diff --git a/bundles/org.openhab.binding.opensprinkler/src/main/java/org/openhab/binding/opensprinkler/internal/handler/OpenSprinklerStationHandler.java b/bundles/org.openhab.binding.opensprinkler/src/main/java/org/openhab/binding/opensprinkler/internal/handler/OpenSprinklerStationHandler.java
index f0b5718760e..2ce7230f17c 100644
--- a/bundles/org.openhab.binding.opensprinkler/src/main/java/org/openhab/binding/opensprinkler/internal/handler/OpenSprinklerStationHandler.java
+++ b/bundles/org.openhab.binding.opensprinkler/src/main/java/org/openhab/binding/opensprinkler/internal/handler/OpenSprinklerStationHandler.java
@@ -25,7 +25,6 @@ import org.openhab.binding.opensprinkler.internal.api.OpenSprinklerApi;
 import org.openhab.binding.opensprinkler.internal.api.exception.CommunicationApiException;
 import org.openhab.binding.opensprinkler.internal.api.exception.GeneralApiException;
 import org.openhab.binding.opensprinkler.internal.config.OpenSprinklerStationConfig;
-import org.openhab.core.library.types.DecimalType;
 import org.openhab.core.library.types.OnOffType;
 import org.openhab.core.library.types.QuantityType;
 import org.openhab.core.thing.Channel;
@@ -85,13 +84,14 @@ public class OpenSprinklerStationHandler extends OpenSprinklerBaseHandler {
         updateChannels();
     }
 
+    @SuppressWarnings("null")
     private void handleNextDurationCommand(ChannelUID channelUID, Command command) {
         if (!(command instanceof QuantityType<?>)) {
             logger.info("Ignoring implausible non-QuantityType command for NEXT_DURATION");
             return;
         }
         QuantityType<?> quantity = (QuantityType<?>) command;
-        this.nextDurationTime = quantity.toBigDecimal();
+        this.nextDurationTime = quantity.toUnit(Units.SECOND).toBigDecimal();
         updateState(channelUID, quantity);
     }
 
@@ -204,7 +204,7 @@ public class OpenSprinklerStationHandler extends OpenSprinklerBaseHandler {
             case NEXT_DURATION:
                 BigDecimal duration = nextDurationValue();
                 if (duration != null) {
-                    updateState(channel, new DecimalType(duration));
+                    updateState(channel, new QuantityType<>(duration, Units.SECOND));
                 }
                 break;
             case STATION_QUEUED:
diff --git a/bundles/org.openhab.binding.opensprinkler/src/main/resources/OH-INF/thing/thing-types.xml b/bundles/org.openhab.binding.opensprinkler/src/main/resources/OH-INF/thing/thing-types.xml
index 22afafaef1d..bea478715c3 100644
--- a/bundles/org.openhab.binding.opensprinkler/src/main/resources/OH-INF/thing/thing-types.xml
+++ b/bundles/org.openhab.binding.opensprinkler/src/main/resources/OH-INF/thing/thing-types.xml
@@ -120,6 +120,6 @@
 		<item-type>Number:Time</item-type>
 		<label>Next Open Duration</label>
 		<description>The duration the station will be opened the next time it is switched on.</description>
-		<state readOnly="false" pattern="%.0f s"/>
+		<state readOnly="false" pattern="%.0f min"/>
 	</channel-type>
 </thing:thing-descriptions>