Over the years the Tripwire units have changed somewhat in size and capabilities to match client requests.
The original Tripwire units were quite large and sometimes difficult to hide in an urban situation and therefore we decided to shrink the units and split the sensor and camera into two separate modules.
Clients also wanted a solution to enable complete vision in pitch black environments or where ambient light simply wasn’t available. We determined to take all this on board and evolve the Tripwire set further so the end package allowed for everything the client could want for half the price of inferior after the fact technologies.