VESDA (an abbreviation of Very Early Smoke Detection Apparatus) is a laser based smoke detection system. The name VESDA has become a generic name for most air sampling applications. The name VESDA is a trade mark of Xtralis. Having been operating within specialist fire detection applications for over 20 years, the VESDA system has a proven track record and has been developed beyond traditional fire alarms, to the point where it is recognised as the most advanced aspirating smoke detection system within the fire industry, holding more certifications than any other aspirating smoke detector in the world. Rodent Repellent System. We are considered as one of the topmost Manufacturers and Suppliers of Electronic Rodent Repellent Devices in India. The Rodent Repellent System, manufactured by us, works using advanced ultrasonic technology. ... Our well-designed rodent repellant systems are highly cost effective.