ETS3228-5-100-000 ETS326-2-100-000 ETS3226-3-100-000 HYDAC Temperature Switch 600 bar

Product Overview

The ETS3200 series electronic temperature switches are compact electronic temperature switches engineered by HYDAC for industrial hydraulic and process control applications, combining a temperature sensor, temperature switch, and digital display in a single device. They are widely used for hydraulic oil temperature monitoring, cooling system control, and process temperature protection.

The ETS3200 series belongs to the ETS 3200 product family, featuring an integrated temperature probe particularly suitable for direct tank or pipeline installation. Probe lengths are available in 18 mm and 100 mm options. Pressure-resistant versions are rated up to 600 bar, enabling direct installation on hydraulic manifolds or in pipelines.

This product range covers the following models:

• ETS3228-5-100-000 (Material No. 909621): 2 PNP switching outputs + 1 analog output (4–20mA / 0–10V), 100 mm probe length, UL approved

• ETS326-2-100-000 (Material No. 909618): 2 PNP switching outputs (no analog output), 100 mm probe length, 3-digit LED display

• ETS3226-3-100-000 (Material No. 909525): 1 PNP switching output + 1 analog output (4–20mA / 0–10V), 100 mm probe length, UL approved

Our complete range of HYDAC ETS3200 electronic temperature 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:

• ETS = Electronic Temperature Switch

• 3226 / 3228 / 326 = Product series code

• 2 / 3 / 5 = Output configuration (2 = 2 switching outputs; 3 = 1 switch + 1 analog; 5 = 2 switches + 1 analog)

• 100 = Temperature probe length (100 mm)

• 000 = Standard configuration

Technical Specifications 

ETS3228-5-100-000 (Material No. 909621)

• Product Series: HYDAC ETS3200 series electronic temperature switch

• Model Code: ETS3228-5-100-000

• Material Number: 909621

• Brand: HYDAC

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

• Temperature Probe: Integrated, length 100 mm

• Measuring Range: -25°C to +100°C

• Pressure Resistance: 600 bar (50 MPa)

• Switching Outputs: 2 PNP transistor switching outputs

• Analog Output: 4–20mA (2-wire) or 0–10V

• Switching Load Capacity: Up to 1.2 A per output

• Accuracy (at Room Temperature) : ≤ ±1.0°C

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

• Electrical Connection: M12×1 / 5-pin

• Mechanical Connection: G1/2 A DIN 3852 (male)

• Installation Torque: 45 N·m

• Supply Voltage: 18 – 35 V DC

• Max Current Consumption (inactive switching output) : 35 mA

• Max Current Consumption (switch + analog output) : 55 mA

• Seal Material: FKM

• Wetted Parts Material: Stainless steel

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

• Ingress Protection: IP65 / IP67

• Approvals: UL approved

• Weight: Approx. 150 g

ETS326-2-100-000 (Material No. 909618)

• Product Series: HYDAC ETS3200 series electronic temperature switch

• Model Code: ETS326-2-100-000

• Material Number: 909618

• Brand: HYDAC

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

• Temperature Probe: Integrated, length 18 mm

• Measuring Range: -25°C to +100°C

• Pressure Resistance: 600 bar

• Switching Outputs: 2 PNP transistor switching outputs

• Analog Output: None

• Switching Load Capacity: Up to 1.2 A per output

• Display: 3-digit LED

• Electrical Connection: M12×1 / 4-pin

• Mechanical Connection: G1/2 A DIN 3852 (male)

• Supply Voltage: 20 – 32 V DC

• Current Consumption: 100 mA

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

• Ingress Protection: IP65

• Approvals: UL approved

• Weight: Approx. 150 g

ETS3226-3-100-000 (Material No. 909525)

• Product Series: HYDAC ETS3200 series electronic temperature switch

• Model Code: ETS3226-3-100-000

• Material Number: 909525

• Brand: HYDAC

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

• Temperature Probe: Integrated, length 100 mm

• Measuring Range: -25°C to +100°C

• Pressure Resistance: 600 bar (50 MPa)

• Switching Outputs: 1 PNP transistor switching output

• Analog Output: 4–20mA (2-wire) or 0–10V

• Switching Load Capacity: Up to 1.2 A per output

• Accuracy (at Room Temperature) : ≤ ±1.0°C

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

• Electrical Connection: M12×1 / 4-pin

• Mechanical Connection: G1/2 A DIN 3852 (male)

• Installation Torque: 45 N·m

• Supply Voltage: 18 – 35 V DC

• Max Current Consumption (inactive switching output) : 35 mA

• Max Current Consumption (switch + analog output) : 55 mA

• Seal Material: FKM

• Wetted Parts Material: Stainless steel

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

• Ingress Protection: IP65 / IP67

• Approvals: UL approved

• Weight: Approx. 150 g

Key Technical Advantages

1. High-Precision Temperature Measurement with Digital Display

The ETS3200 series utilizes high-precision temperature sensing elements with accuracy ≤±1.0°C at room temperature. Equipped with 3-digit or 4-digit LED digital displays, real-time temperature readings enable convenient on-site monitoring and fault diagnosis.

