APT AC power sources are used throughout the world in a variety of small and large scale applications. Whether you plan to use one of our instruments in the lab or in the field, we understand that your need is immediate and your application is critical. This is why we are the only AC power source manufacturer to offer guaranteed delivery. While many of our competitors require lead times of up to 8-weeks, we will ship any standard instrument within 24-hours of purchase, or we pay the freight. This guarantee covers all our standard models, not just a few selective ones. When you choose APT, you are choosing a partner that understands your needs and makes it our only goal to satisfy them.