The magnetic sensing systems as used by the Solo doggy doors are short-range, inaccurate and highly sensitive to electric appliances. They may suddenly start opening and closing in response to your dishwasher or washing machine. Power Pet electronic pet doors use a patented directional ultrasonic sensing system that responds to one thing only, the tiny, water-resistant collar. Another key concern is that the Solo automatic pet door is not UL approved for safe electrical manufacture. We would never recommend putting an electrical appliance in your home that is not UL approved.
Pet Door Collar Tags | Magnetic | RFID ..
The basic, manual, dog door is mounted in a door or wall, and has a flap for dog entry and exit. This type of door is the most affordable; however, the owner cannot control when the dog can come and go. There is also no regulation over which pets can use the door. For example, if a cat or another dog is not allowed outside unsupervised, this type of door does nothing to prevent their access.
An automatic door, on the other hand, can be dog specific, as the door opening is activated by a control on the animal’s collar. With electronic doors, the contains a computer chip, ultrasound transmitter, or special magnet that signals the door to unlock. An added advantage is the automatic door’s ability to keep unwanted pests, and even intruders, from gaining access.
Electronic Dog Doors Not all Created Equal - High Tech Pet
In addition to many other patented features, the Power Pet door employs a patented automatic dead bolt lock. When the panel is in the closed position, a steel dead bolt automatically engages to lock it in place. The panel absolutely cannot be lifted without a signal from the collar or by activating the manual switch inside your home. The collar's signal is digitally coded so that only your dog's collar will activate the panel. As previously stated, the Solo door can be opened by any magnet. This is a highly unsecure system. The Plexidor, Petsafe Smart Door and Petsafe Passport door all use radio frequency coding to open the panel. This is more secure than Solo's magnets but RF signals are easily jammed by stray radio signals in the environment (TVs, radios, cell phones, etc.). Indeed, some of the most common complaints about these doors is that the signal gets jammed and the dog can't get in or out. Power Pet's ultrasonic signal is robust and cannot be jammed by stray RF signals, and its patented digital coding can't be jammed even by stray environmental ultrasound producing the most secure and reliable electronic dog door made.
These keys are similar in size and weight to a "C" cell battery