2. 600 bar Ultra-High Pressure Resistance for High-Pressure Hydraulic Systems

Pressure-resistant ETS3200 models feature 18 mm or 100 mm integrated temperature probes with pressure resistance up to 600 bar. This enables direct installation in high-pressure pipelines or hydraulic manifolds without additional pressure reduction devices, making them particularly suitable for oil temperature monitoring in construction machinery, injection molding machines, and other high-pressure hydraulic systems.

3. Flexible Switching and Analog Output Configurations

The ETS3200 series offers diverse output configuration options:

• ETS3228-5-100-000: 2 PNP switching outputs + 1 analog output (4–20mA / 0–10V)

• ETS326-2-100-000: 2 PNP switching outputs

• ETS3226-3-100-000: 1 PNP switching output + 1 analog output

Each output handles loads up to 1.2 A. Switching points and hysteresis can be independently adjusted via the keypad to meet diverse application control requirements.

4. Keypad Programming with Extensive Parameter Adjustment

Menu-driven programming via membrane keypad enables independent adjustment of switch points and hysteresis, switch delay setting (0.00–750 seconds) , N/O or N/C output selection, and window function configuration. Intuitive operation requires no specialized software for complete parameter setup.

5. Compact Robust Design for Harsh Industrial Environments

The ETS3200 series features a compact, robust construction with IP65/IP67 ingress protection. All wetted parts are manufactured from stainless steel with FKM seals, capable of withstanding temperatures from -25°C to +100°C. UL approval ensures product safety and reliability.

6. 100% Direct Interchangeability and Simulated Condition Testing

All models strictly adhere to HYDAC original mounting dimensions and interface standards (G1/2 A DIN 3852 mechanical connection, M12×1 electrical connection), enabling direct drop-in replacement of original temperature 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 temperature and pressure.

Application Areas

• Hydraulic System Oil Temperature Monitoring: Tank temperature monitoring and cooling system control for hydraulic power units and stations

• Construction Machinery: Hydraulic oil temperature monitoring and overheat protection for excavators, wheel loaders, cranes

• Injection Molding Machinery: Hydraulic system temperature control and cooling circuit management for injection molding and die-casting machines

• Lubrication Systems: Temperature monitoring and alarm for industrial gearboxes and bearing lubrication systems

• Process Control: Process temperature monitoring and control in chemical and pharmaceutical industries

• Wind Power: Gearbox oil temperature monitoring and cooling system control for wind turbines

Expert Maintenance Tips

1. Verify Model and Range Compatibility Prior to Installation

The ETS3200 series offers multiple output configurations and probe length options. Confirm prior to installation:

• Output configuration meets system control requirements (1/2 switching outputs, with/without analog output)

• Probe length meets installation depth requirements (18 mm / 100 mm)

• Measuring range (-25°C to +100°C) covers system operating temperature

2. Correct Installation Torque

The ETS3200 series features G1/2 A DIN 3852 male thread connections. Use a torque wrench during installation—recommended torque is 45 N·m. Use OEM-specification O-rings or bonded sealing washers—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 probe.

3. Probe Installation Depth

Integrated temperature probes must be fully immersed in the medium. The ETS326-2-100-000 18 mm probe is suitable for thin-wall pipelines or compact installation spaces; the ETS3228/ETS3226 100 mm probes are suitable for tanks or deep-hole installations. Ensure the probe tip does not touch the bottom or walls to guarantee measurement accuracy.

4. Electrical Connection Precautions

• ETS3228-5-100-000: Features M12×1 / 5-pin electrical connection

• ETS326-2-100-000: Features M12×1 / 4-pin electrical connection

• ETS3226-3-100-000: Features M12×1 / 4-pin electrical connection

• Supply voltage: ETS3228/ETS3226 18–35 V DC; ETS326 20–32 V DC

• Observe correct polarity during wiring—reverse connection may damage the device

5. Programming and Parameter Setting

• Menu navigation via membrane keypad

• Switch points and hysteresis can be independently adjusted

• Supports switch delay time setting (0.00–750 seconds)

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

• Display units (°C/°F) can be freely switched via the menu

6. Mounting Position and Vibration Protection

The ETS3200 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. For tank installations, ensure the probe is positioned below the oil level to avoid measuring air temperature.

7. 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 temperature remains within specification (≤±1.0°C). If abnormal signal drift or display anomalies are observed, arrange for servicing or replacement.