Scully

About Scully Signal Company

Scully Signal Company has been at the forefront of fluid detection and delivery safety since its founding in 1936. Scully is a third-generation, family-owned engineering and manufacturing company headquartered in Wilmington, Massachusetts, with a global reputation for producing self-checking fluid detection and handling systems that set the industry standard.

What began as a focused effort to solve overfill and spill problems in petroleum transport has grown into a comprehensive portfolio of safety solutions used across petroleum, aviation, chemical, mining, food & beverage, and heating oil delivery markets. Customers such as major energy companies, airlines, and railroads rely on Scully equipment because of its proven reliability in the most demanding conditions.

A Legacy Built on Safety and Innovation

Scully's core expertise spans overfill prevention controllers and sensors, static ground verification systems, retained product monitoring, vehicle identification, and water detection. Their proprietary Dynacheck® continuous self-checking circuitry is a hallmark of the brand — it ensures that the safety system itself is always functioning, not just the equipment it monitors. This fail-safe design philosophy has made Scully the benchmark for dependable liquid transfer safety worldwide.

All Scully products are proudly designed and manufactured in the United States, engineered as complete, integrated systems rather than individual components. This total-system approach means operators can trust that every element — from sensors and probes to rack controls and alarms — is engineered to work seamlessly together.

Tank Gauges & Level Monitoring

One of Scully's most recognized product lines is their range of mechanical Gauges & Sending Units. Products like the iconic Ventalarm® combination fill alarm and level indicator, the Econ-O-Gauge®, and the Golden Gallon Gauge® have been installed in hundreds of thousands of tanks across North America. These gauges deliver at-a-glance level indication while also providing audible fill alerts, protecting against costly and environmentally damaging overfills — all in a durable, leak-proof design that typically lasts the life of the tank.

Heating Oil Delivery Equipment

Scully has long served the home heating oil industry with a dedicated line of Heating Parts & Accessories. From Ventalarm® vent pipe signals to tight-fill adaptors, tank couplings, and sight glass valves, Scully's mechanical components keep residential and commercial heating oil systems operating safely and efficiently. Heating oil distributors and HVAC supply professionals consistently turn to Scully for components that simplify installation and stand up to years of reliable service.

Why Choose Scully Signal?

• Nearly 90 years of engineering excellence and continuous innovation
• Proprietary self-checking technology for fail-safe fluid detection
• Proudly designed and manufactured in the USA
• Trusted by petroleum, aviation, chemical, and heating oil industries worldwide
• Complete, integrated system design for seamless installation and operation
• Long service life with components built for demanding field conditions