Boasting a whopping 750kg of holding force - a very impressive figure for this type of strike release - the Alpro AL150 is a high end strike release designed for rim nightlatches like the traditional 'Yale Locks' found on so many doors all over the UK. These allow you to set up an access control system to work with an existing rim nightlatch so you don't have to fit new electronic locks or modify the door in any way. You can simply replace the keeper on the frame, with this electronically controlled keeper, known as an electric strike release.
With an IP56 rating, these can be considered weather-resistant, which means even if your situation is not under ideal conditions (ie, dry and sheltered), these should have no problem standing up to a normal degree of weather-wear. But of course as with anything, the better you maintain it, the longer it will last under any conditions!
Off-the-shelf these are set to fail-unlocked. However you can easily switch this to fail-locked. Instructions for this can be found the fitting instructions at to top of the page.
Fail-locked means that the strike draws power in order to release the door, so in the event of power failure, the door will not be freely opened. Fail-unlocked means that the strike needs to be permanently energised in order to stay closed, and will release the door when power is cut, so in the event of power failure, the door would be free to open and would not be kept closed by the strike. The right choice is dependant on the application, but in most cases you would go for a fail-locked solution, with a power supply that has a battery-backup feature.
These can also be used in both 12v and 24v DC setups, there's no polarity on the power input so these will accept either. On 12v these will draw around 200mA and then of course on 24v they would consume 100mA as expected.