AP-31K Keyence Two-Color Digital Pressure Sensor | Negative Pressure NPN

AP-31K Keyence Two-Color Digital Pressure Sensor – Negative Pressure, NPN Output

Key Technical Specifications

• Brand: Keyence
• Model: AP-31K
• Series: AP-30 series
• Category: Digital pressure sensor (negative pressure, NPN)
• Rated pressure: 0 to -29.9 inchHg gauge pressure
• Detectable range: -15% to +110% of full scale
• Fluid compatibility: Air and non-corrosive gases
• Display: 3½-digit, 2-color, 7-segment LED with 11 mm character height
• Resolution: 0.1 inchHg, 0.1 kPa, 1 mmHg, or 0.001 bar
• Response time: Selectable at 2.5, 5, 100, or 500 ms with chattering prevention
• Temperature characteristic: ±1% of F.S. maximum at 25 °C within 0 to 50 °C

Electrical Performance

• Supply voltage: 12 to 24 VDC with ±10% tolerance
• Current consumption: 50 mA maximum at 24 V, 90 mA maximum at 12 V
• Output type: NPN open collector with two outputs (N.O./N.C. selectable)
• Control output rating: 100 mA maximum at 40 V maximum, residual voltage 1 V maximum
• Analog output: 1 to 5 V with a minimum load impedance of 47 kΩ
• Built-in communication: None, and no protocol or expansion support

Environmental Durability

• Operating temperature: 0 to +50 °C without freezing
• Relative humidity: 35 to 85% RH without condensation
• Proof pressure: 72.5 PSI for pressure resistance
• Vibration resistance: 10 to 55 Hz at 1.5 mm double amplitude, 2 hours per axis
• Protection rating: Not available for this model
• Note: The sensor suits clean, non-corrosive gas environments

Physical Construction

• Weight: Approximately 120 g
• Front housing: Polyamide for rugged daily use
• Front panel sheet: PET for display clarity and wear resistance
• Rear housing: Polysulfone for chemical stability
• Pressure port: Die-cast zinc for a solid connection
• Cable: Oil-proof cabtyre cable for industrial environments

Installation Guide

• Mount the sensor on a flat surface and keep the pressure port clear of debris.
• Connect the pressure port to your negative pressure line with suitable tubing.
• Wire the 12 to 24 VDC supply and confirm polarity before you apply power.
• Set the N.O./N.C. output mode and response time to match your process needs.
• Adjust the setpoint and check the two-color display for stable readings.
• Keep the unit away from corrosive gases and condensing moisture at all times.

Package Contents

• One AP-31K Keyence digital pressure sensor unit
• One protective packaging box for safe transport
• Standard shipping through FedEx, UPS, or DHL

Why Engineers Trust This Sensor

• The 11 mm two-color LED display supports quick visual checks on the line.
• Selectable response times from 2.5 ms to 500 ms adapt to fast or slow processes.
• Two NPN outputs with N.O./N.C. options simplify control panel wiring.
• Analog output from 1 to 5 V supports data logging and remote monitoring.
• The AP-30 series from Keyence offers proven reliability in factory settings.

FAQ

• Q: What is the rated pressure range of the AP-31K?
  A: The sensor measures 0 to -29.9 inchHg of negative gauge pressure.
• Q: Which fluids can I use with this sensor?
  A: You can use air or any non-corrosive gas with the unit.
• Q: What response time options does the AP-31K offer?
  A: You can select 2.5, 5, 100, or 500 ms, with chattering prevention.
• Q: What display resolution does this model provide?
  A: It shows 0.1 inchHg, 0.1 kPa, 1 mmHg, or 0.001 bar.
• Q: What output configuration does the sensor use?
  A: It provides two NPN open collector outputs with N.O./N.C. selection.
• Q: Is the product new and in stock?
  A: Yes, we supply brand new original units and hold stock for fast order processing.
• Q: How fast do you ship orders?
  A: We dispatch orders within 5 days through common carriers such as DHL.
• Q: What is the return policy?
  A: We support 30-day returns on eligible purchases.

Contact Information

• Inquiries: sales@nex-auto.com
• Phone/WhatsApp: +86 153 9242 9628
• Partner NexAuto Technology Limited: https://www.nex-auto.com/