Introduction
This document details the specifications and features of a special spring return-type displacement sensor by Zhejiang Huiren Electronics Co., Ltd. The sensor operates on a conductive plastic principle with an imported substrate brush. It offers a measuring stroke ranging from 25mm to 100mm in 25mm increments and features a compact design with dimensions of 18x18mm. The sensor boasts a linearity of 0.1% and a lifespan exceeding 50 million cycles. It supports optional standard signal outputs of 4-20mA, 0-5V, and 0-10V through an external signal conversion box.

Electrical Specifications
The sensor's measuring strokes range from 10mm to 100mm, increasing every 25mm. Resistance values are 1KΩ for 25mm and 5KΩ for 50-100mm, with a tolerance of ±15% at 20°C. It features infinite resolution, output smoothness of ≤0.1%, and repeatability of ≤±0.01%. The power rating is 2W at 70°C, with a temperature coefficient of ≤±400PPM/°C. It has a compressive strength of 500V AC for 1 minute and an insulation resistance of ≥500 MΩ at DC 500V for 1 minute. The operating temperature range is -55°C to +125°C.

Mechanical Specifications
The mechanical travel is L+3mm, with an aluminum alloy housing treated for anti-static properties. The operating force is 4N, and the shaft is made of stainless steel. It includes a 1000mm shielded cable for termination and a multi-alloy filamentous brush wiper. The sensor is mounted using a movable mounting clamp and has an operating life of 50 million cycles. The temperature range is -55°C to 125°C, with a maximum speed of 8m/s for frequencies less than 2Hz and 3m/s for frequencies less than 5Hz. It has a protection class of IP65.

Size and Installation Note
The document includes a note emphasizing the importance of correct wiring, specifically warning against connecting the input voltage to the "2" (black) side to prevent damage to the sensor matrix and lead.