EXTREME NON-CONTACT IR INFRARED DIGITAL THERMOMETER GUN

The Extreme, Duo-Sensor 4 in 1 Digital Infrared Thermometer Gun

Brief introduction:
This Super 4 in 1 Extreme Duo-Sensor Thermometer is one of the newest advanced models available and is a very handy device to have around the place.
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We take thermometers one step further with this device! This special thermometer has the benefits of both types of thermometers available in the market. It has BOTH a direct contact temperature thermocouple (TC) probe that can help measure the temperature of whatever it is inserted to, as well as a Non contact infrared (IR) long range temperature sensor.

The Infrared (IR) sensor is long 'unlimited^' range and contact free, allowing you to continuously measure surface temperatures of places you would not normally touch with your bare hands or with a thermometer, and you can do so from a long range. Having the contact free infrared option allows this thermometer to potentially save you a lot of time and hassle of repeated cleaning since you don't touch the surface you are measuring. The Infrared sensor works by measuring the heat waves (infrared wavelengths of light) that are being emitted by an object. Things that emit infrared waves affect this sensor (such as reflectivity and atmospheric dust between the sensor and the object being measured, even plain air to some extent.)
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The Thermocouple (TC) sensor is short range and often requires direct physical contact, it measures the temperature of the object it is in through the simple transfer of heat from the environment it is in, to the sensor within the probe (which detects temperature based on the Peltier–Seebeck effect). The temperature of its environment takes a few seconds to transfer to the probe, depending on its thermal conductivity (how fast temperature moves between surfaces). By relying on physical contact, this probe is not affected by transparency or reflection problems that affect the long range infrared sensor, which relies on infrared radiation

This High tech simple to use device gives you the power to measure a very wide range of temperatures unavailable to other standard thermometers and comes with a Laser sight for targeting and 2 Light Emitting Diodes which act as a flashlight.

Other IR thermometers on sale elsewhere may only measure up to around 75 or 100 Degrees Celsius. This device measures temperatures from a freezing -20 Degrees Celsius (-4˚ F) all the way to a scorching 320 Degrees Celsius (608˚ F). This device exists to measure extreme temperatures surfaces (see below for some examples). Why settle for any other thermometer?

General Item Description
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This device is compact and very easy to use.

This thermometer's non contact Infrared (IR) Sensor is a very cool device. You can discreetly and safely measure the surface temperatures of hot, hazardous, sensitive or hard to reach objects with almost no hassle. This IR sensor also has unlimted^ range because it is like a telescope that views the infrared spectrum in its circular cone of sight. It displays the average equivalent temperature that matches the infrared emission it detects within its cone of sight. For example, you can point it at far objects the sky, at clouds, the moon or the sun, although the readings will be distorted by the many tonnes of atmospheric air in between due to the extreme distances involved. Even air, clouds and ice emit a certain amount of radiation too! (although not very significant; they do make a difference at 'very' long distances). The accuracy of the IR sensor is affected by any form of matter that blocks, emits or distorts infrared radiation from the intended target within its line of sight.

This thermometer's K type Thermocouple (TC) sensor probe is also a very useful since it can measure the surface temperatures of hot, reflective, shiny, or liquid based objects with ease (including things that the other IR sensor cannot reach / read accurately).This TC sensor has a range as long as its cable, which is just over 1 metre long when fully extended.

Both the IR and TC sensors will give you a temperature read out in under a second. They have a 0.1 degree resolution and displays readings that can be as little as 0.1 degrees apart.

This device uses one 9 Volt Battery (Standard or Rechargeable) to operate, and comes calibrated with a safer class 2 , 630nm-670nm built in red laser to help you aim, along with a large LCD display and a bright backlight to facilitate easy viewing at night or from various angles.

This device supports both the Fahrenheit and Celsius Temperature display system. You can switch between both systems to suit your preferences.

At the touch of a button, you can switch the temperature sensor input (IR / TC) , Temperature System (C / F) as well as enable or disable the laser, LED flashlight and backlight features.

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Applications Notes for the IR thermometer
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Related News in 2006: National Nine News: "A Current Affair discovers many foods being sold in city lunch bars may be rife with potentially fatal bacteria". Using digital thermometers, a huge amount of food retailers were found to breach laws of food storage temperatures, putting you at risk of food poisoning.

For more information on this subject, click here to view the free public video on ninemsn while it exists.

