Digital refractometer for urea concentration measurement
J57AB/J157AB
Rudolph Research Analytical
of urea concentration in diesel engine additives
Standards
Designed specifically for the measurement of urea in diesel engine additives, in accordance with DIN 70071 and ISO 22241-2.
Basic Operation
The J57AB is a sub-model of the J57HA and most details on Technical Bulletin 915 apply. The J157AB is a sub-model of the J157 and most details on Technical Bulletin 911 apply. The differences between the AB models and the standard models are:
Temperature
Both instruments have improved temperature performance to better than 0.02° C, meeting the requirements of DIN 70071 and ISO 22241-2.
Scale
The J57AB displays results in refractive index and the operator uses that result to calculate the wu number; and the J157AB has the calculations built-in to display and print the wu number.
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