Product Description

The Keyence EX-305 is a cylindrical inductive gauging sensor head designed for precise displacement measurement in industrial automation applications. With a measuring range of 0 to 1 mm and a resolution of 0.04% of full scale, it ensures high accuracy in detecting small positional changes. The sensor offers both voltage (0 to 5 V) and current (4 to 20 mA) analog outputs, providing flexibility for various control systems. Its response frequency is selectable between high (18 kHz) and low (1.3 kHz), accommodating different measurement speeds. The EX-305 features an NPN open-collector disconnection alarm output, enhancing system reliability. Housed in a cylindrical form factor (ø5.4 mm), it is compatible with the EX-201 amplifier unit. The sensor operates within an ambient temperature range of -10 to +60°C and is rated IP67 for environmental resistance. With a weight of approximately 45 g, including a 3-meter cable, the EX-305 is suitable for integration into compact spaces in automated systems.​

Technical Specifications

• Model: EX-305
• Type: Sensor head
• Amplifier Unit: EX-201
• Shape: Cylindrical (ø5.4 mm)
• Measuring Range: 0 to 1 mm
• Analog Output:
• Voltage: 0 to 5 V (Output impedance: 100 Ω)
• Current: 4 to 20 mA (Applicable load: 0 to 350 Ω)
• Resolution: 0.04% of full scale (Response frequency: LOW)
• Linearity: ±1% of full scale
• Response Frequency:
• High: 18 kHz (-3 dB)
• Low: 1.3 kHz (-3 dB)
• Disconnection Alarm Output: NPN open-collector, 100 mA max. (40 V max.), Residual voltage: 1 V max. (N.C.)
• Functions: Auto-zero function, Response frequency selecting function
• Temperature Characteristics: 0.03% of full scale/°C
• Power Supply Voltage: 12 to 24 VDC ±10%
• Current Consumption: 240 mA max.
• Environmental Resistance:
• Enclosure Rating: IP67
• Ambient Temperature: -10 to +60°C (No freezing)
• 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. 45 g (including nuts and 3-meter cable)