AP-33A Keyence Digital Pressure Sensor – Positive Pressure, NPN, 1 MPa
The AP-33A is a Keyence positive-pressure digital pressure sensor. It delivers stable gauge pressure measurement for air and non-corrosive gases. The unit combines a clear 2-colour LED display, fast response, and flexible NPN control outputs. It suits tight integration into industrial machines, test benches, and pneumatic systems.
The sensor supports a 0 to 1.000 MPa rated range and a detectable range of -15 to +110 % of F.S. Users can select response times of 2.5 / 5 / 100 / 500 ms to balance speed and stability. Two NPN open-collector outputs offer N.O. or N.C. selection. An analogue 1 to 5 V output is also available for continuous monitoring.
Technical Specifications
| Brand | Keyence |
| Model | AP-33A |
| Series | AP-30 Series |
| Module Type | Digital Pressure Sensor Main Unit |
| Type | Positive pressure, NPN |
| Rated Pressure | 0 to 1.000 MPa |
| Measurement Range | -15 to +110 % of F.S. |
| Fluid Type | Air or non-corrosive gases |
| Pressure Type | Gauge pressure |
| Display | 3 1/2-digit, 2-colour, 7-segment LED, 11 mm character height |
| Resolution | 0.01 bar, 0.2 Psi, 0.001 MPa, 0.01 kgf/cm² |
| Hysteresis | Variable in hysteresis mode; 0.5 % of F.S. in standard mode |
| Response Time | 2.5 / 5 / 100 / 500 ms selectable |
| Analogue Output | 1 to 5 V, load impedance 47 kΩ min. |
| Control Output | NPN open collector, 100 mA max., 40 V max., residual voltage 1 V max., 2 outputs, N.O./N.C. selectable |
| Power Voltage | 12 to 24 VDC ±10 %, ripple 10 % P-P or less |
| Current Consumption | 50 mA or less at 24 V; 90 mA or less at 12 V |
| Pressure Resistance | 1.5 MPa (15 bar) |
| Ambient Temperature | 0 to +50 °C, no freezing |
| Relative Humidity | 35 to 85 % RH, no condensation |
| Vibration Resistance | 10 to 55 Hz, double amplitude 1.5 mm, 2 hours each in X, Y, Z directions |
| Material | Front housing: polyamide; front panel sheet: PET; rear housing: polysulfone; pressure port: die-cast zinc; cable: oil-proof cabtyre cable |
| Weight | Approx. 120 g |
Key Performance Highlights
- Measurement range: 0 to 1.000 MPa for positive pressure monitoring.
- Frequency response: Selectable 2.5 / 5 / 100 / 500 ms response time.
- Sensitivity: Fine resolution down to 0.001 MPa.
- Linearity: Stable gauge pressure output across the detectable range.
- Resolution: Clear readings in bar, Psi, MPa, and kgf/cm².
- Temperature range: 0 to +50 °C for standard industrial environments.
- Environmental resistance: Withstands 1.5 MPa pressure and 10 to 55 Hz vibration.
- Anti-interference: Chattering prevention function supports stable switching.
Installation Guide
- Mount the AP-33A on a flat panel or bracket.
- Connect the pressure port to clean air or non-corrosive gas lines.
- Use sealing tape or a suitable gasket to prevent leaks.
- Wire the power supply within 12 to 24 VDC.
- Keep signal cables away from high-power lines.
- Check the NPN output wiring before power-on.
Setup and Maintenance Convenience
- Front-panel keys allow quick setpoint changes.
- 2-colour LED shows status at a glance.
- Selectable N.O./N.C. logic simplifies machine integration.
- Hysteresis mode reduces false triggering.
- Oil-proof cable supports harsh factory environments.
- Routine zero adjustment and leak checks are easy to perform.
Compatibility Notes
- Works with common PLC NPN input cards.
- Analogue 1 to 5 V output fits data loggers and panel meters.
- Suitable for air and non-corrosive gas circuits.
- Not for corrosive, flammable, or liquid media unless properly isolated.
- Use with Keyence AP-series accessories and pressure ports where applicable.
Certifications and Compliance
The AP-33A follows Keyence industrial quality standards. It meets typical factory EMC and safety requirements when installed correctly. Contact us for current compliance documents and country-specific approvals.
Packing List
- 1 x Keyence AP-33A main unit
- 1 x oil-proof cabtyre cable
- 1 x protective packaging
- Documentation or test report where supplied
Warranty and Shipping
All units include a 12-month warranty. We ship by FedEx, UPS, and DHL. Tracking is provided after dispatch. Please confirm voltage, pressure type, and output logic before ordering.
Typical Applications
- Pneumatic pressure monitoring
- Leak testing and seal verification
- Vacuum and positive-pressure detection
- Machine clamping and pressing control
- Packaging and filling equipment
- Test benches and automated assembly lines
Diagnostic Capabilities
- Real-time pressure display with 2-colour status indication.
- Output switching for high and low pressure events.
- Chattering prevention for unstable pressure signals.
- Analogue output for trend monitoring and fault tracing.
- Fast response settings help locate pressure spikes.
Why Buy From Oiltech Controls?
- 15+ years in industrial automation spare parts.
- Global shipment support to many regions.
- Tested industrial surplus and refurbished options.
- 12-month warranty for added confidence.
- Technical verification before every shipment.
- Support for obsolete control systems and legacy lines.
FAQ
Q: What is the rated pressure range?
A: The AP-33A covers 0 to 1.000 MPa.
Q: What output type does it use?
A: It uses NPN open collector outputs and a 1 to 5 V analogue output.
Q: What fluid can I use?
A: Use air or non-corrosive gases only.
Q: How fast is the response?
A: You can select 2.5 / 5 / 100 / 500 ms.
Q: Is a warranty included?
A: Yes. Every unit includes a 12-month warranty.
Q: How do you ship?
A: We ship by FedEx, UPS, and DHL.
Contact Information
Email: info@oiltechcontrols.com
Phone / WhatsApp: +86 158 8020 0923
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Original Source: https://www.oiltechcontrols.com/
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