Fire Alarm Using Flame Sensor

Pre-Wired School Project & Demonstration Kit

See sensing, switching and alert systems come to life.

Turn an important fire-safety concept into a live, observable learning experience.

The Go Science Classroom Series Fire Alarm Using Flame Sensor brings a flame sensor, relay module and audible buzzer together in one complete pre-wired working model. During a supervised demonstration, students can watch the sensor respond to a flame, hear the relay switch and observe the buzzer produce an immediate alert.

Every part of the model contributes to a clear functional sequence:

Detect → Signal → Switch → Alert

The pre-wired system gives students a dependable working foundation from which they can observe the concept, run controlled tests, repeat the demonstration, record results, explain the role of each component and develop further ideas based on what they discover.

Designed for Grades 7–12, the model is suitable for school projects, science exhibitions, classroom demonstrations, practical electronics learning and fire-safety concept presentations

A Working Model Made for Exploration

Learning begins the moment the model is powered.

Connect a fresh 9V battery, follow the demonstration guide and observe how the complete electronic system responds. The model allows students to move naturally through the scientific process:

Predict. Test. Observe. Repeat. Explain. Explore further.

Students can investigate how the sensor reacts, identify the sequence of events, compare results under different conditions and connect each physical response to the electronic concept behind it.

The model provides an accessible way to explore:

• Flame sensing
• Infrared detection
• Electrical signals
• Relay-based switching
• Audible alert circuits
• Input and output systems
• Automatic response
• Circuit protection
• Observation and troubleshooting
• Sensor-based automation

What’s in this preassembled Kit?

These form the part of preassembled, pre wired kit.

• Flame sensor module
• 5V relay module
• 5V active buzzer
• Inline reverse-polarity protection diode
• House model with contextual base
• Wooden component-support block
• Pre-wired electrical connections
• Battery snap connector
• Digital instruction manual
• Demonstration guidance
• Safety instructions
• Troubleshooting support
• Observation and concept-learning activities

Power Requirement

Requires one fresh 9V battery.

Battery is not included.

Approximate Model Dimensions

16 cm × 11 cm × 6 cm

The contents, battery requirement and dimensions are documented in the supplied product manual.

Why Pre-Wired?

Begin with a proven working foundation.

The complete sensing and alert pathway is arranged in advance so that students can experience the system as one coordinated working model.

This makes it possible to focus directly on the heart of the learning experience:

Observe the System

Watch the sensor indicator respond, hear the relay activate and listen to the buzzer sound.

Follow the Signal

Trace the functional journey from flame detection to electrical signal, relay switching and audible output.

Run Tests

Repeat the demonstration under controlled conditions and observe how distance, direction, lighting and sensor positioning may influence the response.

Record Findings

Create an observation table, compare test results and describe the behaviour of the system.

Explain the Concept

Use the visible working sequence to confidently explain the project during a classroom presentation, science exhibition or viva.

Build Upon the Idea

Use the working model as a foundation for discussing additional indicators, sensor systems, automation concepts, robotics applications and future electronics projects.

The pre-wired design transforms the model into a ready-to-investigate learning platform—one that can be demonstrated, questioned, tested, understood and explored repeatedly.

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Watch the Complete System Respond

1. Detect

The flame sensor acts as the input.

When a small flame is introduced within the detection area during an adult-supervised test, the sensor responds to infrared radiation associated with the flame.

2. Signal

The sensor converts the detected condition into an electrical trigger signal.

This demonstrates how a sensor communicates information to another part of an electronic system.

3. Switch

The signal reaches the relay module.

The relay activates with a distinct mechanical click and changes the state of its internal switching contacts.

4. Alert

The relay completes the buzzer circuit.

The active buzzer produces a clear audible warning, representing the output of the system.

5. Reset

When the flame is extinguished and removed, the sensor returns to its normal state.

The relay releases and the buzzer stops automatically.

This complete response helps students understand how several electronic components work together to sense a condition and produce an action.

Explore the Role of the Relay

Hear electrical switching in action.

The relay introduces an important control stage between the flame sensor and the buzzer.

Rather than treating the project as a single response, students can observe it as a connected system with separate functional stages:

The relay’s indicator and mechanical clicking action give students a physical sign that switching has taken place.

Students can explore:

• How an electrical signal activates a relay
• How an electromagnetic switch operates
• The role of the relay coil
• Common, Normally Open and Normally Closed terminals
• How a Normally Open circuit becomes complete
• The difference between sensing and switching
• How one circuit stage can control another
• How automatic systems respond to changing inputs

A Real-World Context Students Can Understand

From individual components to one meaningful system.

The model places the electronics within a house-based fire-warning scenario, giving every component a clear purpose within the demonstration.

• The house creates the application context.
• The flame sensor represents the detection stage.
• The relay represents the automatic switching stage.
• The buzzer represents the warning output.
• The battery supplies electrical power.
• The protection diode introduces the concept of circuit safety.

This contextual arrangement makes it easier for students to connect electronic functions with a recognisable application.

They can explain not only the name of each component, but also:

• Why it is present
• What information it receives
• What action it performs
• How it interacts with the next stage
• How all the stages operate together

Test. Observe. Discover.

The model can support multiple supervised investigations.

Flame-Distance Test

Present the flame at different safe distances within the instructed range.

Observe whether the sensor responds consistently and record the results.

Detection-Angle Test

Keep the distance similar while changing the direction from which the flame is presented.

Observe how sensor alignment influences the response.

