Haze Monitoring for Industrial Facilities Malaysia

Introduction

Haze monitoring for industrial facilities in Malaysia is an important part of workplace environmental management for factories, industrial parks, warehouses, data centres and engineering facilities.

During regional haze episodes, airborne fine particles may enter industrial buildings through ventilation systems, loading bays, doors and other openings. Outdoor employees may also experience increased particulate pollution while carrying out maintenance, inspection and logistics activities.

For HSE Safety Officers, facility managers and industrial employers, the challenge is to distinguish official regional haze conditions from local indoor air quality measurements.

A suitable PM2.5 monitor can provide supplementary information about fine particulate concentrations in selected workplace locations.

Different monitoring applications may require additional parameters, including PM10, CO2, HCHO, TVOC, temperature and humidity.

This guide compares five Temtop models: M2000 2nd, LKC-1000S 2nd, P600, M10i and M10+.

It also explains practical monitoring procedures, workplace precautions, instrument limitations and the importance of Malaysia's DOSH 2026 haze guidance.

MTM Precision Sdn Bhd supplies Temtop air quality monitoring instruments for industrial and commercial customers throughout Malaysia.

Why Industrial Facilities Need Haze Monitoring

Industrial facilities contain different working environments, each with its own air quality considerations.

An administration office may have mechanical air conditioning and limited outdoor air infiltration.

A warehouse may have large loading bay doors that open frequently.

A factory production area may contain process-generated dust or other contaminants unrelated to regional haze.

A data centre may have tightly managed ventilation and filtration systems.

During haze episodes, outdoor PM2.5 concentrations can change, but indoor conditions depend on building design, ventilation, filtration, occupancy and local sources.

Indoor PM2.5 monitoring can help facility teams investigate whether fine particle concentrations are changing in specific rooms.

Portable monitoring may also support preliminary comparisons between different locations.

However, general-purpose instruments do not identify individual particle constituents or replace professional occupational exposure assessments.

An effective industrial monitoring plan must begin with the actual workplace hazards and measurement objectives.

Understanding PM2.5, PM10 and Industrial Dust

PM2.5 refers to airborne particles with aerodynamic diameters of 2.5 micrometres or smaller.

PM10 refers to particles with aerodynamic diameters of 10 micrometres or smaller, including the PM2.5 fraction.

Both are commonly reported in µg/m³.

Regional smoke haze is an important source of fine particulate pollution.

Industrial operations can also generate airborne particles through activities such as material handling, vehicle movement, cutting, grinding and combustion.

However, PM2.5 and PM10 readings cannot distinguish between haze particles and specific industrial dust types.

They also cannot quantify respirable crystalline silica, metal fumes or other hazardous substances without suitable specialised methods.

For general particulate screening, an instrument that measures both PM2.5 and PM10 may be useful.

For chemical-specific occupational exposure testing, employers should use the appropriate sampling and analytical methods.

Official Malaysia API vs Local Industrial PM2.5 Readings

Malaysia's Air Pollutant Index (API), also called IPU, is published by the Department of Environment (DOE) through its Air Pollutant Index Management System (APIMS).

Official API information describes ambient air pollution conditions according to Malaysia's applicable index methodology.

A portable Temtop monitor measures pollutant concentrations near the instrument.

For example, a PM2.5 reading of 85 µg/m³ does not mean that Malaysia's official API is 85.

Likewise, an official regional API value does not directly establish the PM2.5 concentration inside a particular factory office.

Some air quality monitors display their own AQI indication, which should not be confused with the official Malaysian API.

Industrial employers should use DOE APIMS for official haze information.

Portable monitors can supplement this information by showing local conditions at suitable monitoring points.

Do not convert an instantaneous PM2.5 reading directly into an official API value.

Malaysia DOSH 2026 Haze Guidelines for Industrial Employers

Malaysia's Department of Occupational Safety and Health (DOSH) has published updated Guidelines for the Protection of Employees Against the Effects of Haze at Workplaces in October 2026.

The guidance provides an official reference for protecting employees during haze conditions.

Industrial employers should consider:

• Official API conditions

• Outdoor work requirements

• Duration and intensity of physical activities

• Employees who may be more susceptible to haze

• Visibility-sensitive vehicle and lifting operations

• Appropriate respiratory protection

• Suitable indoor rest areas

• Ventilation and air cleaning arrangements

• Communication of workplace precautions

• Risk assessment and follow-up actions

The appropriate measures depend on the current guidance and the hazards associated with each activity.

