Yarnell Security provides complete security systems and 24/7 monitoring for home and business customers throughout the central Pennsylvania area. Our companies have been in business since 1967. We are family owned and operated and enjoy a solid reputation throughout the community for trust and value.

Service You Can Trust

Yarnell Security offers the oldest locally owned central monitoring station in the Lancaster community, providing comprehensive monitoring services by experienced, professional security personnel 24 hours a day, 7 days a week.

We are a UL LISTED MONITORING, INSTALLATION AND SERVICE COMPANY. We are members of the Lancaster Chamber of Commerce, Associated Builders and Contractors, and have NICET CERTIFIED personnel on staff.

State-of-the-Art Security Equipment

From burglar and fire systems to high-end security cameras, medical alert services and GPS monitoring, we offer state-of-the-art security solutions for every home and business need. Our customized systems provide as little or as much security as you require for your circumstances and budget.


Your security and peace of mind is our top priority. We understand that you aren't buying equipment or technology. You want to ensure the safety of your family, your employees and your property. That's why we focus on solutions and recommend systems that achieve your goals. Only you can decide what is best for you, your family and your business. We make sure you understand every detail and carefully explain all the options so you can make the best decision possible!