Response-Sequence Test

Follow the exact order of events:

1. Flame enters the sensor’s viewing area
2. Sensor indicator responds
3. Electrical trigger reaches the relay
4. Relay activates
5. Buzzer sounds
6. Flame is removed
7. Relay releases
8. Buzzer stops

Repeatability Test

Repeat the demonstration under similar conditions.

Compare whether the system produces the same sequence during each test.

Ambient-Light Observation

Observe the model under different indoor lighting conditions.

Discuss why an optical sensor may respond differently depending on the surrounding light environment.

Sensitivity Exploration

Under teacher guidance, observe how the sensor’s onboard sensitivity adjustment influences its detection behaviour.

Adjustments should be small, controlled and recorded.

Learn Through Every Test

Each demonstration can develop more than technical knowledge.

Students practise:

Observation

Noticing indicators, sounds, switching behaviour and changes in system state.

Prediction

Thinking about how the model may respond before carrying out a test.

Investigation

Changing one test condition while keeping other conditions controlled.

Recording

Documenting distances, conditions, responses and outcomes.

Comparison

Looking for differences and patterns between tests.

Reasoning

Explaining why a particular response may have occurred.

Troubleshooting

Checking the battery, sensor direction, surrounding light, flame distance and visible connections when the result changes.

Communication

Presenting the complete concept clearly to teachers, classmates and exhibition visitors.

Extension

Using the original model to develop new questions and further project ideas.

Reverse-Polarity Protection

Explore how a diode helps protect a circuit.

The model includes an inline protection diode within its pre-wired power connection.

A diode allows electrical current to flow primarily in one direction. In this model, it helps block reverse current if the battery connector is accidentally attached with incorrect polarity.

This introduces students to:

• Positive and negative polarity
• Direction of current flow
• Basic diode behaviour
• Reverse-polarity protection
• The importance of protecting electronic components
• How protection features are integrated into circuits

The protection diode is an additional safeguard. The battery should always be attached carefully and in the correct orientation.

Explore Key Concepts

The model supports learning across several connected topics:

Sensor Science

• Flame sensing
• Infrared radiation
• Optical detection
• Detection distance and angle
• Sensor sensitivity

Electrical Circuits

• Power supply
• Complete and open circuits
• Current pathways
• Input and output devices
• Electrical polarity

Switching and Control

• Relay activation
• Electromagnetic switching
• Normally Open contacts
• Signal-controlled outputs
• Automatic reset

Practical Investigation

• Controlled testing
• Repeatability
• Observation tables
• Cause-and-effect reasoning
• Troubleshooting

Systems Thinking

• Input
• Signal
• Control
• Output
• Protection
• Response

Built for Confident Demonstration

The model’s visual layout and clear response sequence make it suitable for:

• School science projects
• Science exhibitions
• Classroom demonstrations
• STEM learning activities
• Electronics concept sessions
• Flame-sensor demonstrations
• Relay-switching demonstrations
• Fire-safety awareness presentations
• Project report preparation
• Observation-based activities
• Practical assessment
• Oral presentations
• Viva preparation
• Grades 7–12

Students can demonstrate the system and explain the complete concept using the model in front of them.

Build Upon the Foundation

Once students understand the original sensing and alert sequence, the model can inspire further questions:

• Could a visual indicator be added?
• Could the system activate more than one output?
• Could another type of sensor be studied?
• Could the response be timed?
• Could an event be displayed or recorded?
• Could the concept connect to a microcontroller?
• Could the sensor input guide a robotic response?
• Could multiple sensors work together?
• How would smoke, heat and flame detection differ?
• How could a larger contextual model be developed?

These questions encourage students to move from observing an existing system to imagining how future systems may be designed.

Additional functions would require suitable components, technical knowledge and teacher guidance.

This Concept Can Also Be Used to Explore

The sensing, switching and alert sequence demonstrated by this model can support discussions around:

• Sensor-controlled warning systems
• Automatic flame-alert concepts
• Relay-operated buzzer circuits
• Smart-building monitoring concepts
• Home fire-safety awareness displays
• Laboratory monitoring concepts
• Industrial furnace warning concepts
• Server-room alert concepts
• Forest-fire early-warning concepts
• Firefighting robot input concepts
• Automatic hazard-notification concepts
• Infrared sensing applications
• Multi-stage control systems
• Sensor-based automation
• Input-process-output models

These are educational concept extensions based on the model’s working principle. They are not built-in real-world applications of the supplied product.

A Complete Learning Journey

See the concept.

Follow the signal.

Hear the switch.

Test the response.

Explain the system.

Build upon the idea.

The Go Science Fire Alarm Using Flame Sensor gives students a working foundation for exploring how electronic systems detect, decide and respond—turning an abstract circuit concept into something they can observe, investigate and confidently demonstrate.

Important Educational and Safety Information

This product is an educational demonstration model and science teaching aid.

• Adult or teacher supervision is required.
• Only an adult or teacher should handle the flame source.
• Use the model on a flat, dry and heat-resistant surface.
• Keep loose paper and flammable materials away.
• Maintain the recommended distance of approximately 5–8 cm.
• Never allow the flame to touch the sensor or model.
• Extinguish the flame immediately after observing the response.
• Keep each demonstration brief.
• Disconnect the battery immediately after testing.
• Store the model with the battery removed.

The model is not intended for use as a certified fire alarm, smoke detector, heat detector, building-protection system or life-safety device.

No Return/Exchange/refund