Here is pinout for lpgtech pts01 and stag ps-02, they are same except different resistance on temp sensor.
Pin #4 is second MAP sensor , maybe it can be used for altitude correction if you dont connect it to engine.
I suppose pin#2 LPG temp, (-40-125C) and pin#3 gas pressure (0-6,75bar) should be connected to anytrim inputs on vems (sensor outputs 0-5v signal)
Hope this pinout helps someone...