Product Description

The Keyence ET-90 is an ultra-compact, shielded inductive proximity sensor amplifier designed for precise detection of non-ferrous metals such as aluminum and copper. Its compact size makes it ideal for applications with limited space. The sensor features a 15-turn sensitivity adjustment and a 1-turn hysteresis adjustment, allowing for fine-tuned detection settings. It offers both Normally Open (N.O.) and Normally Closed (N.C.) operation modes, selectable via a switch. The ET-90 operates on a 12 to 24 VDC power supply and includes a 2-meter cable for flexible installation. Its robust construction ensures reliable performance in various industrial environments.​

Technical Specifications

• Model: ET-90
• Type: Shielded
• Detectable Object: Non-ferrous metals (e.g., aluminum, copper)
• Sensitivity Adjustment: 15-turn trimmer
• Hysteresis Adjustment: 1-turn trimmer (240°), approximately 2 to 10% of detecting distance (variable)
• Operation Mode: N.O./N.C. (switch-selectable)
• Temperature Characteristics: +25 to -15% max. of detecting distance at 23°C, within 0 to 50°C
• Control Output: 100 mA max. (40 V max.), Residual voltage: 1 V max.
• Disconnection Alarm Output: NPN open-collector 100 mA max. (40 V max.), Residual voltage 1 V max.
• Protection Circuit: Reversed polarity, surge absorber
• Indicator Lamp: Output: Red LED, Stable operation: Green LED
• Power Supply Voltage: 12 to 24 VDC, Ripple (P-P) 10% or less
• Current Consumption: 45 mA or less
• Ambient Temperature: 0 to +50°C
• Relative Humidity: 35 to 85% RH (No condensation)
• Vibration Resistance: 10 to 55 Hz, Double amplitude 1.5 mm, 2 hours in each of the X, Y, and Z directions
• Weight: Approx. 80 g (including 2-meter cable)
• Accessories: Dedicated mounting bracket, plastic screwdriver​