Hydac/Bosch Rexroth Pressure Switch Replacement | PSP/PST Series Pressure Transmitter

Genlu Hydraulic proudly introduces our industrial-grade PSP and PST Series pressure switches. This series is fully engineered to match global standards, providing a seamless, high-value drop-in replacement for Hydac/Rexroth original equipment. We specifically highlight our supply capability for precision-tuned units such as the PSP2/21N-K1/K, PSP4/21N-K1/K, PSP6/21N-K1/K, and PSP8/21N-K1/K.

As the core monitoring sensor for fluid power, the PSP/PST series delivers elite switching accuracy and rugged durability. Genlu guarantees 100% Drop-in Interchangeability across standard G-thread interfaces, DIN electrical connections, and switching logic compared to original PSP/PST assemblies. Every pressure switch undergoes 100% high-frequency pressure-cycling and electrical-continuity verification on our digital test benches, certifying zero-false-alarm performance for your critical automation and mobile applications.

Technical Specifications 

• Product Series: PSP / PST Series Pressure Switch

• Representative Models: PSP2/21N-K1/K, PSP4/21N-K1/K, PSP6/21N-K1/K, PSP8/21N-K1/K

• Pressure Setting Range: 10 bar to 400 bar (Range-dependent)

• Maximum System Pressure: 500 bar

• Electrical Rating: 24V DC / 220V AC

• Mechanical Service Life: > 1,000,000 cycles

• Repeatability: ±2% of range

• Electrical Connection: DIN 43650 Standard

• Ingress Protection: IP65

Key Technical Advantages:

• High-Sensitivity Diaphragm Design: Features a high-performance metallic diaphragm for elite sensitivity to minute pressure fluctuations, ensuring crisp switching and eliminating contact chatter in high-pressure ranges.

• Superior Shock & Vibration Resistance: Internal mechanics are engineered to maintain a fixed set-point even in extreme vibration environments, such as heavy construction machinery or industrial stamping presses.

• Thermal/Chemical Stability: All seals are constructed from premium FKM (Fluorocarbon) rubber, ensuring environmental integrity and leak-free performance within an operating range of -20°C to +80°C.

• Easy Field-Adjustment: The top-mounted adjustment screw allows for threshold calibration without disturbing electrical wiring, drastically reducing maintenance time and complexity in cramped hydraulic cabinets.

Application Areas:

• Industrial Hydraulic Stations: System pressure monitoring and low/high-pressure logic signaling.

• Construction & Mobile Equipment: Outrigger locking indicators and pipeline pressure alarm systems.

• Automation & Manufacturing: Hydraulic fixture status feedback and pressure-molding process monitoring.

Expert Maintenance Tips:

• Respect Overload Limits: Avoid testing beyond 150% of the rated pressure capacity to prevent permanent diaphragm deformation and irreversible set-point drift.

• Ensure Weather-Tight Connections: While DIN connectors are IP65-rated, additional silicone sealant is recommended for outdoor applications to prevent moisture condensation and electrical shorting.

• Calibrate Under Static Conditions: For best results, adjust pressure thresholds under static fluid conditions. Use a secondary analog gauge for calibration to verify the switch set-point accuracy under fluctuating system pressures.