I think its just best to leave it in the enlosure as is. Using any adhesive like velcro to secure it could cause a problem to your snake's skin if it were to get stuck on it. More often than not they are going to knock it over every night strolling around. You're going to want to keep the actual unit on the substrate so that you can pick up the ground level temps. Placing the probe on the warm side either under the substrate or in the snakes hide depending how you want to monitor your temps.