Technical Questions and Answers about Infrared Thermometers

(1) How to measure temperature?

To take a temperature measurement, simply point the instrument at the dot to be measured. Be sure to take the distance-to-size ratio and field of view into account. Important things to keep in mind when using an infrared thermometer are:

1. Only the surface temperature is measured. Infrared thermometers cannot measure internal temperature.

2. Do not measure temperature through glass. Glass does not reflect and transmit differently than other materials, thus affecting infrared temperature readings.

3. It is recommended not to use infrared thermometers to measure bright or polished metal surfaces (stainless steel, aluminum, etc.).

4. Pay attention to the environmental conditions. Steam, dust, smoke, etc. cover the lens and prevent accurate measurements.

5. Pay attention to the ambient temperature. If the thermometer encounters a sudden environmental temperature difference of more than 10 degrees, let the instrument adapt to the new ambient temperature for at least 20 minutes.

6. Different objects use different emissivity.

(2) What are the common applications?

Non-contact thermometers have many uses

Commonly used in: Predictive and preventive industrial maintenance: inspection of transformers, switchboards, connectors, switchgear, rotating equipment, furnaces, etc.

Automotive: Diagnose cylinder heads and heating or cooling systems.

Heating general and air conditioning systems/dampers: Monitor air stratification, supply/return dampers and furnace performance.

Food Service and Safety: Check storage, service and storage temperatures.

Process control and monitoring: Check the process temperature of steel, glass, plastic, cement, paper, food and beverage.

(3) What is the difference between non-contact infrared thermometers and traditional contact thermometers?

Compared with non-contact infrared temperature measurement and contact temperature measurement, it has the following characteristics:

Non-contact infrared temperature measurement:

1. Non-contact temperature measurement has no effect on objects

2. Detect the surface temperature of the object

3. Fast response, can measure objects in motion and transient temperature

4. Wide measurement range

5. High measurement accuracy and small resolution

6. Can measure temperature on small area

7. Can measure temperature on point, line and surface at the same time

8. It can measure absolute temperature and relative temperature       

Contact temperature measurement:

1. Contact temperature measurement has an influence on the temperature field of the measured object

2. Not suitable for measuring transient temperature

3. Not easy to detect moving objects

4. The measurement range is not wide enough, and consumables

5. Not suitable for measuring poisonous, high pressure and other dangerous occasions

(4) What is a non-contact infrared thermometer?

Answer: The non-contact infrared thermometer is composed of optical system, photoelectric Detector, signal amplifier, signal processing, display output and other parts. The optical system gathers the infrared radiation energy of the target in its field of view, and the infrared energy is focused on the photoDetector and converted into a corresponding electrical signal, and then through programs such as signal amplification\DA conversion\MCU\software compilation, the measured target is finally calculated temperature value.