BL508 DIFFERENTIAL PRESSURE DEADWEIGHT TESTSER The main challenge of defining AP at high line pressures comes from the very high ratio of the line pressure to the differential pressure, and the fact that relative small instabilities in the magnitude of line pressure are very large in comparison to the small magnitude of the differential pressure. The BL508 differential pressure deadweight tester uses the principle of high line differential measurement with two oil lubricated / gas operated pistons allows setting and maintaining the line pressure with an uncertainty much lower than the overall measurement uncertainty on either piston. The master and slave pistons are cross floated at the line pressure prior to making differential measurement to minimize the contribution of line pressure errors to differential pressure. ■ Measure the 1,000kPa differential pressure under the high static pressure 60MPa ■ Each piston and cylinder unit can be used separately to measure gauge pressure ■ Two oil lubricated / gas operated pistons ■ Over-pressure protection is integrated ■ Built -in oil/gas separator SPECIFICATION ■ Gauge pressure range: (0.1~6)MPa, (1~60)MPa ■ Differential pressure range: 0 to 1000kPa ■ Piston material: Tungsten carbide ■ Cylinder material: Tungsten carbide ■ Mass material: 304 stainless steels ■ Base material: Aluminium alloy, stainless steel ■ Transforming medium: Pure nitrogen ■ Lubricating medium: Sebacate, nitrogen (<20MPa) ■ Gravity: Standard 9.80665 m/s2 or custom local ■ Pressure units: MPa (bar or PSI is optional) ■ Connector: Metric (NPT or BSP is optional) ■ BL508 Differential pressure deadweight tester base ■ Piston cylinder unit (x2) ■ 304 stainless steel mass set (x2) ■ Adapter kits (NPT, BSPP) ■ Measure differential pressure transmitter ■ Primary pressure standards in laboratories Add: 1322, F/3, Bldg 1,33 Zique Rd, Haidian, Beijing 100095, China