1pair 20m Simple Beam Alarm Photoelectric Infrared Sensor Detector Home Door Security System

Description:
This pair of infrared detector need install them at the opposite positions. There is a infrared area between these two detector parts. When someone passes the infrared region for an adjusted response time, the detector will send alarm signal, great for security system in school, office building, hospital, parking and home yard, etc.

Features:
Made of high quality plastic shell, eco-friendly, durable and sturdy to use.
Create a reliable and invisible infrared beam up to 20 meters.
Infra-red frequency: 1.92Khz; Power supply: DC 12V; Wave length: 940nm.
Half egg shaped, input: RX 15mA-TX 30mA, operating temperature: -10℃ to 70℃
Range can be reduced to 30% in bad weather conditions: fog, rain, dust, etc.

Specification:
Condition: 100% New Brand
Color: Black
Shell Material: Plastic
Receiver Range : Less than 20m
Infra-red Frequency: 1.92KHZ
Wavelength: 940nm
Voltage: DC 12V
Input: RX 15mA-TX 30mA
Operating Temperature: -10℃ to 70℃
Relay Output: 1A max 30V, constant open/close, can be set by jumper wire
Size (L x W x T): Approx. 76 X 49.2 X 21.6mm / 3 x 1.9 x 0.9inch
Package Weight: Approx. 130g

Package Included:
1 x Transmitter
1 x Receiver
1 x Set of Accessories
1 x User Manual

Note:
1.The best installation height should be more than 20 cm, distance is not less than 2 meters. 
2.Infrared protection device should be installed vertically, and at the same level.
3.First installing receiver, then installing transmitter. When the off light of receiver is turning off, then fixed it, installation finished.
4.Distance between receiver and transmitter need be more than 1m, otherwise it will be insensitive phenomenon.