TENSOMETRIC SENSOR PR 6221
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)
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)
| MODEL | E max | Sensor accuracy class | |
| C3* | C4 | ||
| PR 6221/24 | 20 t | (0,015%) | (0,012%) |
| PR 6221/34 | 30 t | (0,015%) | (0,012%) |
| PR 6221/54 | 50 t | (0,015%) | (0,012%) |
| PR 6221/64 | 60 t | (0,015%) | (0,012%) |
| PR 6221/75 | 75 t | (0,015%) | (0,012%) |
*Sensors are also available in the version adapted to work in the Ex zone.
Accuracy class: C3, C3Ex, C4
Range: 20-75 t