Thermal Camera vs Temperature Data Logger for Data Centre Inspection Malaysia
Thermal Camera vs Temperature Data Logger for Data Centre Inspection Malaysia
Content
Thermal cameras and temperature data loggers are both useful for data-centre inspection, but they answer different questions.
A thermal camera shows the surface-temperature pattern across equipment at the time of inspection. A data logger records temperature at a selected location over hours, days or weeks.
A thermal image can quickly locate an abnormal hot area. A logger can show when the temperature changes and whether the problem is temporary or recurring.
For effective data-centre monitoring in Malaysia, the two instruments should be used together rather than treated as direct alternatives.
What Does a Thermal Camera Do?
A thermal camera detects infrared radiation emitted by a surface and converts it into a temperature image.
It allows technicians to compare many points without contacting each component individually.
Typical data-centre applications include:
Electrical panels
Circuit breakers
Cable connections
UPS systems
Battery connections
Server racks
Power distribution units
Cooling pumps
Fan motors
Air-conditioning equipment
The thermal image helps identify temperature patterns that may not be visible to the eye.
What Does a Temperature Data Logger Do?
A temperature data logger uses a sensor to record temperature automatically at defined intervals.
Depending on the model, it may also record:
Relative humidity
Dew point
Minimum and maximum values
Alarm events
Date and time
A logger is useful for identifying:
Temperature variation during the day
Short-duration excursions
Cooling changes after working hours
Differences between rack positions
Effects of changing IT load
Intermittent air-conditioning problems
Temperature changes during maintenance
It provides a time history rather than a single inspection image.
Main Differences
FeatureThermal CameraTemperature Data LoggerPrimary resultTemperature imageTime-based temperature recordMeasurement targetSurfaceAir or contact point, depending on sensorCoverageMany points during inspectionOne or several fixed locationsMonitoring durationSnapshotHours, days or weeksBest useLocating abnormal heatIdentifying when conditions changeElectrical inspectionVery usefulLimited unless attached appropriatelyRoom-air trendingLimitedVery usefulPermanent placementNormally noYesVisual evidenceStrongTrend graph or table
The instruments complement each other.
When to Use a Thermal Camera
Electrical Panel Inspection
Thermal imaging can help locate:
Hot cable terminals
Loose connections
Overheated breakers
Unbalanced phases
Abnormal busbar temperature
Overloaded components
A hot component does not automatically confirm the root cause. The technician should also check load, current balance, connection condition and equipment specification.
Electrical inspection must be conducted by competent personnel following the appropriate safety procedures.
UPS and Power Distribution
Thermal imaging may support inspection of:
UPS input and output connections
Static bypass
Distribution boards
Rack power distribution
Transformers
Battery terminals
Temperature differences between similar components under similar loads may justify further investigation.
Server Rack Screening
A thermal camera can quickly show:
Warmer rack sections
Uneven equipment loading
Possible airflow problems
Hot exhaust areas
Abnormal power components
However, the camera measures surface temperature. It does not directly replace rack-inlet air-temperature measurement.
Cooling Equipment
Thermal imaging can help inspect:
Pump motors
Bearings
Pipe temperature differences
Cooling coils
Fan motors
Heat exchangers
Insulation problems
Quantitative flow, pressure and air-temperature measurements may still be required.
When to Use a Temperature Data Logger
Rack-Inlet Monitoring
Rack-inlet temperature can vary according to:
IT load
Airflow
Rack position
Height
Containment
Cooling-unit operation
Loggers can be positioned at the lower, middle and upper rack inlet to identify vertical temperature differences.
After-Hours Monitoring
Some problems occur when:
Staffing is reduced
Doors remain closed
Air-conditioning schedules change
Backup systems operate
IT load changes
Maintenance occurs
A logger continues recording when no technician is present.
Intermittent Cooling Problems
An operator may report that a room becomes hot only at certain times.
A logger can show:
When the rise begins
How long it lasts
Maximum temperature
Whether the event repeats
Whether humidity changes at the same time
This information is more useful than arriving after the temperature has returned to normal.
Verifying Corrective Action
After changing:
Fan speed
Perforated floor tiles
Blanking panels
Temperature setpoints
Rack arrangement
Containment
Cooling-unit operation
Continue logging to confirm whether the change produced stable improvement.
Why a Thermal Camera Cannot Replace a Logger
A thermal camera only shows conditions during the inspection.
It may miss:
Overnight temperature excursions
Short cooling failures
Load-related changes
Weekend operating problems
Intermittent airflow loss
Humidity variation
Repeating thermal inspections manually can help, but it is not equivalent to continuous time-stamped recording.
Why a Logger Cannot Replace a Thermal Camera
A logger only records its selected location.
It may not detect:
A hot electrical terminal
An overheated breaker
A local UPS connection problem
A hot bearing
Temperature differences across an entire panel
A neighbouring rack hot spot
A logger may show that the room is normal while one electrical component is overheating.
Important Difference: Surface Temperature vs Air Temperature
Thermal cameras normally measure surface temperature.
