Benetech GM317A vs GM317B vs GM318A vs GM318B Infrared Thermometer Buying Guide Malaysia
Which Benetech Infrared Thermometer Should You Choose?
The Benetech GM317A, GM317B, GM318A and GM318B offer two temperature ranges and two levels of measurement control.
Within this series, A models measure up to 390°C, while B models measure up to 590°C. The GM318 models add adjustable emissivity, temperature alarms and reading statistics that are not listed for the GM317 models.
For buyers in Malaysia, select the required temperature range first, then decide which functions support the inspection task.
Four-Model Comparison
FeatureGM317AGM317BGM318AGM318BTemperature range−50 to 390°C−50 to 590°C−50 to 390°C−50 to 590°CEmissivityFixed at 0.95Fixed at 0.95Adjustable, 0.10–1.00Adjustable, 0.10–1.00Distance-to-spot ratio12:112:112:112:1Ambient temperature measurementYesYesYesYesReading holdYesYesYesYesMAX/MIN readingsNoNoYesYesAverage/difference readingsNoNoYesYesHigh/low temperature alarmNoNoYesYesZero offset adjustmentNoNoYesYesPower supply2 × AAA2 × AAA2 × AAA2 × AAA
The GM318 models have a default emissivity setting of 0.95, which can be adjusted.
GM317A vs GM317B: Choose the Temperature Range
The GM317A and GM317B provide fixed-emissivity operation for straightforward surface temperature checks.
Both list ambient temperature measurement, reading hold, °C/°F conversion and battery level indication.
Choose GM317A when the expected surface temperature remains within −50 to 390°C.
Choose GM317B when the application requires the higher 590°C upper limit.
The higher range does not establish better measurement accuracy.
GM318A vs GM318B: Additional Inspection Functions
The GM318A and GM318B add controls that can help when inspecting different surfaces or comparing several readings.
Their listed functions include:
Adjustable emissivity from 0.10 to 1.00.
Maximum and minimum readings.
Average and difference readings.
High and low temperature alarms.
Zero offset adjustment.
Choose GM318A for these functions within a 390°C upper range, or GM318B when the same functions are needed up to 590°C.
Fixed or Adjustable Emissivity?
GM317A and GM317B use fixed emissivity of 0.95. This simplifies operation when the setting suits the measured surface.
GM318A and GM318B allow the setting to be adjusted for the target material and surface condition.
The catalogue includes example emissivity values for different materials, but these should be treated as starting references. Surface finish, oxidation and coatings can affect the appropriate setting.
Adjustable emissivity does not automatically make shiny metal measurements reliable. Reflected thermal radiation can still influence the result.
When Are MAX/MIN and Alarm Functions Useful?
The GM318 models provide reading statistics for users who need more than one displayed temperature.
MAX/MIN readings help identify the highest and lowest readings during a measurement session. Average and difference functions provide additional ways to review temperature variation.
High/low alarms can help flag readings outside selected limits. Set these limits according to the application or equipment guidance.
A temperature alarm alone does not diagnose the cause of overheating.
Understanding the 12:1 Measurement Spot
All four models list a 12:1 distance-to-spot ratio.
As a nominal example, a distance of 120 cm corresponds to a measurement spot approximately 10 cm across. Follow the instrument’s spot-size guidance and keep the target larger than the measurement area.
If the spot includes surrounding objects, the displayed temperature may include their contribution.
The laser is an aiming aid, rather than the complete measurement area.
Accuracy and Operating Conditions
The catalogue lists:
Above 0°C: ±2% or ±2°C.
Below 0°C: ±3°C.
Response time: 500 ms for 95% response.
Instrument operating temperature: 0–40°C.
Operating humidity: 10–90% RH, non-condensing.
The table does not explicitly state how to apply the two above-zero accuracy terms. Confirm the current manual when numerical acceptance limits depend on this specification.
Target temperature range and instrument operating temperature are different. A model capable of measuring a hot surface must still be operated within its own environmental limits.
Zero Offset Adjustment Is Not a Calibration Certificate
The catalogue lists zero offset adjustment for GM318A and GM318B.
Use this function only according to the operating instructions and with an appropriate reference. It does not establish that an external calibration certificate is included.
All four instruments measure surface temperature. Ambient temperature measurement is a separate function, and a surface reading should not be interpreted as the internal temperature of a component.
Benetech Infrared Thermometer Enquiries in Malaysia
For buyers in Selangor, Kuala Lumpur, Johor and Penang, contact MTM Precision Sdn Bhd with the expected temperature range, surface material, target size and working distance.
Send a clear photo of the measurement target so 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
