SIKO Draw-Wire Position Sensor

 

Part Number: 348-30370 001

Series: MWE32 (inferred from MEW 32 M1)

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1. General Description

 

The SIKO 348-30370 is a compact, draw-wire (or “string pot”) sensor from the MWE32 series. It is designed to measure linear position by translating the extension of its flexible steel wire into a proportional electrical signal.

It operates by winding a wire onto a spring-loaded drum, which is coupled to a precision potentiometer. As the wire is pulled out, the potentiometer rotates, changing its resistance. This design allows for the measurement of relatively long linear distances with a very compact sensor body, making it ideal for integration into machinery, hydraulic cylinders, and automation systems.

 

Key Features 🎯

 

• Draw-Wire Principle: Measures linear position using a retractable steel wire.
• Defined Measurement Length: This specific model is configured for a 365 mm stroke.
• Potentiometric Output: Provides a simple, 3-wire analog resistive output.
• Compact Housing: The MWE32 series is known for its miniature, ø32 mm housing.
• Robust Construction: Features a durable metal housing suitable for industrial environments.

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2. Technical Specifications

 

 

Performance & Mechanical Data

 

Parameter	Value
Measurement Length (ML)	365 mm
Housing Diameter	32 mm
Housing Material	Aluminum
Wire Material	Stainless Steel (typically coated)
Retraction Force	1.8 … 3 N (Typical for MWE32 series)
Max. Extension Speed	0.8 m/s (Typical for MWE32 series)

 

Electrical Data

 

Parameter	Value
Output Type	Potentiometer (3-wire resistive)
Resistance	Not specified on label. Typical values for the series are 1 k$\Omega$ or 5 k$\Omega$.
Linearity	$\pm$0.25% of full scale (Typical for MWE32 series)
Max. Supply Voltage	< 30 VDC (Applied to potentiometer)
Connection	3-pin connector or cable

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3. Wiring (Standard Potentiometer)

 

This sensor provides a 3-wire resistive output.

• Pin 1: Potentiometer Start (Connect to 0V / GND)
• Pin 2 (Wiper): Analog Signal Output (0…100% of input voltage)
• Pin 3: Potentiometer End (Connect to Supply Voltage, e.g., +10V or +24V)