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Description
UNI-T UT381AIlluminance Meter, Range: 0~400000 lx, Resolution: 0~99. 99 lx (99. 99 fc), MAX MIN AVG, Data Hold, Auto Power OFF, Backlight, Bluetooth APP, Data Record: 99 Sets, Real Time, 235x64. 5x39. 8mm Illuminance Meter Overview UT381A is a safe and reliable digit light meter with wide range measurement, widely used in lighting applications, laboratory, office, street lights construction, commercial venue and others. Features Wide measurement range, 0~400000
Illuminance Meter, Range:0~400000 lx, Resolution:0~99.99 lx (99.99 fc), MAX/MIN/AVG, Data Hold, Auto Power OFF, Backlight, Bluetooth APP, Data Record:99 Sets, Real Time, 235x64.5x39.8mm
Illuminance Meter
Overview
UT381A is a safe and reliable digit light meter with wide range measurement, widely used in lighting applications, laboratory, office, street lights construction, commercial venue and others.
Features
- Wide measurement range, 0~400000 lx
- Probe of integrated, split and rotatable design
- Data storage
- Bluetooth APP connection supported
- Color Correction Coefficient(CCF)
- Real-time display
Specifications
| Specifications | UT381A | |
| Certificates | CE, UKCA, RoHS | |
| Resolution | 0~99.99 lx (99.99 fc) | 0.01 lx (0.01 fc) |
| 100~999.9 lx (999.9 fc) | 0.1 lx (0.1fc) | |
| 1000~400000 lx (37160 fc) | 1 lx (1fc) | |
| Accuracy | ±3% calibration as per standard light source when in 2856K. | |
| ±6% calibration as per other visual light source. | ||
| Unit Switch | lx、fc, 1fc=10.764 lx | |
| Auto Range Switch | Yes | |
| MAX/MIN/AVG | Yes | |
| Data hold | Yes | |
| Color Correction Coefficient（CCF） | Yes | |
| Backlight | Yes | |
| Bluetooth APP | Yes | |
| Data Record | 99 sets | |
| Record Interval | 1~59 seconds | |
| Measuring Methods of Probe | Integrated(rotatable)、split design | |
| Real-time | Time is automatically updated with manual setting or phone APP connection. | |
| Over-range Indication | OL display | |
| Low Battery Indication | Auto power off when low battery icon flashes for 10s | |
| Auto Power Off | Auto power off if no operation in 10 seconds. (cancelable) | |
| Battery | AAA*3 | |
| Battery Life | Over 100 hours（Alkaline batteries，Bluetooth and Backlight is off.） | |
| Working Temperature and Humidity | -10°C~50°C，＜90%Rh(non-condensing) | |
| Storage Temperature and Humidity | -20°C~70°C, ＜80%Rh(non-condensing) | |
| Weight | About 257g, not battery included | |
| Characteristic | ||
| Standard accessories | 1*Quick start guide, 3*1.5V AAA battery, 1*Strap, Safety instructions, gift box | |
| Power | 3*1.5V AAA battery | |
| Product size | 235*64.5*39.8mm | |
| Product net weight | 257g | |
| Standard quantity per carton | 5pcs | |
| Standard carton size | 395×290×160mm | |
Downloads
Additional Information
| Device | Meter |
| Type | Illuminance |
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
4.1 ★★★★★
Based on 21 reviews
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Product Reviews
★★★★★ 5
Soft and cool. Very cool. 🧊
Size: Queen, Color: White
I bought these for my memory foam pillow and they’re excellent for cooling it. I use 2 of these on the pillow for maximum chill factor and it works.
They’re very soft, the zippers are high quality. Easy to put on with a bit of stretch- generously sized. They’re stain resistant. I’m glad they’re NOT waterproof because they’d be too hot then. They’re very durable. Wash on delicate setting in a mesh bag and air dry and they last long. They’re very quiet- smooth and silky. Definitely recommend!
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Reviewed in the United States on January 15, 2026
★★★★★ 3
Cool enough
Size: Queen, Color: White, Size: Queen, Color: White
I thought I had purchased pillows so when I received these I was a little disappointed. However that was 100% on me for not reading the listing and just trusting my search. I decided to give them a try and so far they seem ok. They don’t stay cool even though I have them on cooling pillows. They are super thin but very soft. They fit on my pillows perfectly. I don’t think it has improved my sleep quality but it hasn’t made it any worse either. I don’t think they are waterproof but I don’t really want to test that. I like that the zipper is small and seems to be decent quality. Smelled heavily of chemicals when I first took it out of the package but that disappeared after a few minutes.
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Reviewed in the United States on March 21, 2026
★★★★★ 5
Sleep like a baby
Size: Queen, Color: White
These pillow covers are cool. They keep you cool at night. very, very comfortable.
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Reviewed in the United States on May 13, 2026
★★★★★ 5
Very well made.
Size: King, Color: White
These work great and look good.
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Reviewed in the United States on April 27, 2026
★★★★★ 5
Great pillow!
Size: Queen (Pack of 2)
They were a gift for my daughter and she loves them! She says they are comfortable and "squishy" and she sleeps better on them.
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Reviewed in the United States on May 5, 2026