Qio-tek ASP 5033 Airspeed sensor i2c

I’ve just connected i2c 5033 to my PixHawk1-1M. I’m using an i2c splitter so I can also connect a rangefinder. The rangefinder works (SU04) but the airspeed sensor isn’t registering anything. For the rangefinder I needed to enter the address 112, is there an i2c address I need to use for the 5033, or are there any other options I need to set?