Kemikal Death - Industrial Waves

Time for changing the genre — here's some very cool electronica by Kemikal Death, great beats and some very cool sounding instrument/sample at the very beginning which I can't quite identify. Any hints?

Song: Kemikal Death - Industrial Waves (2:21 min, 3.2 MB)
License: CC-by-sa 2.0
Source: opsound.org