HYDAC HDA 4700 4400 4800 Series Pressure Transmitter | HDA4744-A-016-000 HDA4744-C-400-000 | Hydraulic Pressure Sensor

Chengyuan Hydraulic presents the HDA Series pressure transmitters, meticulously engineered as high-precision replacements for HYDAC industrial sensors. This range includes flagship models such as HDA 4744, HDA 4444, and HDA 4845, essential for pressure monitoring and control in hydraulic and pneumatic systems. Utilizing DMS (strain gauge) technology on a stainless steel diaphragm, these sensors provide exceptional stability and ruggedness. Chengyuan ensures 100% Drop-in Interchangeability regarding electrical connections (e.g., DIN 43650), mechanical threads (e.g., G1/4), and output signals (4-20mA or 0-10V). Backed by our 100% Simulation Load Testing, each unit is calibrated across its full range and fatigue-tested, ensuring precise real-time data feedback in the harshest industrial environments.

Technical Specifications 

• Corresponding Models: HDA 4744-A, HDA 4744-C, HDA 4444-A, HDA 4845-E

• Measuring Ranges: 0..16 bar, 0..250 bar, 0..400 bar, up to 0..600 bar

• Output Signals: 4 .. 20 mA (A-type), 0 .. 10 V (C-type), 4 .. 20 mA 3-wire (E-type)

• Supply Voltage: 12 .. 30 V DC (21 .. 30 V DC for 0-10V output)

• Accuracy (at calibration): ≤ ± 0.25 % FS typ.

• Non-linearity (BFSL): ≤ ± 0.15 % FS max.

• Operating Temperature Range: -40 °C .. +85 °C

• Media Temperature Range: -40 °C .. +100 °C

• Housing Material: Stainless steel (1.4301 / 304)

• Electrical Connection: DIN 43650 (4-pin) or M12x1

• Protection Class: IP 65 (when correctly plugged)

Key Technical Advantages:

• Advanced Thin-Film Technology: The sensor cell utilizes stainless steel thin-film strain gauges with no O-ring seals. The fully-welded design eliminates leakage risks caused by aging seals and ensures superior long-term stability.

• Robust EMC Performance: Integrated circuits are designed with enhanced electromagnetic compatibility, meeting international standards. This guarantees smooth signal output even in environments with high-frequency interference from large inverters.

• Dynamic High-Speed Response: With a response time of < 1ms, these sensors capture instantaneous pressure spikes, providing critical data for millisecond-level overload protection.

• Rugged Mechanical Design: The full stainless steel enclosure provides excellent resistance to vibration (up to 20g) and mechanical shock, making it ideal for high-vibration mobile machinery applications.

Application Areas:

• Industrial HPUs: Accumulator pressure monitoring and pump station feedback.

• Injection Molding: Precise control of injection and holding pressure.

• Mobile Machinery: Load-sensing systems for excavators and cranes.

• Renewable Energy: Hydraulic pressure measurement in wind turbine braking and pitch control.

Expert Maintenance Tips:

• Installation Torque: Use a wrench for installation; the recommended torque for G1/4 threads is 25-30 Nm. Avoid over-tightening to protect the seal washer.

• Air Bleeding: When measuring liquid pressure, install the sensor at a position that avoids air trapping to prevent cavitation at the sensor head, which could affect accuracy.

• Shielding: For maximum precision, use shielded cables and ground the shield at one end to filter out high-frequency industrial noise.