Tips for buying infrared thermometers

Wednesday, 09.03.2022

  • An Infrared Thermometer is used to measure the surface temperature of an object; without touching the surface of the object. In reality; The object to measure the surface temperature can be anything from rubber tires to furnace heaters. This versatility makes an Infrared Thermometer an extremely useful tool for inspection professionals in a variety of industries. However, to ensure accurate measurement results; Infrared Thermometer specifications must match the requirements of the application.
  • How do you determine which Infrared Thermometer is best for your application? The article below is intended to help you choose an Infrared Thermometer and make an informed purchasing decision.

Questions to ask when choosing to buy an infrared thermometer to measure infrared temperature:

  • What type of equipment does your application require (e.g. handheld or stationary infrared thermometers)?
  • What emissivity value is recommended to measure the surface temperature of your material?
  • What is the distance to target or distance to point (D/S) ratio your application requires?
  • How accurate is an infrared thermometer needed to complete your task?
  • What size of memory and data transfer interface are needed, if any?
  • What level of after-sales service and support is desired?
  • What is your budget for an infrared thermometer?

Purpose and how to use infrared thermometer:

  • The answer to this question largely depends on the intended application.
  • If you want to use Infrared Thermometer to collect measurement results readings for quality assurance; Handheld Infrared Thermometer should be used.
  • If you want to measure continuously and use the readings for process control; it will be better to use Fixed Infrared Thermometer. A Fixed Infrared Thermometer should be equipped with an interface; to transfer the resulting readings to a process control system or controller. The transfer can be analog directly connected or digital.


Buy infrared thermometers

  • An Infrared Thermometer needs to know the required emissivity. Emissivity of a material is the relative ability of its surface to emit or absorb energy by radiation. Emissivity depends not only on the type of material; but also depends on the predicted surface temperature and wavelength (Variable) of the Infrared Thermometer.
  • Another disadvantage is that the emission of metals varies greatly; making precise measurement difficult. For example, at 25°C (77°F) highly oxidized copper has an emissivity of 0.78; but at 527°C (980.6°F). . .
  • Emissivity Values for Infrared Thermometers Warning: The accuracy of the values shown in the table cannot be guaranteed; because emissivity depends on several variables (surface texture, color, temperature at the time of measurement, etc.).
  • While most glass, ceramic, plastic, wood and organic materials have very high emissivity (about 0.95); in the medium infrared (MIR) and far infrared (FIR) ranges. Empty metals have much lower emissivity in the MIR and near infrared (NIR).
  • Many Infrared Thermometers have a feature to adjust emissivity. Usually the emissivity is adjusted by a knob with a range of 0 … 1. Some infrared thermometers have an additional measurement input for the contact temperature sensor (or thermocouple).

Distance to target ratio:

Buy infrared thermometer

  • Each Infrared Thermometer has a lens with a distance-to-target ratio; or distance to certain (D/S) point.
  • Specifications like 2:1, 10:1 or 20:1 are very common for cheap IR Thermometer devices. When looking at high quality Infrared Thermometer devices; specifications can go up to 75:1. These values can also be expressed as x:y. This means that the measuring point has a diameter y when the distance to a surface is x.
  • For example, if the Infrared Thermometer has a distance-to-target ratio of 20:1; you can stand 20 cm or 20 inches from your target and measure the temperature of the circle one centimeter or one inch. This is similar to the cone of light emitted by a flashlight. If you approach a very close wall with a flashlight; the light cone will be smaller than when you are further away from the wall.


  • Each Infrared Thermometer will have its own exact specifications that depend on the temperature range being measured. Usually, a higher precision measuring instrument will come with a higher price tag; so it is important to consider practicality as well as accuracy.
  • In addition to emissivity, influencing factors such as surface thickness, geometry (even, concave, convex), finish (polished, rough, oxidized, sandblasted) and transmittance (thin plastic film) can affect the results; such as measuring angle and spectral range. Therefore, when making comparative temperature measurements with an Infrared Thermometer; it is important to set up a control to minimize the effects of as many variables as possible to obtain the most accurate readings.

Buy infrared thermometer

Data transfer and memory:

  • Some thermometer products store temperature readings in internal memory or SD card memory.
  • The size of the memory can be expressed in terms of GB; or the maximum number of reads stored.
  • Memory usually allows temperature measurement data to be downloaded to a PC using a USB port; RS-232 interface or SD card reader.
  • In most cases, an IR Thermometer capable of recording temperature data is equipped with a USB connection. In some cases, special PC software is required to transfer measurement data.

Service and support:

  • This is another important point to keep in mind. Find out how long the supplier has been in business and manufacturing. The longer the company’s history, the more likely you are to order spare parts several years after purchasing the Infrared Thermometer.
  • GMGA MEASURING is a unit specialized in providing temperature measuring devices for many years; products of famous brands with a history of sustainable development.
  • Besides; find out what kind of technical support will be available to you for your Infrared Thermometer. Call GMGA(+84) 0845 969 336; talk to the tech support team before buying; and experience for yourself the level of service provided.



  • Usually more related to budget than cost of Infrared Thermometer.
  • Calibration costs are common costs that can occur when using an Infrared Thermometer. For example, if you need to meet the requirements of an ISO quality standard; normal calibration intervals should be observed. ISO calibration costs may occur at the time of purchase; and reintroduce on an annual or even semiannual basis; depending on your exact needs and use of the Infrared Thermometer
  • It is also possible that recalibration becomes necessary later; Because Drift Infrared Thermometers and their sensors can experience problems over time. Items like batteries (rechargeable) should also be included in your calculations.

Choose a PRESTIGE – HIGH TECHNICAL company, provide technical consulting services and provide genuine and cheap quality infrared thermometers / thermometers

Buy genuine and cheap infrared thermometer at GMGA MEASURING:

  • With many years of experience in the field of providing measurement equipment in general and infrared thermometers in particular. GMGA MEASURING AND ANALYSING EQUIPMENT JOINT STOCK COMPANY is proud to be the most PRESTIGE and TECHNICAL unit in the field of supplying and consulting infrared thermometer equipment.
  • Come to GMGA MEASURING; Customers will advise themselves on techniques, choose the most suitable and satisfactory product in terms of quality, form as well as price.
    • GMGA is committed to providing the most dedicated infrared thermometer technical advice.
    • GMGA is committed to providing quality infrared thermometers – genuine, and the cheapest price in Vietnam market.
    • GMGA is committed to the best after-sales service, warranty service lasts from 1 to 3 years, accompanies customers in the process of using the product.
  • You can refer directly:

***GMGA equipment provided at:

***Instrumentation at:

***Infrared thermometer at:

***Infrared thermometer videos are available at: Gmga Measuring Youtube.

  • For BUYING and TECHNICAL CONSULTATION please contact:


Address: No. 10, Alley 42/293 Thinh Liet Street, Thinh Liet Ward, Hoang Mai District, Hanoi City, Vietnam.

Hotline: 0845 969 336 _ Zalo_Whatsapp_24/7.



Thank you very much!

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