PrehKeyTec SIK-21-NUM Keypad

Designed for demanding industrial and military deployments, the PrehKeyTec SIK-21-NUM keypad provides reliable numeric input in environments exposed to dust, moisture, and continuous mechanical use. It features a sealed silicone surface combined with an abrasion-resistant polyurethane coating, ensuring consistent operation even when wearing gloves. The keypad is IP65 rated, preventing ingress of dust and water jets, supporting use in washdown and dusty locations. It meets MIL-STD-810G standards for vibration and shock resistance, providing durability against field stresses.

Red LED backlighting enhances visibility under low light conditions, reducing operator errors. The device operates across a wide temperature range from -30°C to +50°C, suitable for varied industrial climates. With over one million keystrokes per key and custom programmable options, it supports long service life and flexible integration. The SIK-21-NUM connects via a USB interface, drawing less than 500mA with lighting included, and mounts securely using a 75mm VESA system. Its black finish and robust construction make it a practical choice for continuous-duty numeric data entry in harsh conditions.

SIK-21-NUM Features

  • Adjustable Key Illumination
  • IP65 & Resistant To Liquids
  • Keys Resistant To Abrasion
  • Designed To Meet MIL-STD 810G
  • Customisation Available On Request

Request a Quote

Product Type

IP Rating

Manufacturer

Country Of Manufacture

Germany

Certifications

CE, RoHS compliant, Declaration of Conformity, EN 55022:2010, FCC Part 15 Subpart B Class A, EN 55024:2010, EN61000-4-2

Custom Options Products

Cable Type,Cable Length,Interface,Keypad Layout,Custom Macro,Epoxy Coating,PU Coating

Extended Warranty

Available On Request

Housing Colour

Black

Backlight

Key illumination can be adjusted in duration and intensity

Cable

USB interface (<500 mA including lighting), others available on request

Colour

Black (similar to RAL 9011)

Connectivity

USB interface (<500 mA including lighting) , others available on request

Housing Colour

Black

Impact Protection Rate

IP65

Interface

USB - Other Interfaces available on request

Key Material

Abrasion Resistant PU Coating

Key Spacing

18 mm key pitch

Power

<500 mA including lighting

Programmable

Custom Programmable - Contact Us

Shock

Vibration MIL-STD 810G; Method 514.6 – Functional

Mechanical Shock MIL STD 810G; Method 516.6, Procedure 1

Thermal Shock-40° F to +158° F/-40° C to +70° C

Supply Current

<500 mA

Supply Voltage

+5 Volts

Lifetime

> 1 Million Operations Per Key

Operating Temperature

–30 C to + 50 C

Storage Temperature

-30 C to 70 C

The PrehKeyTec SIK-21-NUM Keypad is designed and engineered for use in demanding environments where reliability, durability are essential. The SIK-21-NUM supports a wide range of industries and operational applications.

Common deployment industries include: Defence And Military, Energy and Utilities, Food And Beverage Processing, Industrial Manufacturing, Marine And Offshore, Oil and Gas, Rail And Transport, Security And Surveillance.

Across these sectors, the SIK-21-NUM is typically used in applications such as Health, Safety, And Compliance Inspections, Industrial HMI And Machine Interfacing, Process Control And Shop-Floor Monitoring, Quality Control And Inspection, Secure Access, Authentication, And Control Terminals.

These examples demonstrate the versatility of the SIK-21-NUM across both industry sectors and real-world operational use cases. Its suitability extends well beyond the scenarios listed above, making it a flexible solution for a broad range of requirements.

For further information, or to assess whether the SIK-21-NUM is appropriate for your specific application, please contact us.

The PrehKeyTec SIK-21-NUM Keypad comes with a 1 Year Limited Warranty against defects in workmanship and materials, effective from the date of shipment (unless otherwise agreed in writing).

To receive service under this warranty, the eligible product, PrehKeyTec SIK-21-NUM Keypad, must be presented to RUGGED in the United Kingdom.

For more information about the PrehKeyTec SIK-21-NUM Keypad or to arrange repairs and services not covered by the warranty, please visit the warranty section on our website.

  • Alternative Products

    Discover a range of alternatives that offer comparable features and quality to the product you’re viewing.

    Our selection of similar items provides diverse options, allowing you to explore different designs, functionalities, and styles tailored to your preferences. Each product has been carefully chosen to ensure it meets the high standards you expect, enabling you to make a well-informed decision based on your unique requirements.

    Browse through our related products and find the perfect match that complements your choice seamlessly.

    • IP65 sealing for dust and water resistance
    • MIL-STD-810G vibration and shock protection
    • LED backlighting for low-light visibility
    • Glove-friendly silicone and PU-coated keys
  • Having trouble finding what you're looking for?


    Selecting the right product for your specific application and environment can be quite challenging. At Rugged, our team of experts is on hand to assist you in making the best choice. Whether you have questions about product specifications or require guidance through our range of solutions, we’re here to help.

    With our extensive industry knowledge and commitment to quality, we can ensure you find the ideal solution tailored to your needs.

    Contact Us
  • Frequently Asked Questions

    • If you are unsure which product is best suited to your requirements, you can contact us directly for expert guidance. Share details such as your use case, environment, compatibility needs, and budget, and we will help you select the most appropriate solution.

    • RUGGED offers free technical support for the lifetime of products you purchase. This includes help with setup, troubleshooting, and integration. Support is available online or directly from the technical team

    A rugged keypad is an input device specifically engineered for resilience and performance in demanding settings. Unlike conventional keypads, a rugged keypad is built to endure extreme temperatures, moisture, dust, vibrations, and impact, making it ideal for industrial, military, and outdoor applications.

