How to Use Temtop S1-UP for Indoor PM2.5 and Haze Monitoring Malaysia

How to Use Temtop S1-UP for Indoor PM2.5 and Haze Monitoring Malaysia

Malaysia is experiencing haze.

The outdoor AQI has increased.

You close the windows.

Switch on the air conditioning.

Start the air purifier.

But what is actually happening inside your home or office?

Is indoor PM2.5 lower than outdoors?

Is haze still entering the room?

Is the air purifier reducing PM2.5?

The Temtop S1-UP provides a simple way to observe:

PM2.5

AQI

Temperature

Humidity

It is suitable for Malaysian users who want direct, on-screen air-quality readings without depending on a mobile App.

However, meaningful haze monitoring requires more than placing the instrument anywhere and looking at one number.

This guide explains how to use the Temtop S1-UP to monitor indoor PM2.5 during haze and how to avoid common measurement mistakes.

What Is PM2.5?

PM2.5 refers to fine airborne particles with a diameter of 2.5 micrometres or smaller.

Possible sources include:

Regional haze.

Traffic emissions.

Open burning.

Industrial activity.

Construction.

Cooking smoke.

Cigarette smoke.

Burning incense.

Dust-producing indoor activities.

Because the particles are small, they may remain suspended in the air and enter buildings through openings and leakage points.

The air inside a building should not automatically be assumed to be clean simply because the doors and windows are closed.

What Does the Temtop S1-UP Show?

The Temtop S1-UP displays:

PM2.5 concentration

AQI

Temperature

Relative humidity

This combination is useful for general home, office and classroom monitoring.

However, the S1-UP does not measure:

CO2

PM10

TVOC

Formaldehyde or HCHO

Carbon monoxide

Combustible gas

The S1-UP is therefore most suitable when the primary concern is PM2.5 and basic indoor environmental conditions.

Is Outdoor AQI the Same as Indoor PM2.5?

No.

An outdoor AQI reading normally represents conditions measured at an outdoor monitoring location.

Your indoor reading may be different because of:

Building design.

Distance from roads.

Floor level.

Open or closed windows.

Door-opening frequency.

Ventilation arrangement.

Air leakage.

Air purifier operation.

Indoor particle sources.

Room size.

The number displayed on a weather App cannot tell you the exact PM2.5 concentration inside your bedroom, office or classroom.

An indoor air-quality monitor helps you observe the specific room you are using.

Step 1: Select the Room to Monitor

Begin with the room where people spend the most time during haze.

Possible locations include:

Bedroom.

Living room.

Children’s room.

Home office.

Meeting room.

Classroom.

Clinic waiting area.

Retail shop.

Do not try to monitor the entire building from one location.

Different rooms may have different particle conditions.

For example, a room facing a busy road may behave differently from a room at the back of the building.

Step 2: Choose a Representative Position

Place the Temtop S1-UP in the occupied area of the room.

The position should represent the air people are generally exposed to.

Avoid placing the monitor:

Directly beside an open window.

Immediately beside an external door.

Directly under an air-conditioning outlet.

Beside an air purifier outlet.

Above a cooking stove.

Near a humidifier.

Beside a bathroom entrance.

In direct sunlight.

Near steam or water.

Next to hot electronic equipment.

These positions may expose the sensor to an extreme local condition rather than the overall room environment.

Why Should You Avoid the Air Purifier Outlet?

Air directly leaving the purifier may have a lower particle concentration than the rest of the room.

If the monitor is positioned immediately beside that outlet, the reading may make the overall room appear cleaner than it actually is.

For a room-level evaluation, choose a position away from the direct clean-air discharge.

Keep the monitor in a representative occupied zone.

Step 3: Allow the Reading to Stabilise

Do not move the instrument into a room and immediately treat the first number as the final result.

The monitor needs time to respond to the new environment.

After moving the S1-UP:

Place it in the selected position.

Avoid handling it unnecessarily.

Keep the main room conditions consistent.

Observe how the reading changes.

Wait for the reading to become reasonably stable before recording it.

The time required may vary because the room condition itself may still be changing.

