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40 Years
experience
Emergency
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Trusted Security Systems in Aptos, CA
Karas Technical Services was founded in 1986 with a mission to develop specialized voice-annunciated monitoring and control products for industrial and commercial applications. Over the decades, we have expanded our expertise to address law enforcement needs through innovations in land mobile communications and security technology. Our flagship product, the Sentinel Signaling System, was first introduced in 1990 and has evolved to incorporate user-recorded voice messages, wireless sensors, scheduling capabilities, and integrated video systems. All engineering, manufacturing, testing, and quality control are conducted in-house at our facility in Aptos, California, ensuring rigorous standards and customer-driven improvements.

Our commitment to reliability and practicality has made our systems a trusted choice for law enforcement, security agencies, and industrial clients nationwide. We prioritize direct collaboration with users to refine our products, reflecting our belief that effective security solutions must balance simplicity for casual users with advanced functionality for experts. With decades of experience and a focus on real-world applications, we continue to deliver durable, adaptable systems that meet evolving security challenges.
Services
Portable Radio Alarms Video Surveillance Systems Wireless Sensors Security Monitoring Remote Control Systems Telemetry Integration Law Enforcement Equipment Industrial Security Surveillance Kits Custom Alarm Systems
Details
  • Year established: 1986
Highlights and features
  • We design and manufacture all products in-house at our California facility.
  • Our systems integrate seamlessly with existing two-way radio infrastructure.
  • Decades of collaboration with law enforcement agencies inform product development.
  • Wireless sensor technology enables rapid deployment in remote locations.
  • Customer feedback directly shapes product improvements and reliability.
What people say
Proven and reliable Easy deployment Quick repair service Adaptable to applications Technical staff helpful
Services
Portable Radio Alarms
Sentinel Portable Radio Alarms transmit voice alerts directly to personnel via existing radio systems. These self-contained units use wireless sensors and programmable scheduling for intrusion detection, emergency notifications, and security monitoring. Designed for law enforcement and industrial use, they offer rapid deployment in temporary or remote locations.
Video Surveillance Systems
Sentinel Video Kits combine portable recorders, infrared sensors, and wireless triggers for temporary surveillance. The system includes waterproof cases, low-light cameras, and power management components. Ideal for stakeouts, perimeter monitoring, and evidence collection in challenging environments where permanent installations aren't feasible.
Wireless Sensor Networks
Wireless sensors activate alarms through motion detection, door/window monitoring, or vibration triggers. Components include magnetic switches, seismic detectors, and panic buttons that integrate with radio alarm systems. These sensors enable customized security configurations for vehicles, buildings, and outdoor assets.
Custom Security Solutions
We develop specialized configurations combining alarms, video, and telemetry for unique security challenges. Options include bait vehicle setups, locker room theft prevention, and multi-zone monitoring systems. Our engineering team collaborates directly with clients to adapt products for specific operational requirements.
Technical Support
Comprehensive support includes system configuration, troubleshooting, and repair services. We provide documentation, training materials, and direct technical assistance for law enforcement and industrial clients. Warranty coverage and replacement parts ensure long-term system viability.
Questions
What industries use your security systems?
Our systems serve law enforcement, industrial security, commercial businesses, and government agencies requiring portable surveillance and alarm solutions.
Can systems integrate with existing radios?
Yes, our alarms interface directly with most two-way radio systems using available adapter modules.
Are products suitable for outdoor use?
Yes, systems are designed for outdoor deployment with waterproof cases and low-light video capabilities.
Do you offer technical support?
We provide direct technical assistance, documentation, and repair services for all our products.
What warranty applies to purchases?
All products carry a one-year warranty covering defects in materials and workmanship under normal use.
Can systems be customized for specific needs?
Yes, we offer configurable options and collaborate with clients to adapt systems for unique security challenges.