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Description
UNI-T UT522 Earth Ground TesterSpecifications Range UT522 Earth resistance () 0~20 0~200 0~2000 0~40 (2%+20) 0~400 (2%+3) 0~4000 (2%+3) AC earth voltage (V) 0~200V 0~400V (1%+6) Frequency: 50Hz 60Hz Features Display count 4000 Manual range Auto power off Around 10 minutes Low battery indication Data hold Data storage 20 LCD backlight Full icon display Double insulation protection Poor contact display Over range display Display OL Simple 2 wire testing Precise 3 wire testing General
| Specifications | Range | UT522 |
| Earth resistance (Ω) | 0~20Ω | |
| 0~200Ω | ||
| 0~2000Ω | ||
| 0~40Ω | ±(2%+20) | |
| 0~400Ω | ±(2%+3) | |
| 0~4000Ω | ±(2%+3) | |
| AC earth voltage (V) | 0~200V | |
| 0~400V | ±(1%+6) | |
| Frequency: 50Hz/60Hz | √ | |
| Features | ||
| Display count | 4000 | |
| Manual range | √ | |
| Auto power off | Around 10 minutes | √ |
| Low battery indication | √ | |
| Data hold | √ | |
| Data storage | 20 | |
| LCD backlight | √ | |
| Full icon display | √ | |
| Double insulation protection | √ | |
| Poor contact display | “…Ω” | √ |
| Over-range display | Display “OL” | √ |
| Simple 2-wire testing | √ | |
| Precise 3-wire testing | √ | |
| General Characteristics | ||
| Power | 1.5V battery (LR6) x 6 | |
| Display | 70.6mm x 34mm | |
| Product color | Red and grey | |
| Product net weight | 560g | |
| Product size | 160mm x 100mm x 70.5mm | |
| Standard accessories | Batteries, simple test leads with alligator clips, standard test leads with alligator clips, | |
| earth spike, gallus | ||
| Standard individual packing | Gift box, carrying bag, English manual | |
| Standard quantity per carton | 8pcs | |
| Standard carton measurement | 530mm x 300mm x 350mm (0.056 CBM per standard carton) | |
| Standard carton gross weight | 19kg | |
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
4.6 ★★★★★
Based on 5 reviews
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Product Reviews
★★★★★ 5
Awesome
Color: Orange
Awesome Toy . My Jack is crazy over it. She usually get bored with others, but this toy still has her attention after a couple of weeks Runs a long time on a short charge. 👍🏻
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Reviewed in the United States on May 30, 2026
★★★★★ 2
Not the Fetch-Fest I Hoped For
Color: Orange
I had high hopes for the PetDroid Interactive Dog Ball, especially with the newly upgraded features and promises of durable, motion-activated fun. Unfortunately, it didn’t quite live up to expectations for my furry friend. Here’s why I’m giving it 2 stars.
Promising Features, Lackluster Results
The idea behind this toy is fantastic: a durable, motion-activated ball that would entertain my dog without much effort on my part. The ball is supposed to roll around on its own, keeping my dog engaged and active. However, in practice, it just didn’t capture my dog’s interest.
Durability
I will give credit where it’s due: the ball is well-made and seems durable. It can withstand some rough handling, which is great for more aggressive chewers. Unfortunately, durability doesn’t mean much if your dog won’t play with it in the first place.
Motion Activation
The motion activation feature is hit or miss. While the ball does move around as advertised, it didn’t seem to move in a way that intrigued my dog. He gave it a sniff, watched it for a minute, and then walked away, unimpressed. I tried multiple times to get him interested, but he simply wasn’t having it.
Lack of Engagement
The biggest issue is that the ball just didn’t engage my dog at all. It might be more suitable for a different personality type or breed, but for my pooch, it was a total flop. He’s usually quite playful and curious, so I was surprised by his lack of interest.
Final Thoughts
Overall, the PetDroid Interactive Dog Ball might work for some dogs, but it was a miss for mine. If your dog is easily entertained by automated toys, it might be worth a try. However, based on my experience, I can’t wholeheartedly recommend it.
Pros:
Durable construction
Motion-activated as advertised
Cons:
Did not engage my dog
Motion activation wasn’t intriguing enough
Might be more suitable for specific dog types or personalities
If you decide to give it a shot, just be prepared for the possibility that your dog might not find it as entertaining as you hope. For us, it’s back to the drawing board for a more engaging toy.
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Reviewed in the United States on June 14, 2024
★★★★★ 4
Pup Loves It, Some Other Notes
Color: Orange
We've had this for about six months and my 75 lb, 14-month-old German Shepherd pup LOVES IT. Her favorite is "Crazy Bouncing Mode." In fact, she doesn't care much for the normal mode. She chews it a lot - even drops it in her water bowl at times - and it's still going strong.
This is a great purchase. It's nice hands-off entertainment.
Do know that it is heavy compared to a normal ball - if your pup likes dropping it on the ground like mine does, it will land with a hard "thud," even with the included sleeve. Hopefully you don't have downstairs neighbors.
Also know that the cover that goes over the charging port is removable and your dog may choke on it if they chew it in just the right manner. Definitely only let the pup play with it while supervised.
All in all, great toy.
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Reviewed in the United States on February 11, 2026
★★★★★ 5
Yes!
Size: Medium
Durable. Squeak doesn't last forever with my aggressive chewers but crinkle does. Best balls.
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Reviewed in the United States on September 28, 2025
★★★★★ 5
Balls
Size: Medium
My dog loves chasing these balls. He seems to love the squeak! They fit the chuck it stick perfectly, and are great replacements for the originals that came with the stick.
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Reviewed in the United States on February 7, 2026