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Test of infrared thermometer in the field
Facing the work with the measurement of temperatures on the pads in electric networks and heating systems in the near future there was a need for a contactless thermometer compact size for measuring the same water in the bath and other "ekologicheskih" things. This is a tested model DADZHET MT4004, as well as a comparative analysis with the more expensive contactless thermometers.
Thermometer from "Dadzhet" comes in original packaging with corrugated surface and the ear in order to "hang it on a nail".
Located on the back of technical information:
• Measuring range: -33...220 °C
• Accuracy: ± 2 °C
• Measurement in °C/°F
• Automatic shut-off
• Battery discharge indicator
• Emissivity: 0.95 fixed
The device itself is made of metal with a pleasant cooling surface. There is a resemblance with a ballpoint pen, only the latter is available at the end of the rod, and in our case the receiver of the infrared radiation.
Device thermometer the following: base, LCD display, power button, clip for easy wearing, switch the units of temperature measurement, the radiation receiver. The reverse side carries useful information at the disposal of the device, the certificate of conformity, the presence of 2 scales measuring the temperature and a window for changing it. The thermometer weighs 40g and is powered by 2 batteries, type LR44. To replace them you need to Unscrew the shiny cap, which features a sticker with the serial number, and replacement with the correct polarity.
Thanks to the compactness of the device it can be transported in a breast pocket and in the bag, for handles. Its dimensions are the following: 86mm length and 19.6 mm width.
What I would like to highlight in the grip, so that the inconvenience of measuring lefties. Holding the instrument with the left hand, the screen will show the temperature, is turned 180°. Perhaps the designer did not think about such trifles. But the fact is, they are.
The IR receiver range is performed by a lens with a window in the middle to conduct the measurement. Laser pointer to determine where the measurement is missing. Still, the device is positioning itself as a consumer, not a professional thermometer. Plus, for a more accurate measurement is advised to change the distance to a minimum. So, what are we going to do without him.
To maintain the charge in the batteries, as well as saving our resources, there is an automatic off after 15 seconds of inactivity. Before turning off the display shows "OFF" and the device goes to sleep.
Complete with thermometer features a manual and warranty card. To separately lay out the user manual I don't see sense, so will just link.
Get to the fun part in the survey non-contact thermometer, namely measurements and testing
The specifics of the work you have to work with these devices, so I have the following model: raynger st raytek, Optris MS and Chinese GM350. They have, as the observed model, fixed emissivity of 0.95. There are expensive versions of pyrometers (aka non-contact thermometer) where it is possible to change this ratio. He characterizes the surface properties of the object, the temperature of which measures directed at the pyrometer.
The first 2 devices have a high cost, $220 for the first model and €140 for the second, the Chinese equivalent of $17.
Raytek raynger st is a pretty old model, certificates for doing. Manufacturer: RAYTEK, USA
Optris MS. Manufacturer: OptrisGmbH, Germany. Looks like a TV remote curved at the end.
GM350. Manufacturer: China. A form similar to the Raytek reduced in size.
Main difference is methods of operation, and since most of them differ with thermometer from "Dadzhet", then all measurements will be adapted to it (same distance away).
First comparative measurements will be made on a plastic Cup with hot water drawn from the cooler. The average water temperature is about 70°C.
The close readings of American and Chinese thermometer, followed by MT4004 and in the tail of the German. That would reduce the claims that water tends to cool down, say the following, all photos were taken within 2 minutes and the most recent was made by a measurement device from the "Dadzhet", the temperature of which was higher than the Optris MS, whose photo made a minute earlier. Also in the specifications to MT4004 was a error of 2°C.
The following measurement was made on PRU (start-regulating device), people balastik for fluorescent lamps. By itself, it is still quite cold, after the measurements have the following picture: 3 of 4 thermometers have the same temperature, one half a degree below. From what we can conclude about the accuracy of the instrument from the review.
As without the freezing temperatures! So pull out a glazed cheese from the freezer and conduct measurements. All photos taken within one minute at room temperature. A clear leader, because the previous three readings could change from heating cheese. But the testimony of the Optris MS grieve at that time, too overstating, understating temperature.
In conclusion, I would like to tell you about our previous testing, when I got the thermometer from China. As then, Optris MS distinguished for its accuracy, and will allow to quote myself:
"If to take for a reference thermometer from RAYTEK, we see that with increasing distance to the object, it adds 0.4°C and holds this temperature. While Optris MS initially very different from 2 at the same temperature and decreased with the distance from the test point. GM550 removing more than a meter from the point of measurement, reduced temperatures of the last 1°C. But let's not be so categorical, because in comparison with the cost of other $220 and €140 for his $17 you can forgive such shortcomings. But only if you don't need a pyrometer with an accuracy of 0.1 degrees. Me to measure the heating of contacts in electrical networks error GM550 not play a significant role."
In this review, non-contact thermometer from "Dadzhet" did not fall face in the dirt, and confidently took the shot, so it's safe to advise it as the hosts (especially the mommies in their hard work) and cooks and Amateurs and other professionals where it is necessary to measure the temperature at shorter distances.
The main advantages and disadvantages of this device are the following:
+ compact
+ a margin of error of the measurements (we remember that it is not for measuring body temperature)
+ metal case
— a bit overpriced
— the absence of an index of the measuring point
— "easy to use only right-handed"
Finally, the choice is always yours! Good shopping! published
P. S. And remember, only by changing their consumption — together we change the world! ©
Join us in Facebook , Vkontakte, Odnoklassniki
Source: geektimes.ru/company/dadget/blog/275564/
Thermometer from "Dadzhet" comes in original packaging with corrugated surface and the ear in order to "hang it on a nail".
