The MultiSensor from Senstar uses A.I. and a sensor fusion engine for a multiple-technology detection system.

Sensors and detectors are do-all security devices that can alert building managers to changes in motion, intrusion and environmental conditions. They have improved dramatically and now feature heightened sensing capabilities and extended range. With better outcomes and catch performance, sensors and detectors are making inroads into new applications and projects—satisfying a wide swath of challenges at the protected premises.

As the internet of things gains ground, specialty sensors have been called on to alert users to dangerous vibrations or provide information on temperature, moisture, air quality and chemicals. Audio sensors detect gunshots or violent, loud behavior. Combination vape detectors may use particulate, gas, THC oil and temperature sensors to identify smoke-­related events with greater accuracy.

Fighting false alarms

False alarms have been a downside to these products. Now, multiple sensing technologies in a single device and microprocessor intelligence relieve much of that stigma. However, as integrated systems become more common, different technologies deployed side-by-side may increase the probability of false alarms.

“Advances in A.I. and signal processing, as well as low-cost, high-performance computing hardware, offer exciting new capabilities that enable operators to maintain awareness of perimeter activity,” said Brad Martin, director of product management at Senstar Corp., Ottawa, Ontario. “But even with these technological improvements, security professionals still face a dilemma: maintaining a high probability of detection across all intrusion scenarios can lead to a corresponding increase in the rate of false or nuisance alarms.”

Martin explained that until now, true “context-aware” security devices have eluded the market. 

“Individual technologies are very good at detecting specific phenomena but can fail when detecting edge cases. To address these challenges, a holistic, converged approach is required, one that intelligently synthesizes multiple sensing technologies together,” he said.

Senstar’s MultiSensor is an A.I.-­powered intrusion detection system that uses an embedded sensor fusion engine to synthesize data from short-range radar, PIR, accelerometer and video analytics to assess the context in which an event occurs.

“This results in the highest probability of detection, enhanced situational awareness and near-zero nuisance alarms,” Martin said.

Keegan Kinslow, regional marketing manager, intrusion sensors at Bosch Security and Safety Systems Inc., Fairport, N.Y., said the latest detectors have added intelligence with a micro-electromechanical systems (MEMS) sensor. Incorporating a MEMS sensor, according to Kinslow, enables better detection capabilities and advances in false alarm immunity, and it ensures detectors are installed correctly.

“With the addition of a MEMS sensor, motion detectors become advanced security devices, delivering even more reliable detection. For example, the new Commercial Series Gen2 motion detectors utilize the MEMS sensor as an accelerometer, so the detector understands its orientation and position after being installed and powered,” he said.

Kinslow said that they way a motion detector is mounted affects its productivity.

“The MEMS sensor enables the detectors to provide a visual indication if the detector has been mounted upside down, warning the installer of the error so it can be corrected. The MEMS sensor integrated into the detector also brings the ability to recognize and filter out signals from shock and impact to the mounting surface. This will virtually eliminate potential false alarms from these types of vibrations with mounted detectors,” he said.

Picking the right product

With many products available, systems integrators need to ensure they specify the proper device for the application.

“With added security and compliance monitoring comes the risk of increased complexity for system integrators: technology integration issues, increased training requirements and maintenance difficulties. Systems integrators should partner with vendors who can provide products that have certified integrations, are easy to use, field-proven and backed by 24/7 support,” Martin said.

Kinslow said superior engineering and a focus on saving integrators time and money on installations is also critical.

“Integrators are extremely busy and struggle with a limited labor force, so manufacturers need to do everything they can to ensure fast and easy installation,” he said. “Determining the risk level of an application is another important factor. Low-cost detectors without some of the more advanced features are likely not the best options for high-risk installations. Finally, understanding the sensor’s environment is essential. Consider what could cause a false alarm. Areas with a ceiling fan, hanging signage or nearby HVAC vents will benefit from microwave adaptive processing to filter out repetitive signals caused by continual movement. Installers should also ensure the detector is positioned in the best place to ensure that a potential intruder crosses its pattern.”

Senstar Corp.