The new SenSafe Cyanide from Industrial Test Systems is a test strip that does not require any chemical mixing for detecting free cyanide in water. This test strip detects levels of 0.0, 0.1, 0.2 and 0.4 ppm. Testing is intended to be simple: Collect a 50 ml sample, dip the strip for 90 seconds with motion, remove and match for the concentration of free cyanide. Other cyanide ranges also are available. Industrial Test Systems Inc.