diff --git a/src/helper/childRegistrationUtils.js b/src/helper/childRegistrationUtils.js
index 8db49d8..eac2e7d 100644
--- a/src/helper/childRegistrationUtils.js
+++ b/src/helper/childRegistrationUtils.js
@@ -85,12 +85,12 @@ class ChildRegistrationUtils {
 
       case "actuator":
         this.logger.debug(`Registering linear actuator child: ${id}`);
-        this.connectActuator(child,positionVsParent);
+        this.connectActuator(child, positionVsParent);
         break;
       
       case "reactor":
         this.logger.debug(`Registering reactor child: ${id}`);
-        this.connectReactor(child);
+        this.connectReactor(child, positionVsParent);
         break;
 
       default:
@@ -228,18 +228,30 @@ class ChildRegistrationUtils {
   
   //wanneer hij deze ontvangt is deltaP van een van de valves veranderd (kan ook zijn niet child zijn, maar dat maakt niet uit)
 
-  connectReactor(reactor) {
+  connectReactor(reactor, positionVsParent) {
     if (!reactor) {
       this.logger.warn("Invalid reactor provided.");
       return;
     }
-    this.mainClass.upstreamReactor = reactor; // Add reactor to the main class
-    this.logger.info(`Reactor registered successfully.`);
+
+    if (this.mainClass?.upstreamReactor){
+      this.mainClass.upstreamReactor = reactor; // Add reactor to the main class
+      this.logger.info(`Upstream reactor registered successfully.`);
+    } else if (this.mainClass?.reactors) {
+      if (positionVsParent == "downstream") {
+        this.mainClass.reactors[0] = reactor;
+      }
+      if (positionVsParent == "upstream") {
+        this.mainClass.reactors[1] = reactor;
+      }
+      this.logger.info(`Reactor registered successfully: ${this.mainClass.reactors}`);
+    } else {
+      this.logger.error(`Reactor not registered!`)
+    }
 
     reactor.emitter.on("stateChange", (data) => {
-      this.mainClass.logger.debug(`State change of reactor detected: ${data}`);
-      this.mainClass.setInflux = data;
-      this.mainClass.updateState(data.timestamp);
+      this.mainClass.logger.debug(`State change of upstream reactor detected.`);
+      this.mainClass.updateState(data);
     });
   }