Step 4: Record the Initial Condition

Before changing anything, record the initial condition.

Useful information includes:

Time.

PM2.5.

AQI.

Temperature.

Humidity.

Window condition.

Door condition.

Air-conditioner status.

Air-purifier status.

Number of occupants.

Any cooking or cleaning activity.

Outdoor haze condition.

Without this information, it may be difficult to explain why the reading changed.

Example Initial Record

Time: 8:00 PM

Room: Main bedroom

PM2.5: Record displayed reading

Temperature: Record displayed reading

Humidity: Record displayed reading

Windows: Closed

Door: Open

Air conditioner: On

Air purifier: Off

Occupants: Two

This provides a baseline for comparison.

Step 5: Change One Main Condition

To understand what affects the PM2.5 reading, change one main condition at a time.

For example:

Switch on the air purifier.

Close the window.

Close the external door.

Stop cooking.

Move activity away from the room.

Do not change several conditions simultaneously if you want to understand the effect of one action.

If you close the windows, switch on the purifier, move the monitor and change rooms at the same time, you will not know which action caused the difference.

Step 6: Observe the Trend

One reading only tells you what the monitor detects at that moment.

A sequence of readings can show whether PM2.5 is:

Increasing.

Decreasing.

Remaining stable.

Changing when the door opens.

Changing when people enter.

Responding after the purifier starts.

Returning after outdoor air enters.

For haze monitoring, the direction of change is often more useful than a single isolated number.

Step 7: Compare Before and After Air Purifier Operation

The Temtop S1-UP can help users observe PM2.5 before and after operating an air purifier.

A simple procedure may include:

Record the initial PM2.5 reading.

Switch on the air purifier.

Keep the windows and external doors in the same condition.

Keep the monitor in the same position.

Avoid cooking, smoking or cleaning during the comparison.

Continue monitoring.

Record the reading at consistent intervals.

Observe whether PM2.5 decreases.

What Can Affect Air Purifier Results?

The result may be affected by:

Room size.

Purifier capacity.

Purifier speed.

Filter condition.

Monitor position.

Purifier position.

Open doors.

Open windows.

Air leakage.

Number of people entering and leaving.

Ongoing indoor particle sources.

A purifier may reduce PM2.5 in one room but struggle when the doors remain open or new polluted air continuously enters.

Does Air Conditioning Remove PM2.5?

Air conditioning and air purification should not automatically be treated as the same process.

An air conditioner mainly controls room temperature.

Depending on its design, filter and maintenance condition, it may influence particle circulation or filtration.

However:

A cool room does not automatically mean low PM2.5.

Use the S1-UP to observe the actual particle reading instead of assuming that switching on the air conditioner has solved the haze problem.

Does Closing the Windows Guarantee Clean Air?

No.

Closing the windows may help reduce the entry of outdoor particles, but PM2.5 may still be present because of:

Particles already inside the room.

Air leakage.

Door-opening activity.

Cooking.

Smoking.

Burning incense.

Cleaning.

Poor filtration.

Particles entering from another part of the building.

Closing windows is one action.

Monitoring helps you observe whether it is sufficient for the actual room.

Can PM2.5 Increase After Opening the Door?

Yes.

If the outdoor or corridor air has a higher particle concentration, opening the door may allow particles to enter.

The size of the change depends on:

How long the door remains open.

The difference between indoor and outdoor conditions.

Air movement.

Building pressure.

Nearby activity.

Room volume.

Repeated door opening can affect shops, offices, clinics and classrooms during haze.

Using S1-UP in a Bedroom During Haze

A bedroom is one of the most important areas to monitor because occupants may spend six to eight hours inside it.

A practical monitoring procedure may include:

Check PM2.5 before entering the room.

Close the external window.

Switch on the air conditioner if required.

Operate the air purifier.

Keep the monitor away from direct airflow.

Record the reading before sleeping.

Check the reading again after a suitable monitoring period.

Observe the reading in the morning.

Also record temperature and humidity.

Can S1-UP Check Bedroom Ventilation?

Not directly.

The S1-UP does not measure CO2.

People continue producing CO2 while sleeping.

