ERACHECK X is a high-end dual-beam non-dispersive IR spectrometer for the highly accurate measurement of oil-in-water. Based on the inexpensive and environmentally friendly CFC-free solvent, cyclohexane, ERACHECK X measures TOG, TPH, and FOG in water in full compliance with ASTM D8193 with sub-ppm precision, offering excellent correlation to EPA 1664, ISO 9377, and OSPAR.