For example, an outdoor maintenance task may require different precautions from administrative work inside a filtered office.

Employers should review the complete current DOSH document for applicable activity restrictions, thresholds and operational requirements.

A portable Temtop PM2.5 monitor cannot independently determine statutory stop-work requirements or establish compliance with DOSH guidance.

Temtop Air Quality Monitor Comparison for Industrial Facilities

Five Temtop models provide different combinations of measurements and monitoring functions.

Temtop M2000 2nd

Measures PM2.5, PM10, CO2, HCHO, temperature and relative humidity. Supports portable inspections and USB CSV data export.

Temtop LKC-1000S 2nd

Measures PM2.5, PM10, HCHO, TVOC, temperature and relative humidity. Supports USB data export. Does not measure CO2.

Temtop P600

Focuses on PM2.5 and PM10, with a 12-hour PM2.5 histogram. Suitable for focused portable particulate screening.

Temtop M10i

Measures PM2.5, HCHO and TVOC, with WiFi connectivity, compatible app functions and an instrument-generated AQI indication. Does not measure PM10 or CO2.

Temtop M10+

Measures PM2.5, CO2, TVOC, temperature and relative humidity, with compatible app connectivity. Does not measure PM10 or HCHO.

Model selection should be based on the required pollutants, location, operating environment and reporting needs.

Application 1 - Haze Monitoring in Manufacturing Factories

Manufacturing facilities often contain both enclosed offices and production areas.

During haze episodes, fine particles may enter occupied spaces through ventilation systems, open doors and nearby vehicle movement.

PM2.5 monitoring can help facility teams observe general particulate trends in suitable indoor locations.

For portable PM2.5 and PM10 inspections, the Temtop P600, M2000 2nd or LKC-1000S 2nd may be considered.

For an occupied factory office where CO2 is also relevant, the M10+ or M2000 2nd provides additional ventilation-related information.

The monitoring objective must remain clear.

General-purpose PM2.5 readings do not replace industrial hygiene testing for process dust, welding fumes or hazardous chemical exposure.

Where factory operations generate regulated contaminants, appropriate contaminant-specific assessment is necessary.

Application 2 - Industrial Parks and Multi-Building Facilities

Industrial parks may contain several buildings with different ventilation arrangements and operational activities.

A practical screening programme may compare:

• Administration buildings

• Security offices

• Training rooms

• Maintenance offices

• Warehouse administration areas

• Indoor staff rest areas

The M2000 2nd can support portable multi-parameter inspections across selected locations.

The P600 can be used where the principal requirement is PM2.5 and PM10 screening.

For a selected indoor room requiring connected PM2.5 observations, the M10i may be appropriate.

Comparisons should use similar measurement conditions, sufficient stabilisation time and documented locations.

A reading at one building should not be assumed to represent the entire industrial park.

Application 3 - Warehouse and Logistics Facility Air Quality

Warehouses and logistics facilities may experience changing particulate conditions because of loading bay operations, vehicle traffic and outdoor air infiltration.

During haze episodes, opening large doors can allow fine particles to enter occupied indoor areas.

Portable PM2.5 and PM10 monitoring may help identify general particulate trends near suitable work locations.

The Temtop P600 is a focused option for portable particle screening.

The M2000 2nd and LKC-1000S 2nd offer additional measurement parameters.

For warehouse administration offices, the M10+ can provide PM2.5 and CO2 measurements.

Monitoring should not interfere with vehicle movement or other safety-critical operations.

General particulate readings also cannot replace assessment of diesel exhaust, forklift emissions or other workplace-specific hazards.

Application 4 - Data Centre Indoor Air Quality Monitoring

Data centres rely on carefully managed cooling, ventilation and filtration systems.

During regional haze events, facility managers may wish to observe whether fine particulate concentrations change in selected occupied support areas.

The Temtop M10+ can provide PM2.5, CO2, temperature and relative humidity information in suitable indoor locations.

The M10i can provide WiFi-connected PM2.5 trend observations where its application and network requirements are supported.

The M2000 2nd may be used for short-duration portable PM2.5 and PM10 screening.

However, general-purpose Temtop instruments are not substitutes for specialised data centre contamination assessments.

Data centre specifications may require dedicated particle-counting methods, gas contamination evaluation or other environmental controls.

PM2.5 mass concentration is not interchangeable with airborne particle counts used in specialised cleanliness assessments.

Instrument placement must also comply with facility access, security and equipment safety procedures.

Application 5 - Factory Offices, Meeting Rooms and Control Rooms

Occupied indoor rooms may require more than particulate monitoring alone.