A tightly closed room may have decreasing PM2.5 after filtration while CO2 increases because of occupancy.

There is no contradiction.

PM2.5 describes particle conditions.

CO2 can provide information relevant to occupancy and ventilation awareness.

If both issues are important, consider using an instrument that includes CO2 measurement.

Using S1-UP in a Living Room During Haze

Living-room conditions may change throughout the day.

Possible influences include:

Opening the main door.

Cooking.

Cleaning.

Guests entering.

Children moving between indoor and outdoor areas.

Operating fans.

Opening windows.

Burning incense.

The S1-UP can help identify when PM2.5 changes.

Record the room activity together with the displayed reading.

For example:

PM2.5 before cooking.

PM2.5 during cooking.

PM2.5 after cooking.

PM2.5 after operating the purifier.

This makes the information more useful than a number without context.

Using S1-UP in an Office During Haze

An office may contain several different environments:

Reception.

Open office.

Manager room.

Meeting room.

Training room.

Pantry.

Storage area.

One monitor can initially be moved between these locations for general screening.

Keep the procedure reasonably consistent.

Record:

Room name.

Time.

PM2.5.

Temperature.

Humidity.

Occupancy.

Door and window conditions.

Air-conditioning status.

Purifier status.

This can help facility teams identify which areas deserve longer monitoring.

Using S1-UP in a Classroom During Haze

Classrooms may be affected by outdoor haze when:

Windows remain open.

Doors open frequently.

Students enter from outdoors.

The school is near a busy road.

The building is near construction.

The Temtop S1-UP can help show the current classroom PM2.5, temperature and humidity.

However, classroom monitoring may also require CO2 information because of the number of occupants.

The S1-UP should not be treated as a complete classroom indoor-air-quality assessment.

It is a practical instrument for general PM2.5 monitoring.

Using ECO Mode During Haze

The Temtop S1-UP provides an ECO Mode for longer battery endurance.

According to Temtop, standby duration may reach approximately 60 days, depending on use and battery condition.

ECO Mode may be suitable for:

Longer general observation.

Leaving the monitor in one room.

Reducing charging frequency.

Watching broad environmental changes.

However, consider the monitoring objective.

For more immediate observation of changing conditions, A Mode may be more appropriate.

Using A Mode for Active Checking

The S1-UP also provides A Mode.

According to Temtop, standby duration in A Mode may reach approximately 20 days, depending on use and battery condition.

A Mode is useful when observing changes after:

Starting an air purifier.

Closing a window.

Opening an external door.

Cooking.

Cleaning.

Moving the monitor into another room.

Choose the operating mode according to whether you prioritise:

Longer battery endurance

or:

More immediate monitoring

Why Do PM2.5 Readings Change Constantly?

PM2.5 is not necessarily constant.

The displayed value may change because:

Particles are entering the room.

Particles are being filtered.

Air is mixing.

People are moving.

Doors are opening.

Cooking has started or stopped.

Cleaning has disturbed dust.

The monitor has been moved.

Nearby airflow has changed.

A changing reading does not automatically mean the monitor is faulty.

First check whether the surrounding environment is also changing.

Why Are Two PM2.5 Monitors Showing Different Numbers?

Two instruments may not display exactly the same number because of:

Different sensor designs.

Different sampling methods.

Different response behaviour.

Different operating modes.

Different calibration conditions.

Different positions.

Small local variations in the air.

To make a more useful comparison:

Place the instruments close together.

Keep them away from direct airflow.

Allow both readings to stabilise.

Use the same operating conditions.

Observe the overall trend rather than only one momentary difference.

Do not compare one monitor beside a purifier with another monitor near an open window.

Can You Compare Indoor and Outdoor PM2.5?

You can make a general comparison, but the procedure must be controlled carefully.

Moving a monitor between indoor and outdoor environments introduces several changes:

Location.

Temperature.

Humidity.

Air movement.

Particle concentration.

The instrument also requires time to respond after being moved.

Do not expose the S1-UP to rain, water or unsuitable outdoor conditions.

For normal users, the more practical question is often:

Is indoor PM2.5 improving after we close the room and operate the air purifier?