This thermometer may effectively help you analyse the surface temperature of food to be served to you. And hopefully, it will help reduce the chances of you getting poisoned from bacteria in food stored at temperatures that allows significant bacterial growth.

Cold food should be stored under 5 degrees prior to serving and Hot food should be stored above 60 degrees prior to serving. This is said to be law.

Unlike the Thermocouple sensor (TC) which measures by contact, the Infrared sensor (IR) on this device measures surface temperature only. It does not see through the surface. This also applies to transparent surfaces such as plastic, glass or water. Measuring a transparent surface will result in the temperature of the transparent surface being displayed. One solution is to use the Thermocouple sensor instead or wait till the internal temperature matches the surface temperature of the transparent surface or vice versa.

This device is not recommended for applications requiring extreme precision, such as taking human temperatures, even if it may be quite accurate at doing so.

Human / Medical Usage and Extreme Precision ?

We often get asked if this device can be used to take human body temperature, or if it can be used in medical environments like hospitals and clinics.

Based on practical experience, we can say that using the device for 'Relative Difference Readings' can provide extremely accurate readings in the difference in temperature between two objects. (eg; comparing the 'Difference in temperature' between two people's skin temperature), however both measurements must occur within a few seconds of each other in identical stable environments.

For example, you may be able to use this thermometer to show that Mr John Smith is 2 degrees warmer than Mrs Jane Smith with significant accuracy; however, the numerical temperature readings displayed (eg; 37, 38.5 degrees etc) are not accurate enough for human body temperatures, which generally need to be extremely accurate to within less than half a degree; and as such, the numerical results from this IR Thermometer (when used by itself) are not precise enough to support any kind of diagnosis or medical usage. You will need a highly accurate comparison to perform real time mathematical calibration.

Conclusion: The manufacturer does not recommend it for human and medical purposes, so neither do we. You should not use it for human or medical use even though it can be very accurate; (someone might accidentally mistake it for a medical thermometer).

How do i use it?
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Using the thermometer it is simple. To use the Infrared sensor (the device's default temperature sensor): Install a 9V battery with a good amount of charge remaining, and aim the IR Thermometer at a surface to measure, and press and hold down the trigger. The device will turn on automatically, and in less than 1 second, you will get a temperature reading displayed on the LCD screen. The temperature reading will update itself every half a second as long as you hold down the trigger.

Let go of the trigger and the thermometer will beep and the last reading will be displayed on the LCD screen for around 10 seconds. The device will turn itself off automatically if no button is pressed within those 10 seconds.

At anytime while the device is on, you can press the backlight button or laser button to disable or enable the backlight, flashlight or laser pointer feature as required.

To use the Thermocouple probe, plug the thermocouple cable into the thermometer gun. To do this, make sure you align the plug correctly. The Plus sign (+) on the cable plug must be on the same side as the (+) sign on the thermometer. The same thing applies for the Minus sign (-). If you don't do this, you may get an incorrect reading or you may damage the thermometer.


Once your probe is connected, push the trigger, wait 1 second and press the NTC button. This switches to the Thermocouple mode from the Infrared sensing mode. The LCD screen will display 'NTC' which is the sensor it is currently displaying readings from. Press the tip of the probe against the object whose temperature you want measured, wait a few seconds for the heat to transfer to the sensor probe's tip, and press the trigger. The tempearture displayed would be the approximate temperature of the probe's tip at that moment, which would be nearly identical to the object it is touching if you held it close enough for long enough.
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Some additional info for more accurate measurements: Take into account the fact that the IR Sensor measures and displays the average temperature reading of the surface objects within a circular spot in front of it (around the point marked by the laser). The size of this circular spot increases in diameter by 1cm for every 12cm in distance the IR Thermometer is at from the surface being measured (view diagram below). If you have two different temperature objects within this spot, you may probably get a reading near the average of both temperatures. The closer you are, and the less varied the surface temperature, the more accurate the reading will be. Objects within the circular spot, but hidden from the IR Thermometer's line of sight will generally not be included in the measurement.

