Accurate density measurement of cement slurries is critical to ensure proper hydrostatic pressure control during cementing operations. FANN offers two mud balance models for this purpose:
FANN Model 140 Mud Balance — Standard field instrument for cement slurry density determination, graduated in lb/gal, g/cm³, lb/ft³ and psi/1000ft. 
FANN TruWate Model 141 Pressurized Mud Balance — For cement slurries containing entrained air or gas, providing true density measurement under pressure.