EDS3496-3-0600-000 EDS8446-1-0025-000 EDS8446-1-0100-000 HYDAC Pressure Switch 600 bar

Product Overview

The EDS3000/8000 series electronic pressure switches are compact electronic pressure switches engineered by HYDAC for industrial hydraulic and pneumatic applications, combining a pressure sensor, pressure switch, and digital display in a single device. They are widely used for hydraulic system pressure monitoring, limit value alarming, accumulator charging control, and process automation.

This product range covers the EDS3496 (EDS 3400 series) and EDS8446 (EDS 8000 series):

• EDS3496-3-0600-000 (Material No. 908837): EDS 3400 series, range 0–600 bar, 1 switching output + 1 analog output (4–20mA / 0–10V), UL approved

• EDS8446-1-0025-000 (Material No. 920856): EDS 8000 series, range 0–25 bar, 1 PNP transistor switching output, UL approved

• EDS8446-1-0100-000 (Material No. 920859): EDS 8000 series, range 0–100 bar, 1 PNP transistor switching output, UL approved

The EDS3000/8000 series utilizes a thin-film DMS (strain gauge) on a stainless steel membrane measuring cell, offering high accuracy, high reliability, and long service life. The products provide PNP transistor switching outputs and analog output options, with switching points and reset points independently adjustable via the membrane keypad.

Our complete range of HYDAC electronic pressure switches strictly adheres to OEM technical standards, achieving 100% direct interchangeability with original components. Every unit undergoes 100% simulated operating condition bench testing prior to shipment, ensuring performance parameters are fully consistent with genuine HYDAC products. Direct replacement significantly reduces equipment downtime and maintenance costs.

⚠️ Model Code Decoding:

• EDS = Electronic Pressure Switch

• 3496 / 8446 = Product series code

• 3 (EDS3496 series) = 1 switching output + 1 analog output

• 1 (EDS8446 series) = 1 PNP switching output

• 0600 / 0025 / 0100 = Measuring range (bar)

• 000 = Standard configuration

Technical Specifications 

EDS3496-3-0600-000 (Material No. 908837)

• Product Series: HYDAC EDS 3400 series electronic pressure switch

• Model Code: EDS3496-3-0600-000

• Material Number: 908837

• Brand: HYDAC

• Product Type: Compact electronic pressure switch (with digital display)

• Measuring Range: 0 – 600 bar

• Type of Pressure: Relative (gauge)

• Pressure Units: BAR / PSI / MPA (switchable)

• Switching Outputs: 1 switching output

• Analog Output: 4–20mA / 0–10V (switchable)

• Electrical Connection: M12×1 / 4-pin

• Mechanical Connection: G1/4 ISO 1179-1 / internal

• Display: 4-digit LED

• Supply Voltage: Refer to EDS 3400 series standard (typically 9.6–32 V DC)

• Ingress Protection: Refer to EDS 3400 series standard (typically IP67)

• Approvals: UL approved

• Weight: Approx. 0.12 kg

EDS8446-1-0025-000 (Material No. 920856)

• Product Series: HYDAC EDS 8000 series electronic pressure switch

• Model Code: EDS8446-1-0025-000

• Material Number: 920856

• Brand: HYDAC

• Product Type: Compact electronic pressure switch (with digital display)

• Measuring Range: 0 – 25 bar

• Overload Pressure: 80 bar

• Burst Pressure: 200 bar

• Type of Pressure: Relative (gauge)

• Pressure Units: BAR / PSI / MPA (switchable)

• Switching Outputs: 1 PNP transistor switching output

• Electrical Connection: M12×1 / 4-pin

• Mechanical Connection: G1/4 A ISO 1179-2 / external

• Recommended Tightening Torque: 20 N·m (15 lbf·ft)

• Display: 4-digit, 7-segment LED, digit height 4.5 mm

• Supply Voltage: 9.6 – 32 V DC

• Maximum Total Current Consumption: 0.535 A

• Maximum Switching Current: 250 mA

• Accuracy (Typical) : ≤±0.5% FS per DIN 16086

• Accuracy (Max) : ≤±1% FS

• Repeatability: ≤±0.5% FS

• Temperature Compensation (Zero/Span) : ≤±0.02% FS/°C typical; ≤±0.03% FS/°C max

• Long-Term Drift: ≤±0.25% FS/year

• Response Time: < 10 ms

• Switching Cycles: > 100 million

• Compensated Temperature Range: -25°C to +85°C

• Operating Temperature Range: -25°C to +100°C

• Wetted Parts Material: Stainless steel

• Seal Material: FKM (Fluorocarbon elastomer)

• Ingress Protection: IP67

• Approvals: UL approved

• Weight: Approx. 70 g

EDS8446-1-0100-000 (Material No. 920859)

• Product Series: HYDAC EDS 8000 series electronic pressure switch

• Model Code: EDS8446-1-0100-000

• Material Number: 920859

• Brand: HYDAC

• Product Type: Compact electronic pressure switch (with digital display)

• Measuring Range: 0 – 100 bar

• Type of Pressure: Relative (gauge)

• Pressure Units: BAR / PSI / MPA (switchable)

• Switching Outputs: 1 PNP transistor switching output

• Electrical Connection: M12×1 / 4-pin

• Mechanical Connection: G1/4 A ISO 1179-2 / external

• Display: 4-digit LED

• Supply Voltage: 9.6 – 32 V DC

• Ingress Protection: IP67

• Approvals: UL approved

• Weight: Approx. 70 g

Key Technical Advantages

1. Thin-Film DMS Technology for High Accuracy and Long-Term Stability

The EDS3000/8000 series utilizes a thin-film DMS (strain gauge) on a stainless steel membrane measuring cell. The EDS3496 series achieves accuracy ≤±0.5% FS typical; the EDS8446 series achieves accuracy ≤±0.5% FS typical per DIN 16086, repeatability ≤±0.5% FS, and long-term stability of 0.25% FS/year.

