- Type: Negative pressure, Zero shift, NPN
- Rated pressure: 0 to -101.3 kPa
- Fluid type: Air or non-corrosive gases
- Type of pressure: Gauge pressure, air or non-corrosive gases
- Display: 3 1/2-digit, 2-color, 7-segment LED (Character height: 11 mm 0.43″), Display cycle: 5 times/s
Free Shipping over $50 For Domestic Shipping
12-Month Warranty
Hassle-Free Returns Within 30 days
Over 5,000 parts in stock
- Brand: Keyence
Keyence AP-31ZA Two-Color Digital Display Pressure Sensor, Main, -101.3 kPa, NPN
Mfr # AP-31ZA
Condition: New
*Some photos may appear used, but your item will be delivered in new, unused condition.
$160.57
/ea
Availability: In stock|Ships in 3 to 5 business days
- 100% Original
- Ships from USA; Free Shipping on orders over $50
- Hassle-Free 30-Day Returns
- 12-Month Warranty for all products
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Images on this website are for illustration and reference purposes only and may differ from the actual product.
- Negative-Pressure Measurement: Accurately measures vacuum levels from 0 to -101.3 kPa, ideal for monitoring low-pressure systems.
- NPN Output Type: Provides reliable signal output compatible with a wide range of industrial automation devices.
- High-Visibility LED Display: Features a 3 1/2-digit, 2-color, 7-segment LED display with 11 mm (0.43″) character height and a 5-times-per-second refresh rate for clear, easy-to-read readings.
- Versatile Fluid Compatibility: Supports air and non-corrosive gases, allowing for safe and precise operation in multiple industrial applications.
The Keyence AP-31ZA is a highly precise negative-pressure main unit designed for robust industrial and laboratory applications. Built to measure vacuum levels from 0 to -101.3 kPa, this unit provides reliable monitoring of low-pressure systems, making it suitable for processes where accurate vacuum detection is critical, such as pneumatic systems, cleanroom environments, or laboratory instrumentation.
A key feature of the AP-31ZA is its NPN output, which ensures seamless integration with a variety of automation controllers, PLCs, and other industrial devices. This output type provides stable and consistent signals, facilitating reliable process control and data acquisition. Its compatibility with standard industrial equipment enhances overall system efficiency and reduces the risk of miscommunication between devices.
The unit’s display is designed for maximum clarity and usability. A 3 1/2-digit, 2-color, 7-segment LED display presents measurements with a character height of 11 mm (0.43″), providing clear visibility even from a distance. With a display update cycle of five times per second, users can monitor rapid pressure changes in real time, making it particularly useful in dynamic or fast-paced processes. The dual-color display allows for easy distinction between operational states, warnings, or threshold exceedances, improving situational awareness on the production floor.
Additionally, the AP-31ZA is compatible with air and non-corrosive gases, ensuring safe operation across diverse industrial environments. This flexibility allows the unit to be employed in various applications, including vacuum control, leak detection, and pressure monitoring in pneumatic or laboratory systems. Its durable construction and precise calibration make it a reliable choice for critical monitoring tasks.
Compact yet highly functional, the Keyence AP-31ZA negative-pressure main unit combines accurate measurement, clear display, and versatile integration capabilities. It is an essential instrument for industries seeking reliable, precise, and visually intuitive pressure monitoring solutions.
| Manufacturer | Keyence |
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FAQ
What is your warranty policy?
All new products purchased from Enicstra LLC are backed by a 12-month warranty. We will repair any covered issue at no cost. If a repair is not possible, we will provide a full refund. For warranty support, please email customerservice@enicstra.com.
What happens if an item has a lead time longer than two weeks?
If an item requires a lead time of more than two weeks, we will notify you immediately. Your order will only be confirmed once you acknowledge and approve the lead time.
What is your returns policy?

If you are dissatisfied with the part(s) you received for any reason (subject to our Terms and Conditions), you may take advantage of our 30-day return-to-base policy, which allows you to request an exchange or a full refund.
Do you offer global delivery?

Yes, we offer reliable worldwide shipping. Our efficient logistics network allows us to process and ship orders to customers across the globe with ease and precision.
Please note: All international orders may be subject to customs duties, taxes, and import fees, which are the responsibility of the recipient. Enicstra does not collect or cover these charges.
How will the orders be shipped?

Enicstra partners with trusted carriers including USPS, UPS, FedEx, and DHL to ensure safe and timely delivery of every order.
We offer free domestic shipping on orders over $50. For international orders, additional shipping costs will apply based on the destination and selected carrier service.
Who can I contact if something goes wrong?

If you have any questions or encounter any issues with your order, please reach out to our Customer Support Team at customerservice@enicstra.com. We’re here to help and will respond as promptly as possible.
How can I cancel my order?

If you wish to cancel your order, please contact us at customerservice@enicstra.com as soon as possible. All cancellation requests are subject to approval by Enicstra LLC and must comply with our Terms and Conditions.
Do you offer discounts for bulk orders?
Yes, we offer special pricing for bulk purchases. If you’re interested in ordering in large quantities, please contact us at sales@enicstra.com to discuss volume discounts and customized quotes.
What payment options and currencies do you accept?
We aim to make your purchase seamless by offering multiple payment options, including bank transfers, PayPal, and major credit and debit cards such as Visa, MasterCard, and American Express. We accept payments in most major global currencies, although we prefer US Dollars (USD) transactions. Payments in other currencies may incur additional charges.

How long is my quote valid?

Our quotes are valid for 30 days from the date they are issued unless otherwise specified at the time of quotation.

Do you offer trade credit agreements?

Yes, we understand the importance of trade credit in business operations and provide credit agreements upon request, subject to eligibility. For more information, please contact our team.

Do you accept sales tax exemption certificates?
Yes. If your organization is tax‑exempt (e.g., reseller, nonprofit, government, educational), please email a copy of your valid exemption certificate to customerservice@enicstra.com.
Our team will review and apply the exemption to your account/orders. To avoid being charged tax, please send the certificate before placing your order (or we can refund the tax after verification if the order has already been placed).
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