Пришла мне вот такая приблуда ... вчера крутил вертел , ну не понимаю я инструкцию на Китайском.
цена приятная, заявленные характеристики то же .
Но для чего еще 3 провода выходит не пойму.
Wired Gas Detector LPG Security Alarm SAL-8497
Sensitive gas alarm
Ceil mounting, elegant design and low power consumption
Energy-saving, high stability with a long time use
Alert and warn people to stay far away from danger field when it detects the density of gas over the status
Can alarm separately or work with other product
High accuracy with durable sensor head
Loud 85dB alarm will alert you instantly and transmit the signal to its centre
Less affected by other organic solvent
Automatically resists when it is out of danger
Ideal for all kitchens, like home, hotel, restaurant and so on
Can be combined with building interphone, wired alarm system
Type Of Gas Sensed: Natural gas, town gas, LPG
Product Specifications:
Working voltage: 12V~24V DC/ 110V~220V AC
Operating current: 100mA
Sound pressure: ≥70DB/M
Operating temperature: -10℃ ~50℃
Size: (Diameter x Height) 115 x 51mm
Color: White
Weight: 120g
Package Contents: