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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:
| Package Weight |
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Shipping Notes
- Free Standard Shipping on $100+ Orders 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]
- Please click here for more details>>> Return & Exchange Policy
4.5 ★★★★★
Based on 26 reviews
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Product Reviews
★★★★★ 5
absolutely must buy perfect for dogs. I have a large black lab and he has had so much fun with us.
Size: Large Size 3, Color: White-Blue
I have to say that my dog would be considered an aggressive tower. However, this ball has stayed intact. I love that it comes with the pump. It’s extremely functional very soft for catching can be cleaned. Very easy easy the quality is exceptional. Very functional does have a bounce. I can say he has had so much fun with this since it’s getting it for his birthday on 11/11 I highly recommend this product and would definitely buy again.
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Reviewed in the United States on November 23, 2025
★★★★★ 5
Perfect for keep-away
Size: Large Size 3, Color: Red-Blue
I purchased one of these for my pup and he has a ball throwing it up in the air and chasing it. Handy for something they can play with alone.
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Reviewed in the United States on May 24, 2026
★★★★★ 5
Great durable ball
One of my dog’s favorite toy. We have had this ball for almost a year and it is still intact. My Doberman loves it and has not been able to destroy it. The size is comparable to s tenis ball. It has a little weight to it witch makes it easy to trow further.
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Reviewed in the United States on May 21, 2026
★★★★★ 5
Best toy I’ve ever gotten for my dog
The toy allows you to interact with your dog in a way that I didn’t realize was so important until I adopted a dog who was ball obsessed and a bit disconnected. We have bonded so much over this toy and it has held up so much better than 95% of the toys I’ve gotten, which have all been labeled as high-quality or durable. It is perfect for playing fetch and for tugging, as well as training.
The only thing worth noting is that the rope is thin enough that it can be uncomfortable to tug with a large or strong dog. I usually wrap a leash around my hip and hook it to the rope when we are doing intense tugging (because my 75 pound dog would win otherwise).
If you do go for a tug toy that has a more comfortable handle, it will not bounce and be easy for a dog to run around with in the same way. This rope makes the weight heavily in favor of the ball, so it acts more like a ball and the dog is more inclined to grab the ball.
I think this toy finds right balance of ball to rope.
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Reviewed in the United States on August 5, 2023
★★★★★ 5
So good, I repurchased
This is one of my dog's fave fetch toys, and after losing it in a grassy field, I repurchased. The ball is heavy and durable, and the rope is sturdy and just the right length for flinging. When this comes out, my dog knows we're playing fetch!
There's no strange smell out of the package, and while my 70lb Samoyed isn't a hard chewer, he hasn't put a dent or nick in the ball itself. It's not so hard that I'd be worried about him gnawing on it, either.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 4, 2025
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