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Description
Optical Variable Attenuator EVA50-60Most compact and rugged portable attenuator on the market Three wavelengths: 1310nm 1490nm 1550nm Different attenuator range, 40dB, 60dB or 80dB Can save current value as reference Can save 10 tracks attenuation value Memorize the value after instruments shut down Energy save mode One year warranty and Three year recommended calibration interval Model EVA50 40 EVA50 60 EVA50 80 Attenuating Range 40 dB (SM) 60 dB (SM) 80 dB (SM) Calibrated Wavelengths
Most compact and rugged portable attenuator on the market
Three wavelengths: 1310nm / 1490nm / 1550nm
Different attenuator range, 40dB, 60dB or 80dB
Can save current value as reference
Can save 10 tracks attenuation value
Memorize the value after instruments shut down
Energy save mode
One-year warranty and Three-year recommended calibration interval
| Model | EVA50-40 | EVA50-60 | EVA50-80 |
| Attenuating Range | 40 dB (SM) | 60 dB (SM) | 80 dB (SM) |
| Calibrated Wavelengths | 1310nm / 1490nm / 1550nm | ||
| Fiber Mode | SM | ||
| Attenuating Mode | Digital | ||
| Display Resolving Power | 0.1dB | ||
| Display | LCD, 128*64 | ||
| Max Input Power | + 21 dBm | ||
| Return Loss* | 40 dB | ||
| Insertion Loss* | 2.5 dB | ||
| Connector | FC/PC (or customize) | ||
| Uncertainty | ± 0.5 dB | ||
| Repeatability* | ± 0.2 dB | ||
| RS-232 | Optional | ||
| Auto Power Off | No operation in 10 minutes (can be canceled), Low battery energy | ||
| Battery Charge | Yes | ||
| Operate Time | Above 20 hours | ||
| Power Supply | 3 * AA batteries or AC/DC adapter | ||
* at 20±3℃, CW, with FC/PC connector,1550nm
| Size(H*W*D) | 190mm * 90mm * 40mm | |
| Weight/td> | About 450g | |
| Storage Temperature | -20 -- +60°C, < 90%RH | |
| Operating Temperature | -10 -- +50°C, < 90%RH | |
EVA50-XX
Model
EVA50-40 = 40dB
EVA50-60 = 60dB
EVA50-80 = 80dB
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
4.7 ★★★★★
Based on 26 reviews
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Product Reviews
★★★★★ 5
Best frother ever!
Color: Black
I’ve had this frother for over a year now and it’s by far the best I’ve ever had. I purchased others in the past and they would not hold charge or end up not working after a while, but this one holds a charge forever and has lasted well over a year. It’s easy to use and powerful. Highly recommend!
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Reviewed in the United States on May 20, 2026
★★★★★ 5
Best choice!
Color: Blue, Color: Blue
This is the best of the best!!! Very sturdy, reliable, cleans easily I love it! Had others and this one beats them all!
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Reviewed in the United States on May 11, 2026
★★★★★ 4
The best frother I ever had
Color: White
I have been using frothers to make a daily matcha latte since 2016 and, since each of them lasted only between 4 to 12 months, I had purchased many of them.
This one is absolutely the best one! I bought it in July 2025 and I surely hope this will last more than one year. I will update my review if it stops working too soon.
But , for now, it has been great! I totally love the strong, fast engine. It perfectly whips up my matcha latte in just 3-4 seconds! As I use a very tall cup, I never experienced any overflowing of the liquid.
It feels heavy and stronger than my previous one, and I like that.
The reason I took off one star is because it doesn’t come with a metal stand considering that it is not possible to keep it standing up on the kitchen counter because, on the top, it has a robber cover that it is not flat. I am using an old stand from one of the previous frothers but, as this frother is much heavier, it keeps falling down. It would be nice to have a stand that fits this frother!
Other than that, so far, it is the best frother I have ever had!
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Reviewed in the United States on November 14, 2025
★★★★★ 5
Really powerful, responsive customer support
Color: Blue
Awesome for mixing protein powder into milk, Gatorade powder into water, making salad dressings, basically the kinds of work that would be overkill for an immersion blender. The unit I got started to vibrate like crazy after a few weeks. Contacted support and they said it was likely that the whisk rod was bent and said they'd refund me the cost of a new rod. We'll see if that solves the problem, but overall, I am impressed by their product and aftersales support.
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Reviewed in the United States on May 20, 2026
★★★★★ 5
powerful, efficient and long lasting
Color: Black
we've had this for a year and half now and it has held up!! we use it daily for coffee drinks. we also use it to mix powdered flavored drinks, when i do that it literally will make the WATER foam! its really powerful. and has definitely been worth the price as its lasted a year and a half.
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Reviewed in the United States on March 29, 2026
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