Located on the back of technical information:
• Measuring range: -33...220 °C
• Accuracy: ± 2 °C
• Measurement in °C/°F
• Automatic shut-off
• Battery discharge indicator
• Emissivity: 0.95 fixed
The device itself is made of metal with a pleasant cooling surface. There is a resemblance with a ballpoint pen, only the latter is available at the end of the rod, and in our case the receiver of the infrared radiation.
Device thermometer the following: base, LCD display, power button, clip for easy wearing, switch the units of temperature measurement, the radiation receiver. The reverse side carries useful information at the disposal of the device, the certificate of conformity, the presence of 2 scales measuring the temperature and a window for changing it. The thermometer weighs 40g and is powered by 2 batteries, type LR44. To replace them you need to Unscrew the shiny cap, which features a sticker with the serial number, and replacement with the correct polarity.
Thanks to the compactness of the device it can be transported in a breast pocket and in the bag, for handles. Its dimensions are the following: 86mm length and 19.6 mm width.
What I would like to highlight in the grip, so that the inconvenience of measuring lefties. Holding the instrument with the left hand, the screen will show the temperature, is turned 180°. Perhaps the designer did not think about such trifles. But the fact is, they are.
The IR receiver range is performed by a lens with a window in the middle to conduct the measurement. Laser pointer to determine where the measurement is missing. Still, the device is positioning itself as a consumer, not a professional thermometer. Plus, for a more accurate measurement is advised to change the distance to a minimum. So, what are we going to do without him.
To maintain the charge in the batteries, as well as saving our resources, there is an automatic off after 15 seconds of inactivity. Before turning off the display shows "OFF" and the device goes to sleep.
Complete with thermometer features a manual and warranty card. To separately lay out the user manual I don't see sense, so will just link.
Get to the fun part in the survey non-contact thermometer, namely measurements and testing
The specifics of the work you have to work with these devices, so I have the following model: raynger st raytek, Optris MS and Chinese GM350. They have, as the observed model, fixed emissivity of 0.95. There are expensive versions of pyrometers (aka non-contact thermometer) where it is possible to change this ratio. He characterizes the surface properties of the object, the temperature of which measures directed at the pyrometer.
The first 2 devices have a high cost, $220 for the first model and €140 for the second, the Chinese equivalent of $17.
Raytek raynger st is a pretty old model, certificates for doing. Manufacturer: RAYTEK, USA
Optris MS. Manufacturer: OptrisGmbH, Germany. Looks like a TV remote curved at the end.
GM350. Manufacturer: China. A form similar to the Raytek reduced in size.
Main difference is methods of operation, and since most of them differ with thermometer from "Dadzhet", then all measurements will be adapted to it (same distance away).
First comparative measurements will be made on a plastic Cup with hot water drawn from the cooler. The average water temperature is about 70°C.
The close readings of American and Chinese thermometer, followed by MT4004 and in the tail of the German. That would reduce the claims that water tends to cool down, say the following, all photos were taken within 2 minutes and the most recent was made by a measurement device from the "Dadzhet", the temperature of which was higher than the Optris MS, whose photo made a minute earlier. Also in the specifications to MT4004 was a error of 2°C.
The following measurement was made on PRU (start-regulating device), people balastik for fluorescent lamps. By itself, it is still quite cold, after the measurements have the following picture: 3 of 4 thermometers have the same temperature, one half a degree below. From what we can conclude about the accuracy of the instrument from the review.
As without the freezing temperatures! So pull out a glazed cheese from the freezer and conduct measurements. All photos taken within one minute at room temperature. A clear leader, because the previous three readings could change from heating cheese. But the testimony of the Optris MS grieve at that time, too overstating, understating temperature.
In conclusion, I would like to tell you about our previous testing, when I got the thermometer from China. As then, Optris MS distinguished for its accuracy, and will allow to quote myself:
"If to take for a reference thermometer from RAYTEK, we see that with increasing distance to the object, it adds 0.4°C and holds this temperature. While Optris MS initially very different from 2 at the same temperature and decreased with the distance from the test point. GM550 removing more than a meter from the point of measurement, reduced temperatures of the last 1°C. But let's not be so categorical, because in comparison with the cost of other $220 and €140 for his $17 you can forgive such shortcomings. But only if you don't need a pyrometer with an accuracy of 0.1 degrees. Me to measure the heating of contacts in electrical networks error GM550 not play a significant role."
In this review, non-contact thermometer from "Dadzhet" did not fall face in the dirt, and confidently took the shot, so it's safe to advise it as the hosts (especially the mommies in their hard work) and cooks and Amateurs and other professionals where it is necessary to measure the temperature at shorter distances.
The main advantages and disadvantages of this device are the following:
+ compact
+ a margin of error of the measurements (we remember that it is not for measuring body temperature)
+ metal case
— a bit overpriced
— the absence of an index of the measuring point
— "easy to use only right-handed"
Finally, the choice is always yours! Good shopping! published
P. S. And remember, only by changing their consumption — together we change the world! ©
Join us in Facebook , Vkontakte, Odnoklassniki
Source: geektimes.ru/company/dadget/blog/275564/
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