# CGM Sensor - Time to replace? **URL:** https://forum.fudiabetes.org/t/cgm-sensor-time-to-replace/2271 **Category:** Tips, Tech & Gear **Tags:** cgm, dexcom **Created:** [October 5, 2017, 11:15pm UTC](https://forum.fudiabetes.org/t/cgm-sensor-time-to-replace/2271 "2017-10-05T23:15:20Z") **Posts on this page:** 7 **Page:** 1
### Author: ![Thomas](https://yyz2.discourse-cdn.com/flex030/user_avatar/forum.fudiabetes.org/thomas/32/1719_2.png) [@Thomas](https://forum.fudiabetes.org/u/Thomas) #### Post date: [October 5, 2017, 11:15pm UTC](https://forum.fudiabetes.org/t/cgm-sensor-time-to-replace/2271/1 "2017-10-05T23:15:21Z")
How to know when your sensor needs to be replaced. ![0781084E82B5000029200003-attachment-1-IMG_1827](https://canada1.discourse-cdn.com/flex030/uploads/fudiabetes/original/2X/2/2e4e3585ee9e43817193c3921b170812d1deefcc.png) ---
### Author: ![docslotnick](https://yyz2.discourse-cdn.com/flex030/user_avatar/forum.fudiabetes.org/docslotnick/32/75_2.png) [@docslotnick](https://forum.fudiabetes.org/u/docslotnick) #### Post date: [October 5, 2017, 11:53pm UTC](https://forum.fudiabetes.org/t/cgm-sensor-time-to-replace/2271/2 "2017-10-05T23:53:24Z")
Either that or your infusion set. 😊 ---
### Author: ![Michel](https://yyz2.discourse-cdn.com/flex030/user_avatar/forum.fudiabetes.org/michel/32/387_2.png) [@Michel](https://forum.fudiabetes.org/u/Michel) #### Post date: [October 6, 2017, 12:11am UTC](https://forum.fudiabetes.org/t/cgm-sensor-time-to-replace/2271/3 "2017-10-06T00:11:31Z")
> [@docslotnick](#): > > Either that or your infusion set. 😊 Not at that speed of climb 🙂 ---
### Author: ![Thomas](https://yyz2.discourse-cdn.com/flex030/user_avatar/forum.fudiabetes.org/thomas/32/1719_2.png) [@Thomas](https://forum.fudiabetes.org/u/Thomas) #### Post date: [October 6, 2017, 12:39am UTC](https://forum.fudiabetes.org/t/cgm-sensor-time-to-replace/2271/4 "2017-10-06T00:39:49Z")
One more for fun. This was Day 11 or 12 on this sensor. So about typical for us. ![image](https://canada1.discourse-cdn.com/flex030/uploads/fudiabetes/original/2X/9/9c79d16983ce3cd8f493ef7815cda43a7cf5b9f0.jpg) New sensor and waiting on the two hours now. I have read about “hot sensor swap” process that some people do so as to avoid the 2-hr blackout but we always do a STOP / START on the sensor and put up with the 2 hour wait. Without knowing how the internals of the calibration algorithm work, I specifically don’t want any calibration from the previous sensor to carry over to this sensor. ---
### Author: ![docslotnick](https://yyz2.discourse-cdn.com/flex030/user_avatar/forum.fudiabetes.org/docslotnick/32/75_2.png) [@docslotnick](https://forum.fudiabetes.org/u/docslotnick) #### Post date: [October 6, 2017, 1:43am UTC](https://forum.fudiabetes.org/t/cgm-sensor-time-to-replace/2271/5 "2017-10-06T01:43:33Z")
> [@Michel](#): > > Not at that speed of climb Not even with a bolus free great banana split challenge? ---
### Author: ![Michel](https://yyz2.discourse-cdn.com/flex030/user_avatar/forum.fudiabetes.org/michel/32/387_2.png) [@Michel](https://forum.fudiabetes.org/u/Michel) #### Post date: [October 6, 2017, 2:25am UTC](https://forum.fudiabetes.org/t/cgm-sensor-time-to-replace/2271/6 "2017-10-06T02:25:47Z")
> [@docslotnick](#): > > Not even with a bolus free great banana split challenge? You got me there 🙂 ---
### Author: ![Thomas](https://yyz2.discourse-cdn.com/flex030/user_avatar/forum.fudiabetes.org/thomas/32/1719_2.png) [@Thomas](https://forum.fudiabetes.org/u/Thomas) #### Post date: [October 6, 2017, 2:28am UTC](https://forum.fudiabetes.org/t/cgm-sensor-time-to-replace/2271/7 "2017-10-06T02:28:54Z")
> [@docslotnick](#): > > Not even with a bolus free great banana split challenge? Yeah - that might be getting just a bit too crazy for us. lol The state we would end up in and the insulin we have access to would not work out well. It would be bad… 'Course if somebody was crazy enough to have IV insulin then maybe this could be tested.