Video Door Phone Dealers in Amravati Road, Nagpur (8 products available)

Headquartered in Maharashtra, we are well-known Exporter and Supplier of Intrusion Alarm System. The quality of our Intrusion Alarm System is tested on defined parameters at vendors’ end. We are offering a wide range of Intrusion Detention Systems at the best possible rates. We have a vast network of distributors and logistic service providers that enables us to deliver bulk orders of Intrusion Alarm System.

• Type: Wireless Burglar Alarm
• Material: Plastic
• Color: Black, Blue, Grey, White
• Feature: Durable
• Voltage: 110V, 220V
• Power Source: Electric

Ultrasonic Sound Burglar Alarm gives alarm on interruption of Ultrasonic sound beam. The circuit arrangement for an ultrasonic burglar security system operates in accordance with the Doppler principle and comprises a transmitting transducer which is fed from an oscillator with an ac voltage and continuously transmits ultrasonic radiation during operation, a receiving transducer and a receiving circuit connected thereto and having an analysis circuit and a phase detector which continuously compares the signal received by the receiving transducer with the oscillator ac voltage to form a detection signal which is dependent upon the mutual phase angle. The detection signal is fed to the analysis circuit which responds to the ac component thereof. The circuit arrangement includes a phase-locked loop (PLL) which includes a further detector, a low-pass filter following the phase detector and an oscillator. The oscillator has its frequency controlled at a control input and may be formed as a voltage controlled oscillator (VCO). The cut-off frequency of the low-pass filter is designed to be such that only signals which can pass fundamentally without reduction are those whose frequency is lower than a critical frequency F.sub.c =c/E, where c is the speed of sound of the ultrasonic radiation in the area and E is the path of the ultrasonic radiation from the transmitting transducer to a reflective object located in the predetermined maximum range and back to the receiving transducer.Ultrasonic Sound Burglar Alarm is an ultrasonic alarm, also known as a silent alarm. This system that lets out a siren that's inaudible to the human ear. Banks typically use these types of systems. As far as home security goes, having a quick response team in place like the system's corresponding call center is an essential part of this setup. This device uses sound waves that act as motion sensors within the home. The waves are projected in beams which bounce across a room's surface areas. Passive infrared detector beams are the most commonly used, capable of detecting activity, as well as temperature changes. These beams are projected out into a room's space using a coverage lens. How this lens is configured will determine how these beams are dispersed throughout the room. As these are highly sensitive systems, proper positioning and adjustment is necessary to avoid false alarms caused by sunlight and heating systems. This unique Ultrasonic Sound Burglar Alarm makes use of the invisible, inaudible ultrasonic sound beam to detect movements. Ultrasonic transducers operate at maximum efficiency when driven at 40 kHz frequency. So an ultrasonic transmitter and receiver pair operating at 40 kHz is used to control the buzzer or the relay. The transmitter unit is built around CMOS IC CD4001 (see Fig. 1). By adjusting the 22-kilo-ohm preset (VR1), the oscillator frequency can be set to approximately 40 kHz. The ultrasonic transmitter transducer is driven by two complementary buffer stages of CD4001 and its current drain is very low. The receiver unit uses a two-stage 40 kHz preamplifier followed by switching circuit, buzzer driver, etc (see Fig. 2). Adjust VR2 in the receiver circuit till the buzzer stops sounding while the receiver senses ultrasonic sound from the transmitter. When the ultrasonic beam is interrupted by the movement of a person or any other object crossing its path, NPN transistor T4 stops conducting and transistor T5 conducts. It activates the buzzer and LED1 for three to four seconds. This duration depends on the time taken by 470µF capacitor (C9) connected at the base of transistor T5 to discharge fully through resistor R14. The burglar alarm duration can be set to a desired value with the values of C9 and R14.The alarm circuit comprising transmitter, receiver and associated circuits operates off a 9-12V regulated power supply. The receiver circuit requires regulated 12V. You can also use unregulated power supply here. Align the ultrasonic transducer such that the signal falls directly on the ultrasonic receiver. The piezobuzzer (BZ1) can be replaced with a relay to control the mains-operated alarm.

7" Touch Screen & Physical Buttons Pixel:800*480, Aluminum Surface Shell Digital Photo Frame Function Supports Second Outdoor Unit at the Entrance of Individual Apartments SD Card Slot (up to 32G) Support SD Card to Download Doorbell Music (MP3 Format) Smart Home Control Protocol (485 Interface) 8 Zone Alarm, Three-state Detection Support Alarm, Door Contact, Gas and Smoking Sensors, Manual Alarm, Infrared Sensor Intercom between Apartments Record Massage RJ45 Wiring Port

• Door Phone: Electronic Locks
• Biometric Locks: Card Based Locks

We are offering video door phone. Door phones: - video and audio door phones are the very fast selling convenience and security product in these days of dacketis with the help of this there is no need to open the door for the unknown person, just see the image of person coming to your door on the monitor of the phone and talk if you want him to come in, just push a switch on the phone and the door will open. This can be made multi station also so that in apartment, a unknown person cannot enter into the apartment. digital locks:- digital locks is a device where you no need to carry keys with you when going some where out now you can lock your home by just entering the code. access control system: - with the help of this you can restrict access of unauthorized person by biometric readers, proximity and smart cards, this will make your time attendance and payroll management very easier. entry systems: - metal grill gates, boom barriers, tripod and shutters are the latest product in this range all the devices are operated with a single click of remote.

Alarm Systems, fire frighting equipments

AUTOMATION SYSTEMS

closed circuit tv camera, fire extinguisher repairing services