensorName,
+                               uint64_t timestamp, double value)
+{
+    for (const auto& action : actions)
+    {
+        action->commit(sensorName, timestamp, value);
+    }
+}
+
+const char* DiscreteThreshold::getName() const
+{
+    return name.c_str();
+}