    These keypads often feature robust materials such as stainless steel, sealed enclosures for protection against ingress, and vandal-resistant designs. Their construction ensures reliable operation and a long lifespan, even when exposed to contaminants or subjected to heavy use. Rugged Limited offers a range of high-quality rugged keypads designed to meet diverse operational needs, providing dependable data input solutions in the toughest environments.

    Rugged Limited provides keypads specifically engineered to be a . Their design prioritises ease of use in challenging environments where operators often need to wear gloves.

    Key features that make Rugged Keypads suitable for glove use include:

    • Tactile Feedback: The keys are designed to provide clear, discernible feedback, allowing users to confirm key presses without needing to remove their gloves.
    • Appropriate Key Spacing: Keys are spaced and sized to prevent accidental presses, a common issue when operating with gloved hands.
    • Durable Materials: Constructed from robust materials, these keypads can withstand rigorous use in various industrial and outdoor settings, ensuring consistent performance.

    These design considerations ensure that whether you are in a manufacturing plant, a construction site, or any other demanding environment, the Rugged Limited keypad range remains fully functional and responsive, providing reliable input capabilities.

    Rugged Limited offers a range of keypads that are specifically engineered for panel mounting. These keypads are built to be robust and durable, making them ideal for integration into various industrial and demanding environments.

    Our selection includes options that provide secure and seamless flush mounting, ensuring a clean and integrated look with your equipment. When looking for a Panel Mount Rugged Keypad, you can expect models designed for easy installation and long-term reliability in challenging conditions.

    We specifically focus on solutions that allow for efficient and reliable operation even in the toughest settings, making Rugged Limited keypads a strong choice for applications requiring a secure and integrated Panel Mount Rugged Keypad.

    Rugged Limited specialises in providing custom rugged keypad solutions tailored to various applications. They understand that off-the-shelf keypads may not always meet the unique demands of every project, which is why they offer extensive customisation options for their products.

    When you need a custom rugged keypad, Rugged Limited can work with you to design a layout that perfectly suits your needs, ensuring optimal functionality and integration. This bespoke approach allows for the creation of a custom rugged keypad that aligns with specific operational workflows and environmental challenges.

    Rugged keypads find extensive utility across various sectors due to their robust construction and ability to withstand harsh conditions. The rugged keypad applications span from retail and commercial point-of-sale (POS) systems to industrial automation where exposure to dust, liquids, and extreme temperatures is common. These keypads are also crucial in marine environments, providing reliable data entry on ships and offshore platforms.

    Furthermore, Rugged Limited’s keypads are designed for critical data input in hazardous areas, ensuring operational continuity and safety. Their durability makes them suitable for public access terminals and kiosks, where they endure frequent and sometimes forceful use. The diverse range of rugged keypad applications highlights their essential role in maintaining functionality and data integrity in demanding operational settings.

    Rugged Limited provides a range of industrial and military-grade keypads, many of which feature backlighting options. This crucial feature ensures optimal visibility and usability in low-light environments, making our keypads suitable for deployments where consistent illumination is vital. The integration of a backlit rugged keypad design helps maintain operational efficiency and accuracy, regardless of external lighting conditions.

    Our commitment to delivering highly functional and durable solutions means we prioritise features that enhance user experience in demanding settings. The availability of a backlit rugged keypad across various models underscores our dedication to meeting the specific needs of industries requiring robust and reliable data input devices.

    Rugged Limited offers a range of keypads designed for demanding environments, and many models feature robust waterproofing. For instance, keypads such as the RKM102 are sealed to IP67 specifications, ensuring they are waterproof and able to withstand immersion in water without damage. This level of protection makes them ideal for outdoor use or in settings where exposure to liquids is common.

    When considering a waterproof rugged keypad, it’s important to check the specific IP rating of the product to ensure it meets the requirements of your application. Rugged Limited’s sealed keypads are manufactured with durable materials to prevent water ingress and maintain functionality in challenging conditions.

    Rugged Limited provides a comprehensive selection of keypads built to withstand challenging outdoor conditions. These keypads are engineered with features that ensure durability and performance when exposed to the elements.

    Key characteristics of an Outdoor Rugged Keypad from Rugged Limited include:

    • Robust Construction: Made from materials such as stainless steel, they offer excellent resistance to vandalism and wear.
    • Environmental Protection: Many models feature IP (Ingress Protection) ratings, such as IP65, indicating protection against dust and water jets, which is crucial for outdoor installations.
    • Temperature Resistance: Designed to operate efficiently across a wide range of temperatures, from extreme cold to intense heat.
    • Illumination Options: Available with backlighting, making them usable in low-light conditions typically found outdoors.

    Our commitment to quality ensures that each outdoor rugged keypad delivers consistent functionality and longevity, even in the most demanding public or industrial outdoor settings.

    Quality Refurbished Products

    Tell us what you need and how the devices will be used. Share details such as product type, quantities, condition requirements, budget, and timeframe so we can recommend the most suitable refurbished rugged solution for your application.

    Need to Recover Your Data?

    No need to panic — at Rugged we can help. Complete the online form or get in touch using the contact details below.

    How Can We Help You?

    We're here to assist and guide you with any enquiries you may have.

    Simply complete the online form or reach out using the contact details provided below.

    How Can We Help You?

    We're here to assist and guide you with any enquiries you may have.

    Simply complete the online form or reach out using the contact details provided below.