diff --git a/src/pages/Transducer.vue b/src/pages/Transducer.vue
index dfca317..6e13d09 100644
--- a/src/pages/Transducer.vue
+++ b/src/pages/Transducer.vue
@@ -151,7 +151,8 @@ export default {
           r: Math.round(res.data[0].total_reactive_power),
           t: Math.round(res.data[0].total_power_factor)
         }
-        this.lastReading = this.getTime(res.data.collection_time)
+
+        this.lastReading = this.getTime(res.data[0].collection_date)
         this.hasMeasurements = true
       })
       .catch(err => {
@@ -211,7 +212,7 @@ export default {
     },
     getTime (d) {
       let ans = timePassed(d)
-      if (ans !== 'agora') {
+      if (ans !== 'agora' && ans !== 'indeterminado') {
         ans = 'há ' + ans
       }
       return ans
diff --git a/src/utils/timePassed.js b/src/utils/timePassed.js
index 71e6169..1736409 100644
--- a/src/utils/timePassed.js
+++ b/src/utils/timePassed.js
@@ -14,7 +14,9 @@ export default function timePassed (time) {
         return h + 'h ' + m + 'min'
       }
     }
-  } else {
+  } else if (time !== undefined && time !== null) {
     return 'agora'
+  } else {
+    return 'indeterminado'
   }
 }