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Description
MAJ MT550Digital Insulation Testers 250V 500V 1000V Voltage Ranges Insulation Tester Overview The MT550 is a 1000V Digital Insulation Tester easy to use handheld meter and has three test voltage ranges 250V, 500V and 1000V together with two continuity ranges. Whilst doing the insulation test, the large LCD will indicate the insulation resistance together with the actual output voltage. Once the test is complete the circuit under test will be automatically
Digital Insulation Testers • 250V-500V-1000V Voltage Ranges
Insulation Tester
Overview
The MT550 is a 1000V Digital Insulation Tester easy-to-use handheld meter and has three test voltage ranges 250V, 500V and 1000V together with two continuity ranges. Whilst doing the insulation test, the large LCD will indicate the insulation resistance together with the actual output voltage. Once the test is complete the circuit under test will be automatically discharged. The MT550 features an AC and DC voltage ranges, battery voltage indication, resistance and a continuity buzzer. If AC voltage is detected, the LCD will display the actual voltage to the user except in the off position.
Features
- Three test ranges 250V-500V-1000V
- 750V AC voltage and 1000V DC voltage ranges
- Live Circuit warning and buzzer
- Data Hold function
- 1mA output current on insulation test
- 200mA short circuit on continuity range
- Continuity Buzzer
- Automatic discharge after test
- Lock down Test Button for continuous use
- Hands free strap and magnet supplied as standard accessories
- Rubber overmould housing
- Illuminated display
Accessories:
- Test Leads
- Black Crock Lead
- Magnetic Strip
- Carrying Case
- Adjustable shoulder strap
- 6 x AA Batteries
- Instruction Manual
Specifications
| DC Voltage |
0 – 1000V |
|---|---|
| DC Voltage resolution |
1V |
| DC Voltage accuracy |
±(0.8% +3) |
| AC Voltage |
0 – 750V |
| AC Voltage resolution |
1V |
| AC voltage accuracy |
±(1.2%+10) |
| Resistance |
200Ω – 200KΩ |
| Resistance resolution |
0.1Ω |
| Resistance accuracy |
±(1% + 2 Digits) |
| Insulation resistance 250V |
250V |
| Insulation resolution 250V |
0 – 200MΩ |
| Insulation accuracy 250V |
±(3.0% +5) |
| Insulation resistance 500V |
500V |
| Insulation resolution 500V |
0 – 200MΩ |
| Insulation accuracy 500V |
±(3.0% +5) |
| Insulation resistance 1000V |
1000V |
| Insulation resolution 1000V |
0 – 2000MΩ |
| Insulation accuracy 1000V |
±(5.0% +5) |
| Short Circuit Current |
1.0mA |
| Over-range indication |
Yes |
| AC Bandwidth |
40Hz – 400Hz |
| Digital Display |
Dual LCD Display |
| Continuity |
Yes |
| Auto discharge |
Yes |
| Input Impedance |
˃10MΩ VDC & ˃10MΩ VAC |
| Data Hold |
Yes |
| Back Light |
Yes |
| Enclosure |
Double moulded |
| Low battery indication |
Yes |
| Power Supply |
6 x AA |
| Weight |
700g |
| Dimensions |
200 x 92 x 50mm |
| Safety Specs |
IEC61010-1 CAT IV 600V |
Downloads
Additional Information
| Keywords | major tech, MT550, insulation tester, insulation, tester, digital |
| Device | Insulation Tester |
| Type | Digital |
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 16 reviews
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Product Reviews
★★★★★ 5
good quality
Size: 4" - Black, Style: Open Hooks
Really strong magnets. Holds up stall cleaning forks on the trailer wall even when under way
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 4, 2026
★★★★★ 5
Good product
Size: 2.5", Style: Closed Hooks
Strong magnets that stay on wall once applied. Definitely holds the weight that it says it holds on the product. Good size to hold my halters in my barn. Would buy again and I think the price was a little high for this product, but it was worth the purchase.
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Reviewed in the United States on May 26, 2026
★★★★★ 5
Versatile and Sturdy Storage Solution
Size: 2.5" & 4" - 4 Pack, Style: Open Hooks, Size: 2.5" & 4" - 4 Pack, Style: Open Hooks
The GATOR MAGNETICS Open Storage Hook has been a great (pricey) solution for adding hooks that are strong and useful. Its simple yet robust design makes it incredibly versatile for various uses around the house.
The hook feels sturdy and durable, capable of holding a surprising amount of weight without bending or warping. Installation is as easy as blinking your eyes; the really strong magnets allow for easy attachment to any magnetic surface, and the hook remains securely in place.
I've used it for hanging lights and bags in my office and bedroom, providing a neat and accessible storage solution in any setting.
The open design ensures quick access to items without the hassle of removing them from a closed loop, which is a fantastic convenience. The magnet seems to be protected well enough with a rubber surface so that I don't have to worry about damaging my tables that I have attached these hooks.
In terms of value for money, this storage hook is pricey but no competition that I've seen with the same level of durability and convenience. I'm impressed by its performance and versatility, making it a must-have for anyone looking to organize their space efficiently.
Pros:
Sturdy and durable build quality
Easy magnetic installation on metal surfaces
Versatile usage for multiple items
Convenient open design for quick access
Doesn't damage surfaces
Cons:
None that I've encountered so far! (Maybe price?)
Overall, I highly recommend the GATOR MAGNETICS Open Storage Hook for its durability, versatility, and exceptional functionality. It's a small investment that brings significant organization and efficiency to any space.
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Reviewed in the United States on November 21, 2023
★★★★★ 5
Amazingly strong and versatile
Size: 2.5" & 4" - 4 Pack, Style: Open Hooks
I saw these advertised on Instagram and immediately purchased a 4 pack. I really wanted them to work but after trying them on 4-5 different steel surfaces I couldn't'[t get any of them to stick well or hold anything heavier than a wet towel. Maybe a bad batch? A shame.
The company took the time to reach out to me after seeing my first review where the hooks wound stick to metal poles in my studio. I definitely was not expecting them to reach out to address my issues with the hooks I purchased and returned. After trying the new replacement hooks out I now could not be more impressed! They are strong, well made and easy to use. The hooks and the magnetic baskets are phenomenal and I highly recommend them. I did a test with the hooks, which held a 75 lb weight with no issues on the side of a craftsman tool box! It seems that any early product issues are fixed. The customer service is fantastic and they really took the time to address the issues and keep their customers coming back happy. Well done! Gator Magnetics is definitely a class act in my book!
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Reviewed in the United States on April 15, 2024
★★★★★ 5
Easy to use!
These work great for a metal workshop! Holds up my 6ft ladder and pressure washer hose with ease. Definitely recommend
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Reviewed in the United States on April 20, 2026