PRIMARY STANDARDS 6000 SERIES High accuracy deadweight tester, 6 ranges between –1 and 40 bar, standard accuracy 0.025%, optional 0.01% of reading, 2 test ports, working fluid – gas, optional vacuum kit, delivered with adaptor kit. 6000 L SERIES High accuracy deadweight tester, for low pressure ranges, 5 ranges between 10 and 1000 mbar, pressure / vacuum, standard accuracy 0.025%, optional 0.01% of reading, 2 test ports, working fluid – gas, optional vacuum kit, delivered with adaptor kit. 9000 SERIES High accuracy hydraulic deadweight tester, 9 ranges between 1 and 2000 bar, standard accuracy 0.025%, optional 0.015% of reading, 2 test ports, optional vacuum kit, embodiment with motor-powered pump, option 2 pistons, delivered with adaptor kit. 2000 SERIES High accuracy hydraulic deadweight tester, 4 ranges between 1 and 700 bar, accuracy 0.025% of reading, delivered without adaptor kit. PDW SERIES High accuracy portable hydraulic/gas deadweight tester, 5 ranges between 0.01 and 1 bar (gas), pressure / vacuum, 3 ranges between 0.2 and 700 bar, standard accuracy 0.025%, optional 0.015% of reading, delivered with adaptor kit.