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Description
DUOYI Digital Ground Resistance Meter Tester, DY4100A, DY4100B1. Ground resistance Re (Rg when testing soil resistivity p) 2. Range: 2 ohms 20 ohms 200 ohms 2000 ohms 3. Test range: 0. 03~2. 000 ohms 0. 03~20. 00 ohms 0. 03~200. 0 ohms 0. 03~2000 ohms 4. Voltage to ground (AC voltage): 600V Test range 0~600Vac 5. Photovoltaic voltage (DC voltage): 1500V Test range: 0~1500Vac 6. Test method: voltage drop method (applicable to the current and voltage test of the probe) 7. Display: segment LCD display, display
1. Ground resistance Re (Rg when testing soil resistivity p)
2. Range: 2 ohms/20 ohms/200 ohms/2000 ohms
3. Test range: 0.03~2.000 ohms/0.03~20.00 ohms/0.03~200.0 ohms/0.03~2000 ohms
4. Voltage to ground (AC voltage): 600V Test range 0~600Vac
5. Photovoltaic voltage (DC voltage): 1500V Test range: 0~1500Vac
6. Test method: voltage drop method (applicable to the current and voltage test of the probe)
7. Display: segment LCD display, display backlight
8. Battery voltage warning: Battery logo display
9. Continuous test times: In the 2 ohm range, test once every 30 seconds with a 1 ohm load, and can be repeated more than 400 times
10. Input exceeds display: Display "OL"
11. Automatic shutdown function: If there is no operation for 5 minutes after the key operation, the system will enter the automatic shutdown state
12. Overload protection: AC280V/10 seconds between E-S ports
13. Withstand voltage: AC3540V (50/60Hz)/5 seconds between the electrical circuit and the outer box
14. Insulation resistance: 50 milliohms or more between the electrical circuit and the outer box/DC 1000V
15. Power supply: 6 AA batteries (not included)
16. When testing the ground resistance and soil resistivity, the series interference voltage will be automatically tested synchronously, and a prompt will be given if there is an abnormal test result
17. High-definition display, clear reading, easy measurement
18. Multiple gear selection, can be adjusted according to different needs
19. Applicable to measurement in power, post and telecommunications, railway, petroleum, chemical, communication, mining and other departments
20. Dimensions: 173x125x68mm
Packing list:
- DY4100A instrument x 1
- Cloth bag x 1
- Instruction manual x 1
- Certificate x 1
- Test line x 1 (red 15m/yellow 10m/green 5m)
- Multimeter pen x 1
- Ground rod x 2
Specification:
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Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
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- Delivery to the USA:
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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]
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4.4 ★★★★★
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Product Reviews
★★★★★ 4
Great shirts have to iron first
Size: XX-Large Tall, Color: Black
They feel great the material, they’re thin, the style looks good, the length to and below my waist is good. For the cost they’re good shirts and they’re definitely loose fitting, however they shove them in a tight bag so if you plan on wearing this straight away from delivery day make sure you have an iron ready every single collar and I ordered over 7 shirts comes folded over. Took a star away for the fact they don’t pack them how you would find a higher price shirt packed and typically wear ready.
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Reviewed in the United States on December 11, 2025
★★★★★ 5
Simple and nice.
Size: 4X-Large, Color: Dark Grey
Nice shirt. Light weight. It’s true to size and skin friendly because it is cotton.
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Reviewed in the United States on May 13, 2026
★★★★★ 5
Perfect!
Size: Large, Color: Beige
Cool, comfortable, with a little stretch. Comes out of the dryer wrinkle free (be sure to hang it up right after you take it out of the dryer) price was reasonable. I measured my husband's neck and it fit exactly as it should. Good length to the back of it too, which is sometimes a problem for my husband. Do not see any quality issues. Not excessively thin or too thick. Really, I can't think of any way to improve on this shirt.
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Reviewed in the United States on April 18, 2026
★★★★★ 5
Nice and light with superior softness!
Size: Large, Color: Black
Nice soft material and fits well. I also like the lightweight feel. Will most likely buy other colors in this item.
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Reviewed in the United States on April 30, 2026
★★★★★ 3
Nice shirt, but sizing isn’t ideal for big and tall builds
Size: XX-Large Tall, Color: Black
The shirt itself is decent quality and looks good, but the fit wasn’t great for me. If you’re a big and tall guy, this may not be the best option.
The material has some stretch and feels comfortable, but the overall cut runs smaller and doesn’t offer much room in the shoulders or torso. It works better for slimmer or more standard builds.
If the sizing works for you, it’s a nice-looking shirt. Just be aware that it’s not very forgiving in the fit if you need extra room.
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Reviewed in the United States on December 31, 2025