Wireless Sensor Networks (WSNs) are envisioned to enable a variety of applications including environmental monitoring, building and plant automation, homeland security and healthcare. It has been argued that one of the key characteristics of sensor networks is that they are so tightly coupled with the applications running on top of them. Although WSNs have been an active area of research for over a decade, real world sensor network deployments have not yet found their way to widespread adoption. The experience gained and lessons learned during the initial attempts to deploy WSNs and implement various sensor network applications are very valuable for the advancement of this technology.The 1st International Conference on Sensor Networks Applications, Experimentation and Logistics (SENSAPPEAL 2009) aims at bringing together researchers and developers from academia and industry to present their work and share their experiences with developing, deploying and testing WSN applications. Moreover key enablers to WSN application development (such as OS, middleware, in-field reprogramming, testbeds and simulators, etc.) fall within the scope of the conference.