- The J57AB and J157AB are the Petroleum specific Refractometers in the Rudolph Research Refractometer Product Line. The Rudolph Research J57AB and J157AM refractometers have temperature control and WU measurement features needed for testing required in the petroleum industry.
- Designed specifically for the petroleum industry and specifically for measurement of urea, (WU) in diesel engine fuel additives, in accordance with DIN 70071 and ISO 22241-2.
- The Rudolph J57AB refractometer is ideal for the petrochemical and petroleum industries working with diesel fuels as it displays results in refractive index (RI) which the operator may then use to automatically calculate, display, and print the WU number from the internal scale system. The Rudolph J157AB has the WU calculations built-in automatically calculating results.