Table of Contents Smoke from combustion is an upward motion and will quickly drift to the ceiling. The smoke alarm can detect fire through
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Smoke Detector RS485
It is a device that uses the photoelectric principle to detect the smoke generated during a fire. The accuracy of photoelectric smoke detectors usually does not cause so many false alarms. This smoke detector is installed through wiring, which avoids the late-night call caused by battery replacement. The alarm uses photoelectric smoke devices and excellent production technology, stable work, simple installation, no need to debug.
- Model: LH-94(II)-T
- MOQ: 1 PCS
- Delivery date: within 24 hours
- Price: $34
About - Smoke Detector
Smoke detectors are essential safety devices in modern homes, workplaces, and public buildings, providing early warning before a fire hazard escalates into a major emergency. Proper installation and maintenance of smoke alarms play a crucial role in reducing fire-related injuries and fatalities. Renkeer offers wired smoke detectors for multi-point monitoring and centralized surveillance, suitable for residential and commercial use, providing reliable protection. Our smoke alarms deliver fast and accurate alerts, protecting workers and their families from the dangers of fire.
Parameters
- Rated voltage: DC10V-24V
- Static current: ≤10mA
- Rated current: ≤40mA
- Output contact capacity: 3A/120VAC or 3A24VDC
- Operating environment: -10℃~+55℃, <95% (non-condensing)
- Electrostatic discharge immunity: Contact Discharge 6KV, Air Discharge 8KV
- Measuring area: 40m², Floor Height less than 6m
- Interface: RS485
- Standard: GB4715-2024
- Dimensions: 100*42mm
Features
Our smoke detector is designed to detect smoke produced by fires. It features a flame-retardant ABS shell, resistant to high temperatures and corrosion, providing strong protection for the built-in photoelectric sensing element. A mesh detection window prevents insects and dust from entering, avoiding interference with normal operation. The smoke detector incorporates a microprocessor for 360° all-around smoke monitoring. Its integrated ceiling-mount design provides strong resistance to electromagnetic interference (EMI) and radio frequency interference (RFI). A built-in buzzer provides a loud alarm when smoke is detected. Furthermore, it features sensor-based pollution monitoring, providing a light alert when pollution levels exceed safe limits. Our smoke detector supports RS485 output and Modbus protocol, making it suitable for integration and secondary development, and complies with 3C mandatory certification.
Application
Our smoke detectors can accurately detect the fine smoke of smoldering fires in their early stages, providing early warnings and preventing small fires from spreading into major fire accidents. This is an industrial-grade wired smoke detector that requires no disassembly for battery replacement, making it suitable for various layouts and requiring no subsequent maintenance. It can be widely used for fire safety detection in shopping malls, hotels, shops, warehouses, computer rooms, residential buildings, and other locations.
FAQs - Smoke Detector
Why buy a smoke detector?
As the number of users of smoke detectors continues to increase, the number of deaths caused by residential fires is also declining. Studies have shown that in the event of a fire, the chances of escape for people in residences with smoke alarms installed will be 50% higher than that of residences without installations. It is necessary to install an alarm in every bedroom.
What are the types of smoke alarms?
There are 2 types of smoke alarm technology-ionization and photoelectric. Ionization smoke alarms usually have a stronger response to flame burning (such as pan fires or smoke produced during cooking). Photoelectric alarms are usually more sensitive to smoldering fires, such as cigarettes, overheating of electrical wires, or high temperatures similar to space heaters.
Where to install smoke detector?
The smoke detector installs inside and outside the sleeping area. Install a smoke sensor for every 60 square meters indoors (the specific area depends on the coverage of the smoke sensor), and install the smoke sensor 0.5-2.5 meters above the important equipment. The smoke sensor in the corridor is installed every 15 meters.
What do the indicator lights on the smoke detector represent?
- Normal monitoring: The indicator light flashes once every 4 seconds after power-on.
- Alarm status: When smoke concentration exceeds the limit, the indicator light remains on, and a two-wire signal is output.
- Operating status: Pressing the test button or performing a smoke test will cause the indicator light to remain on, and a two-wire signal will be output to test whether the device is functioning properly.
- Pollution alert: When the smoke detector is contaminated, the yellow light flashes once every 4 seconds.
How to clean smoke detector?
The smoke alarm should be cleaned every 3 years, and the cleaning should be done by professional technicians. Usually, you can wipe the shell with a soft cloth.
How does a fire alarm work?
Renke smoke alarm adopts photoelectric smoke sensing principle design, built-in smoke sensor, and photoelectric smoke device. Smoke moves upwards. When it rises to the bottom of the ceiling and enters the inside of the alarm, the smoke particles will scatter part of the light beam to the photosensitive element. The denser the smoke, the more light is scattered on the photosensitive element. When the light beam scattered on the sensor reaches a certain level, the buzzer will sound an alarm. At the same time, the sensor converts the light signal into an electric signal and transmits it to the automatic fire alarm system to prompt a fire.
How to install smoke detector?
If installing on a ceiling, the smoke detector should be located near the center of the ceiling. For sloping or irregular ceilings, the detector must be installed at a certain distance from the ceiling surface. When the tilt angle is less than 30°, a distance of approximately 0.2 meters is recommended; when the tilt angle is greater than 30°, the recommended distance should be increased to 0.3-0.5 meters.
- Secure the base: First, secure the mounting bracket to the designated location on the ceiling using the provided screws and expansion tubes.
- Connect the wiring: Connect the power cord and signal wire to the corresponding terminals on the bracket according to the wiring instructions and tighten.
- Install the main body: Align the bottom of the smoke detector (with the dust cover) with the base’s locking slot and rotate clockwise until you hear a “click,” indicating a secure installation.
Our smoke detectors are only suitable for supervised areas and are not suitable for the following environments:
1. Do not install smoke detectors in areas with strong air convection.
2. Do not install the smoke detector too close to a corner of a wall, and avoid installing it in direct sunlight.
3. To ensure the product’s detection sensitivity and lifespan, clean the detector’s dust filter with a soft brush every 6 months. Turn off the power before cleaning.
4. The smoke detector should undergo a functional test monthly, such as manually pressing the “test button” to activate the alarm or performing a smoke blowing test.
How to wire a smoke detector?
Our smoke detector has terminals on the bottom. Please wire according to the following instructions:
- V+: Positive power supply (10~24V DC)
- V-: Negative power supply (10~24V DC)
- COM: COM output terminal
- NO: NO output terminal
When the device alarms, the NO and COM signal terminals will output corresponding two-wire signals.
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