PR 6221 TENSOMETRIC SENSOR 

The PR 6221 range of load cells is designed exclusively for use on road weighbridges. The unique design principle, combined with the installation kits, counterbalances movements caused by mechanical or thermal expansion or contraction of the weighbridge construction. GWT/PHILIPS/SARTORIUS/MINEBEA

The durability of the PR 6221 makes it ideal for working in difficult and demanding technological conditions, guaranteeing reliability. The sensor is made of stainless steel, and its housing is hermetically welded in the IP68 standard, which gives the ability to work in submersion up to 1.5 m for 10,000 hours, and IP69 K, so that they can be washed with a stream of water under pressure. They withstand overload up to 100% of nominal load without losing measurement parameters, and can also work at -30 to +95 degrees C, for verified weights from -10 to +55 degrees C.

Depending on the measurement accuracy required, the sensors are available in four accuracy classes:

• C3 (0,015% measuring range)
• C4 (0,012% measuring range)
• C5 (0,010% measuring range)
• C6 (0,008% measuring range)

The PR 6221 sensors are also professionally protected against electric discharges (in combination with a mounting box) and overvoltages, and can be used without maintenance as they do not require maintenance.

Basic technical parameters of PR6221:

• measuring range: 20t, 30t, 50t, 60t, 75t
• accuracy class: C3, C4, C5, C6 (only for sensors with a range of 20t and 30t)
• execution: stainless steel
• tightness class: IP68, IP69 K
• working temperature: from -30 to +95 degrees Celsius, with parameters from -10 to +55 degrees Celsius
• sensor supply: 4 ... 24 V
• output signal: 1mV / V (20t, 30t), 2mV / V (50t), 2.4mV / V (60t), 3mV / V (75t)
• input impedance: 1080 +/- 10 Ohm
• output impedance: for class C3: 1010 +/- 1 Ohm
• for class C5 with Emax = 50t: 760 +/- 1 Ohm
• for class C4, C5 przy Emax = 60t: 635 +/- 1 Ohm
• for class C4, C5 przy Emax = 75t: 510 +/- 1 Ohm
• intrinsically safe version: EEx ib IIC T6 certificate (PTB No. Ex-92.C.2137)
• II 1G EEx ia IIC T6 (PTB 02 ATEX 2059)

*Sensors are also available in the version adapted to work in the Ex zone.

Accuracy class: C3, C3Ex, C4
Range: 20-75 t

Typical NOs : 

Weighbridge Load Cells OIML R60 Class C3 = 0.015%
PR 6221/12,5t C3 Weighbridge Load Cell 12,5 t 9405 221 03312
PR 6221/20tC3 Weighbridge Load Cell 20 t 9405 221 03320
PR 6221/25tC3 Weighbridge Load Cell 25 t 9405 221 03325
PR 6221/30tC3 Weighbridge Load Cell 30 t 9405 221 03330
PR 6221/50tC3 Weighbridge Load Cell 50 t 9405 221 03350
PR 6221/60tC3 Weighbridge Load Cell 60 t 9405 221 03360
PR 6221/75tC3 Weighbridge Load Cell 75 t 9405 221 03375

Weighbridge Load Cells OIML R60 Class C3 = 0.015%, Ex-Version
PR 6221/12,5t C3E Weighbridge Load Cell 12,5 t 3000d Ex-vers. 9405 621 03312
PR 6221/20tC3E Weighbridge Load Cell 20 t 3000d Ex-vers. 9405 621 03320
PR 6221/25tC3E Weighbridge Load Cell 25 t 3000d Ex-vers. 9405 621 03325
PR 6221/30tC3E Weighbridge Load Cell 30 t 3000d Ex-vers. 9405 621 03330
PR 6221/50tC3E Weighbridge Load Cell 50 t 3000d Ex-vers. 9405 621 03350
PR 6221/60tC3E Weighbridge Load Cell 60 t 3000d Ex-vers. 29405 621 03360
PR 6221/75tC3E Weighbridge Load Cell 75 t 3000d Ex-vers. 9405 621 03375

Attachments:

Sartorius PR 6221.pdf

133 kB