Comparison GTM SUN7B vs GTM SUN5/SUN7C
Add to comparison |  |  |
|---|---|---|
| GTM SUN7B | GTM SUN5/SUN7C | |
| Outdated Product | Outdated Product | |
| TOP sellers | ||
| Type | chameleon helmet | chameleon helmet |
Specs | ||
| Light filtering levels | 4 DIN | 4 DIN |
| Min. degree of darkening | 9 DIN | 9 DIN |
| Max. degree of darkening | 13 DIN | 13 DIN |
| Turn-on time | 33.3 ms | 40 ms |
| Filter class | 1/2/1/1 | 1/2/1/1 |
| Filter viewing area (WxH) | 98x55 mm | 98x43 mm |
| Filter cartridge dimensions (WxH) | 110x90 mm | 110x90 mm |
| Filter cartridge thickness | 9 mm | 9 mm |
| Optical sensors | 4 | 4 |
| Additional power supply | 2xCR2450 | 2xCR2450 |
| Operating temperature | -5 – 55 °C | -5 – 55 °C |
| Helmet weight | 460 g | 460 g |
Filter functions | ||
| Darkening adjustment | external mechanical | external mechanical |
| Sensitivity adjustment | external mechanical | external mechanical |
| Delay time adjustment | external mechanical | internal mechanical |
| Grinding mode | external mechanical activation | external mechanical activation |
| Colour rendering | True Color | True Color |
| Design features | controls outside | internal and external controls |
| Added to E-Catalog | may 2025 | may 2025 |
Compare GTM SUN7B and SUN5/SUN7C
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Glossary
Turn-on time
The turn-on time of the filter in the chameleon mask (see "Type"), in other words, the time between striking the arc and darkening the filter to the operating level.
From a safety point of view, the turn-on time should be as short as possible: the faster the "chameleon" works, the less bright light from the arc enters the welder's eyes. On the other hand, reducing the reaction time affects the cost of the product. So for relatively small volumes of work, it is quite acceptable to use relatively “slow” masks — for 100 μs or more(especially since even in the simplest models, the reaction time does not exceed 1200 μs, while theoretically the maximum allowable value is 2000 μs). But for more serious use, you should pay attention to more "fast" options; nowadays, you can find masks with response times from 75 to 100 µs, from 50 to 75 µs, and even less than 50 µs.
From a safety point of view, the turn-on time should be as short as possible: the faster the "chameleon" works, the less bright light from the arc enters the welder's eyes. On the other hand, reducing the reaction time affects the cost of the product. So for relatively small volumes of work, it is quite acceptable to use relatively “slow” masks — for 100 μs or more(especially since even in the simplest models, the reaction time does not exceed 1200 μs, while theoretically the maximum allowable value is 2000 μs). But for more serious use, you should pay attention to more "fast" options; nowadays, you can find masks with response times from 75 to 100 µs, from 50 to 75 µs, and even less than 50 µs.
Filter viewing area (WxH)
The size of the transparent part of the light filter — the "working window", the area through which the welder sees the place of work. A larger working window provides ease of use and a wide field of view, but it significantly affects the cost of the mask and somewhat reduces the strength of the light filter.
Delay time adjustment
The ability to manually set the delay time between the disappearance of the arc and turning off the filter in the chameleon mask. Such a delay is highly desirable in the light of the fact that even after the arc is turned off, the heated metal continues to glow for some time; therefore, it is advisable not to turn off the filter immediately. Adjusting the delay time allows the welder to independently choose the time to return to the non-working (maximally transparent) state.
Design features
— Backlight. Illumination system built right into the mask. This feature is very convenient when working in low light conditions: the backlight does not take up the hands (unlike hand-held flashlights) and does not create problems with wearing a mask (unlike headlamps), while the beam of light is always directed to where the welder's head is turned. On the other hand, such a system requires its own power supply. Therefore, it is used only in "chameleons", while the operation of the backlight additionally consumes battery power.