2. Flexible Switching and Analog Output Configurations

EDS3496-3-0600-000 offers 1 switching output + 1 analog output (4–20mA / 0–10V switchable). The EDS8446 series offers 1 PNP transistor switching output with load capacity up to 250 mA. Switching points and reset points can be independently set via the membrane keypad, with support for switch delay times and N/O or N/C function selection.

3. Compact Robust Design for Harsh Industrial Environments

The EDS8000 series features a compact all-metal design with IP67 ingress protection, capable of withstanding over 100 million switching cycles. The EDS3496 series also features a robust sensor cell design with UL approval ensuring product safety and reliability.

4. 4-Digit LED Display with Keypad Programming

Equipped with a 4-digit LED display showing real-time pressure values. The membrane keypad enables easy configuration of switching points, reset points, hysteresis adjustment, and display unit switching (bar / psi / MPa)—simple and intuitive operation.

5. Wide Range Coverage for Diverse Application Needs

The EDS3496 series covers 0–600 bar ultra-high-pressure ranges; the EDS8000 series covers 0–25 bar to 0–600 bar multiple ranges. This batch covers 25 bar, 100 bar, and 600 bar options—suitable for applications from low-pressure pneumatics to ultra-high-pressure hydraulics.

6. Excellent Temperature Characteristics and Fast Response

The EDS8446 series offers temperature drift ≤±0.02% FS/°C typical and ≤±0.03% FS/°C max, maintaining stable measurement accuracy across wide temperature ranges. Response time < 10 ms meets the demanding requirements of dynamic pressure measurement.

7. 100% Direct Interchangeability and Simulated Condition Testing

All models strictly adhere to HYDAC original mounting dimensions and interface standards (G1/4 ISO 1179-1 / G1/4 A ISO 1179-2, M12×1 electrical connection), enabling direct drop-in replacement of original pressure switches without piping modification or system adjustment. Every unit undergoes 100% simulated operating condition bench testing prior to shipment, ensuring consistent, stable performance at rated pressure and temperature.

Application Areas

• Hydraulic System Pressure Monitoring: System pressure detection and limit value alarming for hydraulic power units and stations

• Accumulator Charging Control: Precise control and monitoring of accumulator charging functions

• Pump and Compressor Control: Automatic start/stop and pressure protection for pumps and compressors

• Hydraulic and Pneumatic Equipment: Pressure monitoring and indication for various hydraulic and pneumatic equipment

• Construction Machinery: Pressure monitoring for excavators and wheel loaders

• Process Technology: Pressure monitoring and alarming in industrial process control

• High-Switching-Frequency Applications: Demanding applications requiring millions of switching cycles

Expert Maintenance Tips

1. Verify Model and Range Compatibility Prior to Installation

The EDS3000/8000 series offers multiple range options (25 bar, 100 bar, 400 bar, 600 bar, etc.). Confirm that the range indicated in the model code covers the system operating pressure. For optimal accuracy and service life, it is recommended that maximum operating pressure not exceed 80% of the full scale.

2. Correct Installation Torque and Sealing

The EDS8446 series features G1/4 A ISO 1179-2 external thread pressure connections with recommended torque 20 N·m (15 lbf·ft) . The EDS3496 series features G1/4 ISO 1179-1 internal thread connections. Use OEM-specification O-rings for sealing—PTFE tape must not be used (it may block internal sensor passages). Ensure piping is clean prior to installation to prevent debris from damaging the sensor diaphragm.

3. Electrical Connection Precautions

• EDS3496-3-0600-000 features M12×1 / 4-pin electrical connection

• EDS8446 series features M12×1 / 4-pin electrical connection

• Supply voltage is 9.6–32 V DC

• Observe correct polarity—reverse connection may damage the device

4. Programming and Parameter Setting

• Menu navigation via membrane keypad

• Switching points and reset points can be independently set

• Supports switch delay time setting

• Output function selectable between N/O (normally open) or N/C (normally closed) 

• Display units (bar/psi/MPa) can be freely switched via the menu

5. Mounting Position and Orientation

The EDS3000/8000 series can be mounted in any orientation. For applications with severe vibration or shock, mechanical decoupling via a flexible pressure hose connection is recommended to protect the sensor from vibration damage.

6. Periodic Calibration and Functional Checks

Perform calibration checks every 12 months or according to system criticality to verify that the deviation between displayed value and actual pressure remains within specification. The EDS8446 series offers long-term stability of 0.25% FS/year. If abnormal signal drift or display anomalies are observed, arrange for servicing or replacement.