During haze, reducing outdoor air infiltration can sometimes lower indoor PM2.5.

However, rooms with limited ventilation and substantial occupancy may experience increasing CO2 concentrations.

The Temtop M10+ combines PM2.5 and CO2 measurements with TVOC, temperature and humidity.

The Temtop M2000 2nd combines PM2.5, PM10 and CO2 with HCHO measurement.

The Temtop M10i offers connected PM2.5 monitoring with HCHO and TVOC but does not measure CO2.

For facility managers, these distinctions are important.

A low PM2.5 reading does not automatically mean ventilation is adequate.

Similarly, a CO2 reading does not measure haze severity.

Particulate filtration, ventilation, occupancy and other indoor pollutants should be considered together.

Application 6 - Outdoor Industrial Maintenance and HSE Inspections

Industrial maintenance teams may work outdoors on pumps, cooling towers, utility systems, pipework, electrical installations and building equipment.

During regional haze episodes, employers should consider official API information, work intensity, visibility and the duration of outdoor exposure.

A portable Temtop M2000 2nd or P600 may be used for supplementary particulate observations at safe, sheltered locations within the instrument's operating limits.

The instruments should not be placed directly in rain, condensation or heavy dust clouds.

They should not distract employees from electrical hazards, moving machinery or traffic.

For occupational exposure to specific hazardous substances, appropriate professional methods are required.

Local PM2.5 monitoring is supplementary information, not a substitute for the workplace risk assessment.

How to Set Up an Industrial Haze Monitoring Programme

Step 1 - Define the purpose.

Decide whether the objective is general haze screening, indoor air quality observation, ventilation investigation or formal exposure testing.

Step 2 - Check official API information.

Review current DOE APIMS readings and the applicable DOSH guidance.

Step 3 - Identify representative locations.

Select suitable factory offices, warehouses, occupied support rooms or sheltered inspection points.

Step 4 - Choose the required parameters.

Determine whether PM2.5 alone is sufficient or whether PM10, CO2, HCHO or TVOC is needed.

Step 5 - Select the instrument.

Match the monitoring requirements to the correct Temtop model and its operating limitations.

Step 6 - Prepare the equipment.

Check power, sensor openings, environmental conditions and the manufacturer's operating instructions.

Step 7 - Allow readings to stabilise.

Avoid drawing conclusions from a single reading immediately after moving the instrument.

Step 8 - Record environmental conditions.

Note the date, location, work activities, occupancy, door position, ventilation and filtration arrangements.

Step 9 - Compare trends.

Use reasonably consistent measurement methods and repeated observations.

Step 10 - Review control measures.

Consider filtration, ventilation, housekeeping, outdoor work precautions and further professional assessment where necessary.

Step 11 - Document follow-up actions.

Maintain clear records of observations, decisions and unresolved concerns.

Air Purifier and HVAC Monitoring During Haze

Air purifiers and suitable HVAC filtration systems may help reduce indoor particulate concentrations.

Facility managers can use portable PM2.5 monitors to observe changes before and after filtration adjustments.

For example, an industrial office may record PM2.5 before operating an air purifier and compare readings after an appropriate period.

Important factors include:

• Room size

• Air purifier capacity

• Filter type and condition

• Air circulation

• Outdoor particle infiltration

• Occupancy

• Indoor emission sources

• Monitoring position

A reduction in local PM2.5 is useful screening information but does not establish certified filtration efficiency.

Air purifiers that recirculate air also do not necessarily introduce fresh outdoor air.

For occupied rooms, CO2-capable instruments such as the M2000 2nd or M10+ may provide additional ventilation-related information.

PM2.5 control and ventilation management should be evaluated together.

Industrial Monitoring Data - USB Export vs WiFi Trends

Different facilities have different data recording needs.

The Temtop M2000 2nd supports USB CSV data export for available recorded measurements.

The Temtop LKC-1000S 2nd also supports USB data export, subject to the exact supplied version.

The Temtop P600 provides a 12-hour PM2.5 histogram. Buyers should not assume that a histogram means downloadable continuous data logging.

The Temtop M10i provides compatible WiFi and app-based trend functions.

The Temtop M10+ provides compatible connected monitoring and application features.

Before purchasing, confirm:

• Required monitoring duration

• Recording interval

• Available memory

• Export format

• Network compatibility

• Software requirements

• Data access arrangements

General-purpose monitoring records are not automatically accredited environmental test reports or certified occupational exposure results.

