PR 6251 PanCake Level Sensor

The PR 6251 range of load cells is specially designed for easy weighing of silos and horizontal tanks. The unique design principle ensures a very compact construction. As a result, existing applications can also be upgraded very easily. The range distinguishes itself above all for its unmatched reliability, robustness and stability, which enable trouble-free operation without adjustment, year after year. Special measuring element geometry ensures that the transmission of force into the sensor is always at the optimum level. This minimizes the effect on measurement accuracy whilst a high overload range, high repeatability and good linearity are maintained. There is a particularly wide working temperature range attributable to special resistance strain gauge technology. The hermetically sealed enclosure and special TPE cable allow the unit to be used even under extreme operating conditions in harsh production environments. The entire measurement chain can be calibrated without the use of a reference weight. A version is also available with a direct output of 4-20 mA. This facilitates easy and cost-effective integration into an existing application. An explosion-proof (Ex) version of this range of load cells is also available, as an option, for use in intrinsically safe environments.




  • Easy mounting

  • Stainless steel construction

  • Hermetically welded sealed, IP68(depth of 1.5m for 10,000 hrs.), IP 69K

  • Ex-version available (LE)

  • Direct 4... 20 mA output (LA)

  • Only 25/35 mm installation height


Load Cell Construction:

  • Hermetically sealed, welded stainless steel construction, filled with Polyurethane.



  • 500 kg... 10 t 1.4021 (DIN 17440), 420 S 37 (B.S.); 16 t 1.4542 (DIN 17440), S 604/S 622 (B.S.), 17-4 PH (Int.)



  • IP68, IEC 529, equivalent to NEMA 6. The load cell can be submerged in water to a depth of 1.5 m for 10,000 hours. Robust, flexible, screened

  • Sheath: Thermopl. Elastomere

  • Colour: grey (LE: blue, LA/LAC: green)

  • Diameter: 5 mm, wires 4 x 0.35 mm2

  • Length: 5 m


Bending Radius:

  • Fixed installation: ≥ 50mm; Flexible installation: ≥ 150mm


Certificate of Conformity:

  • Approval: II 1G EEx ia IIC T6, II 1D IP65 85°C; Approval No.: PTB 02 ATEX 2059, TÜV 03 ATEX 2301x