This can be answered through consistent indoor monitoring.

Common Haze-Monitoring Mistakes

Mistake 1: Placing the Monitor Beside the Purifier Outlet

This may show the condition of the cleaned outlet air rather than the overall room.

Mistake 2: Comparing Different Rooms Immediately

Allow the monitor time to respond after moving it.

Mistake 3: Recording Only One Number

Observe the trend and room conditions.

Mistake 4: Ignoring Cooking and Cleaning

Indoor activities can produce or disturb particles.

Mistake 5: Assuming Cool Air Is Clean Air

Temperature and PM2.5 are different measurements.

Mistake 6: Treating PM2.5 as CO2

The S1-UP does not measure ventilation-related CO2 changes.

Mistake 7: Expecting the S1-UP to Measure Formaldehyde

PM2.5 and formaldehyde are different pollutants.

Mistake 8: Changing Everything Simultaneously

Change one main condition at a time for clearer comparisons.

Temtop S1-UP or S1+ for Haze?

Choose the S1-UP when you want:

Direct on-screen PM2.5 readings.

Simple standalone monitoring.

No App requirement.

Portable room-to-room checking.

Choose the S1+ when you want:

Bluetooth App connectivity.

A smartphone-based monitoring approach.

Both models focus on PM2.5, AQI, temperature and humidity.

The main buying difference is whether App connectivity is required.

Temtop S1-UP or M10+ for Haze?

Choose the S1-UP when your main requirement is:

PM2.5 + AQI + temperature + humidity

Choose the M10+ when you also want broader monitoring that includes:

CO2

TVOC

The M10+ becomes more relevant when haze monitoring must be considered together with occupancy-related CO2 changes in a closed room.

The S1-UP is the simpler choice when PM2.5 is the main concern.

What S1-UP Cannot Tell You During Haze

The S1-UP cannot directly tell you:

Where the particles originated.

Whether the particles came from haze, traffic or cooking.

How much fresh-air ventilation the room receives.

The room’s CO2 concentration.

The room’s TVOC concentration.

Whether formaldehyde is present.

Whether the building meets formal IAQ requirements.

The monitor provides useful environmental readings, but those readings still require context and correct interpretation.

Temtop S1-UP Haze Monitoring Checklist

Before monitoring:

Select one room.

Choose a representative position.

Avoid direct purifier and air-conditioner airflow.

Select the appropriate operating mode.

During monitoring:

Record PM2.5 and AQI.

Record temperature and humidity.

Record doors, windows and occupancy.

Note cooking, cleaning or smoking.

Keep the monitor in the same position.

When comparing:

Change one main condition at a time.

Use consistent measurement periods.

Observe the trend.

Do not rely on one isolated number.

Temtop S1-UP Malaysia – Practical Haze Summary

The Temtop S1-UP is useful during Malaysian haze because it allows users to monitor the room they are actually occupying.

It can help answer:

Is PM2.5 entering the bedroom?

Does PM2.5 decrease after closing the windows?

Is the air purifier reducing particles?

Does PM2.5 increase when the main door opens?

Which room has the highest particle reading?

Its main measurements are:

PM2.5

AQI

Temperature

Humidity

For the most useful results:

Place the monitor correctly.

Allow readings to stabilise.

Record the room conditions.

Observe changes over time.

Change one major variable at a time.

Most importantly:

Outdoor AQI tells you about the wider outdoor area.

The Temtop S1-UP helps you observe the indoor room where you are spending your time.

Contact MTM Precision

Contact MTM Precision for Temtop S1-UP Malaysia price and quotation, or for assistance selecting an air-quality monitor for PM2.5, haze, bedrooms, offices, classrooms and air-purifier monitoring.

MTM Precision Sdn Bhd

Showroom & Service Centre:

No. 29-1 & 29-2, Jalan Bandar 18,

Pusat Bandar Puchong,

47160 Puchong, Selangor, Malaysia

Tel: 03-8080 7172

WhatsApp: +6016-660 7346

Email: mtmpre@yahoo.com

Website: www.mtmpre.com.my