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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
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Product Reviews
★★★★★ 3
Just Ok.
Size: 4 pcs: 15.7*5.7, Color: Maple Wood, Size: 4 pcs: 15.7*5.7, