Absolute pressure sensors for hydrogen applications, 0…20 to 0…50 bar / 4012A
4012A
Main features / advantages
- Pressure ranges from 0 … 20 bar to 0 … 50 bar
- Compensated temperature range: -20 … 50°C
- Thread sizes: M12x1, M14x1.25
- Media compatibility: hydrogen and hydrogen mixture
- Gold-plated diaphragm
- Suitable for dynamic pressure measurements
In the sensors of Type 4012A, the pressure acts on a silicon load cell via a thin steel diaphragm and via oil as the transmission medium. The load cell contains implanted piezoresistive resistors connected to provide a Wheatstone measuring bridge. This bridge is unbalanced due to the action of pressure, producing an output signal that is proportional to the pressure. The sensor is specifically designed to ensure sensor stability and minimize the effects of hydrogen. The sensor components are manufactured from hydrogen compatible stainless steel. The sensor features gold-plated diaphragm to reduce hydrogen diffusion and ensure stable measurements. The Type 4012A has fully shielded cabling in order to deliver better signal quality. Kink protection minimizes cable damage. Connections, extension cables and amplifiers are standardized throughout the digitally compensated DS sensor family, which is equipped with PiezoSmart. This means that Type 4012A can be integrated seamlessly with piezoresistive amplifiers Type 4624A (single channel), Type 4665B (SCP / KiBox1) and Type 4667A (KiBox2).