Also watch for 'Thermal Shock': Thermal shock occurs when there are large or sudden temperature changes in the ambient temperature which will affect the thermometer's performance, and in cold situations may cause condensation (water droplets) to form on the lens and make the reading inaccurate by blocking the infrared light from reaching the sensor, or causing an abnormally high reading in hotter conditions due to radiation emitted from the walls of the gun after being warmed /cooled by 'cold / hot air'. Let it rest for 30 mins in the environment of stable temperature that you will be using it in before use for best results. This allows the internal temperature of the device to equalize, so that the thermometer's 'relative temperature sensor' can properly calibrate the readings in real time. For example, if the internal temperature of the gun is uneven (for example, hotter at the front sensor side, and cooler on the inside and the back), the sensor may detect that the temperature is alot higher than normal . So make sure you let the temperature of the thermometer gun 'normalise' or equalise with the ambient environment first or you may get an abnormally high reading following a period of sudden temperature change heat exposure. As physical example; don't put the thermometer directly above a barbecue as the hot air will affect the reading accuracy very quickily, and the gun will remain inaccurate till it's internal temperature matches the external temperature. Fortunately, normal body heat from hands don't really affect it significantly.

Actual measurements are also influenced by a great many factors, including environmental conditions, reflectivity of surfaces(read below), external interference, radiation, heat and battery power available. According to the manufacturer, these influences are usually small and the temperature reading is generally accurate within "2 Degrees Celsius +2% margin of error" for temperature measurements between 0 to 100 Degrees Celsius. This margin of error increases at temperatures below 0 Degrees Celsius and over 100 degrees Celsius.

Reflective Surfaces and shiny metal or polished surfaces can give inaccurate readings (see image below). The solution is to measure an appropriate surface next to the polished/shiny surface that logically should be very similar in temperature. If such a surface is unavailable, you may want to attach a piece of non reflective/non reflective tape to the surface, or even use some paint. After a short wait and when the temperature has equalized, take the temperature of the paint/tape or the 'add-on' surface. The following image shows where you should point the device for maximum accuracy.

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Particles such as steam droplets, smoke or dust may prevent an accurate reading. Avoid getting these particles in the line of sight between the IR thermometer and the surface to be measured. One solution is to aim the thermometer from another angle if possible. Other examples include fog / mist / cloud that come from a fridge or freezer when you open it, or dust pollution along the roadside, and especially condensation on the sensor lens after moving the thermometer from a cold place to a warmer place. The condensation covers the lens and refracts light, making the reading inaccurate until the condensation on the lens evaporates. The following image is an example of how the calculation is made in the thermometer

Storage and care:
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This IR thermometer should generally be used and stored in an environment where the temperature is between 0 to 50 Degrees Celsius, and where relative humidity is between 10% to 95%, and kept as dry as possible at all times.

This device is sensitive to electrostatic discharge (static); Do not drop it, and keep the lens and the device away from foreign material such as dirt, dust and loose liquids which might stick to or enter the device, damage it or affect its accuracy.

Wipe the exterior with a damp cloth occasionally to keep it looking new. Do not touch or poke the lens. Make sure the lens is not covered with condensation before you try to read the results. Use air to blow dust off it gently if you have to remove dust. Do not touch the lens if possible. If you absolutely have to clean the lens due to an 'accident', do not push it in, and be EXTREMELY Gentle on the lens. This is not a normal camera lens. One small accidental hard push in the wrong direction will wreck your thermometer's precision. Do not use solvents to clean the lens, and do not submerge the main unit in water (thermocouple excepted)

Safe use of Laser feature:
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A laser is not a toy. Keep this device out of reach of children. Never point the laser at other people, as it may cause eye injury. Never look at the laser beam with any optical instrument. Do not point the laser beam at mirrors or other shiny objects, as the reflection may cause injury. Remove batteries from the device when it is not in use to prevent accidental exposure.

Re-calibrating the thermometer:
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The accuracy of the thermometer is affected by many things including air pressure and your distance above sea level.

It is easy to do a mental mathematical re-calibration of this thermometer, as the relative readings from this thermometer are quite stable. However you cannot adjust the displayed numbers directly. For example; to do a mathematical re-calibration on the TC probe , put the TC probe in a pot of plain boiling water and measure the temperature. Plain distilled water usually boils at 100 degrees Celsius at atmospheric ground temperature, so if the thermometer read 104 degrees in plain boiling water, just subtract 4 degrees from each future reading, etc... Note that impurities in water (like salt) and 'super clean' smooth pots can prevent water from boiling at the normal 100 degrees (see super heated water in wikipedia). Alternatively, just compare it to an accurate thermometer, and put a small note on the thermometer indicating the difference in accurate temperature.

