3MK-5120D Natural Gas Detector / Domestic Gas Alarm
Domestic Gas Detection for Safer Homes and Facilities
The 3MK-5120D Natural Gas Detector is a household gas alarm device designed to detect multiple combustible gases, including methane, butane, LPG and propane. It provides fast audible warning and relay outputs for automation, helping users take precautionary measures immediately when a leakage reaches the defined threshold.
Designed & Manufactured in Turkey
The 3MK-5120D has been fully designed and manufactured in Turkey. It can operate as a standalone domestic gas alarm, and it can also work as part of a security surveillance or fire alarm system via its NO/NC relay contact output.
Clear LED Status Indication
The Green LED indicates power status, the Red LED indicates gas leakage condition, and the Yellow LED indicates a fault condition — enabling quick status recognition at a glance.
Key Features
FAULT / POWER / ALARM State LED Indicators
Easy-to-read status LEDs provide instant operational feedback.
Compatible With Fire & Intrusion Alarm Panels
Relay outputs enable convenient integration into alarm panels and security systems.
NO / NC Relay Output for Solenoid Valve Control
Supports automated gas cut-off scenarios using voltage-free relay contacts.
85 dB Alarm Output
Loud inbuilt sounder delivers a clear warning in case of gas leakage.
Durable White Plastic Enclosure
Housed in a clean, robust enclosure suitable for domestic and light commercial use.
Fixed Mains Cord and Plug
Simple installation and operation for household environments.
Multiple Supply Voltage Options
12V DC / 24V DC / 220V AC mains supply voltage options (model-dependent).
EN 50194
Designed for domestic combustible gas detection applications.
How It Works
1- Continuous Gas Monitoring
The detector continuously samples the ambient air using semiconductor sensing technology to identify combustible gas presence.
2- Alarm Activation at Threshold
When gas density reaches the set value, the device triggers a loud alarm to alert users and activate connected safety actions.
3- System / Valve Control via Relay Output
With NO/NC relay contacts, the 3MK-5120D can be connected to intrusion or fire alarm systems and can also control a solenoid valve to cut off the gas supply during a leakage event.
Technical Advantages
-
Standalone or System-Integrated Operation
Works independently as a domestic gas alarm, or integrates into fire/intrusion alarm panels using NO/NC relay outputs. -
Solenoid Valve Cut-Off Capability
Enables automatic gas shut-off actions when leakage is detected (model-dependent wiring scenario). -
Fast Start-Up and Simple User Feedback
Quick warm-up period and clear LED indicators help users verify readiness and alarm conditions. -
Multi-Gas Combustible Detection
Detects several combustible gas types commonly found in domestic environments (including methane, butane, LPG, propane).
Technical Specifications
| Order Code & Description | 3MK-5120D - Natural Gas Detector |
|---|---|
| Type of Sensor | Semiconductor Sensing Technology |
| Relay Output | NO / NC Relay Contact |
| Solenoid Valve Output | 250 VA |
| Power Consumption | 3W |
| Gas Threshold | %10 5000 ppm (0-50% LEL) |
| Working Temperature | -20°C ~ 50°C |
| Humidity | 80% |
| Sounder | 85 dB Inbuilt Sounder |
| Sensor Lifetime | 5 Years |
| Start Up | 45 Seconds |
| Qty in Box | 40 pcs. |
| Unit Weight | 400 gr |
| Unit Dimensions | 85mm x 120mm x 46mm |
Schematic Diagrams
To Connect Vantilation Systems
To Connect Intrusion Alarm Systems
To Connect Fire Alarm Systems
