EPE-Filter Differential Pressure Indicator

 

Manufacturer: EPE-Filter (Ketsch, Germany)

Type: Electrical Clogging Indicator (WE)

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1. General Description

 

This device is an electrical differential pressure indicator (clogging indicator) manufactured by EPE-Filter (now part of the Bosch Rexroth group / Kensch). It is designed to monitor the contamination level of hydraulic filters.

The device measures the pressure drop across a filter element. When the pressure drop exceeds a preset limit (indicating the filter is clogged), the internal switch activates, sending an electrical signal to a control system to trigger a maintenance alarm. This unit features a robust aluminum housing capable of withstanding high operating pressures up to 400 bar.

Key Features 🎯

 

• High Pressure Rating: Suitable for hydraulic systems with operating pressures up to 400 bar.

• Universal Switching: Features a changeover contact (SPDT), allowing for flexible wiring (Normally Open or Normally Closed).

• High Voltage Compatibility: Can switch voltages up to 220 V.

• Dual Indication Options: The label indicates options for “WO” (Visual) and “WE” (Electrical). This specific unit is equipped with the electrical connector for remote monitoring.

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2. Technical Specifications

 

Performance Data

 

Parameter	Value
Max. Operating Pressure (Betriebsdr.)	400 bar
Switching Pressure (Schaltdr.)	1.5 bar or 4.2 bar (Model dependent – check specific unit marking)
Function	Differential Pressure Monitoring
Media	Hydraulic Oil, Lubricants

Electrical Data

 

Parameter	Value
Switch Type	Umschalter (Changeover / SPDT)
Switching Voltage	0 … 220 V (AC/DC)
Max. Switching Current	0.5 A
Max. Load / Power	10 W / 30 VA
Connector	DIN 43650 (Valve Plug Style)

Mechanical Data

 

Parameter	Value
Housing Material	Aluminum / Steel
Process Connection	Threaded (for insertion into filter housing)
Seal	O-Ring

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3. Wiring Diagram

 

The label provides a specific pin-to-color mapping for the electrical connection.

• Pin 1 (sw / Black): Common (COM)

• Pin 2 (br / Brown): Normally Closed (NC)

• Pin 3 (bl / Blue): Normally Open (NO)

Operation Logic:

• Normal State (Clean Filter): Circuit between Pin 1 (Black) and Pin 2 (Brown) is CLOSED.

• Alarm State (Clogged Filter): When pressure drop exceeds the setpoint (e.g., 4.2 bar), the switch activates. Pin 1 connects to Pin 3 (Blue), signaling the alarm.

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Meta Description Options

 

Option 1 (SEO-focused):

Datasheet for EPE-Filter electrical clogging indicator. Specs: 400 bar max pressure, 220V/0.5A SPDT switch, for monitoring hydraulic filter status.

Option 2 (Concise):

EPE-Filter Ketsch differential pressure switch datasheet. 400 bar operating pressure, changeover contact, 10W/30VA rating.

Option 3 (Application):

Technical data for EPE hydraulic filter indicator. Learn about this 400 bar differential pressure switch with SPDT output for detecting clogged filters.