This same method applies to the Infrared (IR) sensor.

Our opinion about its features
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We have pointed this IR thermometer at nearly everything in our office. The readings are quite accurate and we found an interesting difference in temperature between the floor and our ceiling. (We also pointed it at the clouds in the sky for fun).

We used a blue Eveready battery which cost $1.00 from a local discount store. It hasn't run out after hours of use (and that is a long time since each use is only ~10 seconds. We also used rechargeable batteries and they worked fine.

If you were to point the thermometer at your forehead, and then at another person's forehead at the same distance in the same circumstances, the difference in both readings would be extremely accurate. and can be used to tell how much 'hotter' another person is compared to yourself. However the 'exact temperature' numerical (number) reading has a limited level of accuracy which is stated in the technical section.
We think the double sensor is a great help for measuring liquids and reflective surfaces. Don't forget to clean the thermocouple if you use it for measuring food or liquids, and don't submerge the thermocouple sensor probe in corrosive liquid or acid.

It is normal that the environment around the thermometer can cause an incorrect reading. Examples include fog / mist / cloud that come from a freezer when you open it, or dust pollution along the roadside, and even condensation on the lens after moving the thermometer from a cold place to a warmer place.

Play around with it and you should be able to get to know all its capabilities and any factors that will affect its performance. Although the manufacturer doesn't recommend it for medical uses, our staff member measured the temperature in the mouth and found it to be quite accurate within 1 degree. Although it can be very accurate some times, we still do not recommend it for highly professional / medical usage where pin point accuracy is required. Unofficially, you will probably be able to tell if someone has a fever with this device, but that is up to you if you want to use it that way. We make no warranty to the accuracy of the device due to the great number of external influences or factors involved at any one time.

It is definitely a must have device around the house or in a restaurant, especially if you do a lot of food preparation, cooking or hobby work using ovens , heaters and cooling systems.

We would recommend it to users for most applications at home and in the field or workshop without excessive changes in temperature..

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Question: Does this device store temperature readings in memory?
Answer: The device is designed to display constantly updated (live) temperature readings. When you release the trigger and if no button is pressed for 5 seconds, the last reading is displayed for 5 seconds and removed from memory. No further storage is provided.

Question: What is the range of this thermometer?
Answer: Answer explained above in the "General item description" section stated above.

Question: Can it be used to take human body temperature? How about for medical usage?
Answer: Answer explained above in the "Applications Notes for the IR thermometer" section stated above.

Question: Can i re-calibrate this thermometer?
Answer: Yes and No, depending on what you see as re-calibrating. Please see the section above called "re-calibrating the thermometer"

Question: The readings on my thermometer are inaccurate.
Answer: This may be normal thermal shock, a dying battery, or may indicate a fault. It depends: Please look at the "Where to point this device" image in the "How do i use it "section above. It is normal that the air around the thermometer can cause an incorrect reading. Examples include fog/mist / cloud that comes from a freezer when you open it, or dust pollution along the roadside, or condensation on the lens after moving the thermometer from a cold place to a warmer place. Make sure the lens is not covered with condensation before you try to read the results. Use air to blow dust off it gently. Do not touch the lens if possible, If you absolutely have to clean it, do not push it in and touch the lens EXTREMELY Gently, one small push in the wrong direction will wreck your thermometer's precision.

Question: What is stated on the manual is slightly different to what is on this listing; which is more accurate?
Answer: The manual is generic. The data we have on our listing is usually more accurate in regards to weight, dimensions, size etc.

Question: The measurement using the Thermocouple is different from the infrared measurement, why is this so, which is more accurate?
Answer: Each method is influenced by different factors as described above. Personally, we would consider the Thermocouple measurement to be more accurate on most occasions if used correctly. For the most accurate calibration, put the TC probe in plain boiling water and measure the tempearture. If it reads 103 degrees, just subtract 3 degrees from each reading, etc... (this is mental mathematical recalibration since it is known that plain water boils, and stays at 100 degrees at normal ground atmospheric pressure)

Question: Does the LED lights affect the temperature readings?
Answer: Usually no, unless you have kept them on for a long time such that the heat from the LED creates significant blackbody radiation that reaches the IR sensor through the body of the device. The light itself has little or no effect on readings.