Benetech GM300 vs GM300E vs GM300H vs GM550 vs GM550E vs GM550H Infrared Thermometer Malaysia
Which Benetech Infrared Thermometer Should You Choose?
The Benetech GM300, GM300E, GM300H, GM550, GM550E and GM550H provide non-contact surface temperature measurement with different ranges and inspection functions.
The main differences are adjustable emissivity, temperature alarm settings, reading statistics, colour display and ring laser aiming.
For maintenance teams and buyers in Malaysia, choose according to the expected surface temperature and the controls needed during inspection.
Six-Model Comparison
ModelTemperature rangeEmissivityHigh/low alarm settingsMAX/MIN/DIF/AVGColour display and ring laserGM300−50 to 450°CFixed at 0.95NoNoNoGM300E−50 to 420°CAdjustable, 0.10–1.00YesYesNoGM300H−50 to 420°CAdjustable, 0.10–1.00YesYesYesGM550−50 to 550°CFixed at 0.95NoNoNoGM550E−50 to 550°CAdjustable, 0.10–1.00YesYesNoGM550H−50 to 550°CAdjustable, 0.10–1.00YesYesYes
GM300 has a higher listed upper temperature limit than GM300E and GM300H. The additional functions of the E and H versions do not mean a wider measurement range.
Features Shared by All Six Models
The supplied catalogue lists:
12:1 distance-to-spot ratio.
0.1°C or 0.1°F display resolution.
Reading hold and laser positioning.
Backlighting and low battery indication.
°C/°F conversion.
Automatic shutdown.
9V, 6F22 battery power.
The listed response time is 500 ms for 95% response.
GM300 and GM550: Basic Fixed-Emissivity Models
The GM300 and GM550 use fixed emissivity of 0.95.
They provide straightforward surface temperature readings without the additional alarm settings and reading statistics listed for the E and H versions.
Choose GM300 when the expected temperature falls within −50 to 450°C.
Choose GM550 when measurements may exceed 450°C but remain within its −50 to 550°C range.
Fixed emissivity is suitable only when the setting reasonably matches the target surface.
GM300E and GM550E: More Measurement Controls
The GM300E and GM550E add:
Adjustable emissivity from 0.10 to 1.00.
High and low temperature alarm settings.
Maximum, minimum, difference and average readings.
These functions help users inspect several surfaces, observe temperature variation and compare readings against selected limits.
The catalogue lists GM300E up to 420°C and GM550E up to 550°C. Select the range before comparing the extra functions.
GM300H and GM550H: Colour Display and Ring Laser
The GM300H and GM550H provide the additional controls of the E versions and add a colour display and ring laser.
These features may help users view readings and aim during repeated inspections.
However, ring laser aiming does not improve the stated measurement accuracy or replace the distance-to-spot specification. Keep the target larger than the measurement area and follow the instrument’s aiming instructions.
Choose GM300H for work within its −50 to 420°C range, or GM550H when the 550°C upper limit is required.
Why Adjustable Emissivity Matters
An infrared thermometer estimates surface temperature from emitted thermal radiation.
GM300E, GM300H, GM550E and GM550H allow the emissivity setting to be adjusted to suit the target surface.
This can be useful when inspecting different materials, but the correct setting depends on the actual surface condition. Shiny metal can reflect surrounding thermal radiation, making readings difficult to interpret even with adjustable emissivity.
For critical measurements on reflective surfaces, confirm a suitable measurement method or compare against an appropriate contact measurement.
Understanding the 12:1 Distance-to-Spot Ratio
All six models list a 12:1 distance-to-spot ratio.
As a nominal example, a measurement distance of 120 cm corresponds to a spot approximately 10 cm across. Check the manufacturer’s spot-size guidance for the actual working distance.
If the target is smaller than the spot, the instrument may include surrounding surfaces in the reading. Move closer where practical.
Aiming lasers guide positioning; they do not mean the instrument measures only a laser dot or line.
Accuracy and Display Resolution
The catalogue lists:
Above 0°C: ±1.5°C or ±1.5% of the reading, whichever is greater.
Below 0°C: ±3°C.
The 0.1°C display resolution describes the displayed increment, rather than the measurement accuracy.
The same accuracy specification is listed across the six models. Additional functions and a colour display should not be interpreted as higher accuracy.
Practical Buying Guide
Choose GM300 or GM550 for basic readings where fixed emissivity suits the surface.
Choose GM300E or GM550E when adjustable emissivity, temperature limits and reading statistics are useful.
Choose GM300H or GM550H when those functions are needed together with a colour display and ring laser.
For every model, confirm the expected temperature, target size, surface material and measurement distance. These instruments measure surface temperature, rather than internal component temperature.
Benetech Infrared Thermometer Enquiries in Malaysia
For customers in Selangor, Kuala Lumpur, Johor and Penang, contact MTM Precision Sdn Bhd for Benetech infrared thermometer enquiries.
Send a photo of the target and tell us the expected temperature range, surface material and working distance. We can help review the suitable model and provide a quotation.
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
09 Oct 2026
