The highest contrast ratio of the Philips 19S1S is 25000:1. That's 100% less contrast ratio than a 20000000:1 PC monitor, which is the most common contrast ratio. Small monitors that have been available for more than two years dynamic contrast ratios range from Mega Contrast to 100000000:1.
We think you might also be interested in some of the other PC monitors that have a 25000:1 dynamic contrast ratio currently available including the Philips 17S1AB which is cheaper.
If the contrast ratio of this small monitor is too low for you then you might also want to look at the E20T-6 (2000000:1 and cheaper), or the E19-7 (£148.31) (2000000:1 and cheaper) both from Fujitsu or the Philips 191EL1SB (1000000:1 and cheaper).