Data-centre environmental requirements commonly focus on air temperature at relevant locations, such as the server inlet.
These values are not interchangeable.
A rack surface may be warmer or cooler than the surrounding air because of:
Internal heat generation
Material properties
Airflow
Reflection
Surface finish
Equipment load
Use an appropriate air-temperature sensor when the objective is environmental monitoring.
Understanding Emissivity
Thermal-camera accuracy depends partly on emissivity.
Materials with different surfaces emit infrared energy differently.
Potentially difficult surfaces include:
Polished metal
Reflective busbars
Shiny pipes
Aluminium panels
Stainless steel
A reflective surface may show the temperature of a nearby person or object rather than its true surface temperature.
For more reliable inspection:
Understand the target material
Adjust emissivity when appropriate
Avoid strong reflections
Compare similar surfaces
Use contact measurement for confirmation where safe
Record load conditions
A colourful thermal image does not automatically represent an accurate absolute temperature.
Selecting Logger Locations
Useful data-centre logger positions may include:
Rack inlet at lower height
Rack inlet at middle height
Rack inlet at upper height
End of cold aisle
Suspected hot spot
Room return-air area
Near a door
Near an outdoor-air entry point
Inside a network room
Near critical supporting equipment
Do not place the logger directly in front of a cooling outlet unless that supply-air temperature is the intended measurement.
Choosing the Logging Interval
A short interval records more detail but uses more memory and may complicate analysis.
A longer interval reduces data volume but may miss short events.
The interval should reflect:
Expected speed of temperature change
Monitoring duration
Memory capacity
Battery life
Risk of short excursions
Reporting requirement
For troubleshooting, a shorter interval may be appropriate. For long-term environmental observation, a longer interval may be sufficient.
Recommended Combined Inspection Method
Step 1: Review Existing Data
Check:
Temperature alarms
Cooling-system history
IT-load changes
Previous hot spots
Maintenance work
Step 2: Perform a Thermal Survey
Inspect:
Electrical distribution
UPS equipment
Rack areas
Cooling machinery
Pumps and fans
Step 3: Identify Locations for Logging
Place data loggers where:
Thermal patterns appear unusual
Occupants report intermittent problems
Rack-inlet temperature needs verification
Cooling performance varies
Environmental records are required
Step 4: Record Operating Conditions
Document:
IT load
Cooling-unit status
Doors and containment
Room layout
Date and time
Logger position
Thermal-camera settings
Electrical load
Step 5: Review Trends
Look for:
Repeating temperature peaks
Top-to-bottom rack differences
Temperature rise during high load
Overnight changes
Relationship with cooling equipment
Step 6: Confirm the Root Cause
Depending on the result, additional checks may include:
Airflow
Differential pressure
Electrical current
Power quality
Humidity
Cooling-water temperature
Pump vibration
Network equipment status
Common Inspection Mistakes
Using a Thermal Camera to Measure Room-Air Temperature
The camera measures surfaces, not air directly.
Positioning the Logger in Direct Cold Airflow
This may record the cooling-unit outlet rather than the temperature experienced by the rack.
Ignoring Equipment Load
Electrical and server temperatures should be interpreted together with load.
Comparing Different Surfaces Without Emissivity Consideration
Shiny metal and painted surfaces may produce different infrared behaviour.
Logging Only One Location
One sensor cannot represent a large data hall with different rack densities and airflow conditions.
Taking a Thermal Image Without a Normal Reference
Comparison with similar components or previous inspections makes anomalies easier to identify.
Which Instrument Should You Buy First?
Choose a thermal camera first when the primary need is:
Electrical preventive maintenance
Fast hot-spot detection
UPS and panel inspection
Cooling-equipment inspection
Visual troubleshooting
Choose data loggers first when the primary need is:
Continuous room monitoring
Rack-inlet temperature records
Intermittent problem investigation
Temperature and humidity trending
Verification after airflow changes
Facilities responsible for both electrical and environmental reliability will normally benefit from having both.
Data Centre Inspection Instruments from MTM Precision
MTM Precision supplies instruments for data-centre commissioning, inspection and preventive maintenance in Malaysia.
Relevant product categories include:
NOYAFA NF-522 thermal imaging camera
Wintact thermal imaging cameras
Temperature and humidity data loggers
Temperature and humidity meters
Differential-pressure meters
Airflow meters
Clamp meters and electrical testers
Vibration meters for pumps and fans
Network and cable testers
CCTV and network testers
The correct combination depends on whether the inspection objective involves electrical hot spots, environmental trending, airflow, cooling equipment or network infrastructure.
Contact MTM Precision
MTM Precision Sdn. Bhd. (744811-A)
Tel: 03-8080 7172
WhatsApp: +6016-660 7346
Email: mtmpre@yahoo.com / enquiry@mtmpre.com.my
Website: www.mtmpre.com.my
Visit our Puchong Showroom & Service Centre for thermal-camera and data-logger selection, product demonstration and technical support.
Operating hours: Monday to Friday, 9:00 AM–6:00 PM.
20 Sep 2026