Common Problems and Troubleshooting for Industrial PM2.5 Monitoring

Problem 1 - PM2.5 readings fluctuate rapidly.

Check nearby airflow, open doors, moving vehicles, humidity and stabilisation time.

Problem 2 - Two monitors show different readings.

Place them close together in a suitable location and compare readings over time. Review sensor accuracy and environmental conditions.

Problem 3 - PM2.5 remains high after filtration starts.

Check filter condition, equipment capacity, outdoor infiltration and indoor emission sources.

Problem 4 - CO2 increases while PM2.5 decreases.

Review occupancy and ventilation arrangements. Filtration and fresh-air ventilation serve different purposes.

Problem 5 - TVOC readings change unexpectedly.

Consider cleaning activities, furnishings, solvents and sensor interference. Use chemical-specific testing when necessary.

Problem 6 - WiFi monitoring becomes unavailable.

Check the supported network, app compatibility, power supply and connection setup.

Problem 7 - Readings are abnormal after storage.

Check power, sensor openings, operating conditions and the manufacturer's maintenance instructions.

Problem 8 - The facility needs a certified compliance report.

Confirm the applicable standard and engage a qualified testing provider where required.

Avoid cleaning optical sensor chambers with compressed air or inserting tools unless expressly permitted by the manufacturer.

Frequently Asked Questions About Industrial Haze Monitoring

Can Temtop monitors measure haze in Malaysian factories?

They can provide supplementary local particulate measurements in suitable environments.

Which models measure PM2.5 and PM10?

The M2000 2nd, LKC-1000S 2nd and P600.

Which models measure CO2?

The M2000 2nd and M10+.

Which models measure TVOC?

The LKC-1000S 2nd, M10i and M10+.

Which models measure HCHO?

The M2000 2nd, LKC-1000S 2nd and M10i.

Which model is suitable for a factory office?

Choose according to the required parameters. M10+ is relevant when PM2.5 and CO2 are needed; M10i is relevant when PM2.5 and WiFi-connected HCHO/TVOC monitoring are required.

Can a P600 monitor PM10?

Yes. It measures PM2.5 and PM10.

Can a Temtop monitor provide Malaysia's official API?

No. Official API information is published by DOE APIMS.

Can these monitors be used for respirable crystalline silica testing?

No. Specialised occupational sampling and laboratory analysis are required.

Are these instruments suitable for permanent outdoor industrial monitoring?

They should not be treated as weatherproof permanent monitoring stations.

Can a portable PM2.5 reading determine when outdoor industrial work must stop?

No. Employers must refer to official API information, current DOSH guidance and workplace risk assessment.

Can WiFi monitoring replace professional air quality testing?

No. Connectivity improves access to readings but does not establish regulatory-grade measurement capability.

How to Choose the Right Temtop Monitor for Your Facility

Choose Temtop M2000 2nd when you need portable PM2.5, PM10 and CO2 monitoring with HCHO and USB CSV data export.

Choose Temtop LKC-1000S 2nd when you need PM2.5 and PM10 together with HCHO and TVOC screening.

Choose Temtop P600 when you primarily need portable PM2.5 and PM10 observations.

Choose Temtop M10i when you need WiFi-connected PM2.5 monitoring together with HCHO and TVOC in suitable indoor spaces.

Choose Temtop M10+ when you need indoor PM2.5, CO2 and TVOC monitoring with temperature, humidity and compatible app functions.

For industrial applications, confirm whether the intended use is general environmental screening or a formal occupational or regulatory assessment.

Where specific hazardous gases, industrial chemicals, silica dust or specialised data centre contaminants must be measured, other instruments and methods may be required.

Where to Buy Temtop Air Quality Monitors in Malaysia

MTM Precision Sdn Bhd supplies Temtop air quality monitoring instruments for manufacturing factories, industrial parks, warehouses, data centres, engineering companies, HSE departments and facility management teams.

Customers can enquire about:

• Temtop M2000 2nd

• Temtop LKC-1000S 2nd

• Temtop P600

• Temtop M10i

• Temtop M10+

We welcome enquiries from Kuala Lumpur, Selangor, Johor, Penang, Melaka, Negeri Sembilan, Perak, Pahang, Kedah, Kelantan, Terengganu, Perlis, Sabah and Sarawak.

For product selection assistance, send us your application, required parameters and monitoring environment through WhatsApp.

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

Contact MTM Precision Malaysia for haze monitoring, industrial PM2.5 measurement and Temtop air quality monitor selection assistance.

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