The 8421 Encoder (Horizontal) is an absolute position encoder with 16 positions (0–F) using BCD/8421 encoding. Unlike incremental encoders or potentiometers, the mechanical position directly determines the output code — no memory, reference point, or continuous counting is required. Simply read the position whenever you need it.

This makes the encoder highly reliable with strong interference resistance, and it retains position without power. The horizontal-mount form factor is suited for panel or PCB mounting where the shaft axis runs parallel to the board.

Key Features

• Absolute Position Encoding – 16 positions (0–F) with 8421 BCD output
• No Memory Required – Position is always readable without reference homing
• Horizontal Mount – Shaft axis parallel to the mounting surface
• 10,000 Step Service Life – Durable for industrial applications

Specifications

• Encoding: 8421 BCD, 16 positions (0–F)
• Operating Current: 150 mA
• Max Voltage: 42V
• Service Life: 10,000 steps
• Operating Temperature: −40°C to +85°C
• Dimensions: 14 × 19 mm
• Mounting Aperture: 2.0 mm
• Mounting Hole Pitch: 15 mm

Also Available

• 8421 Encoder – Vertical

Package Contents

• 1× 8421 Encoder (Horizontal)

Resources

• DFRobot Wiki – 8421 Encoder Horizontal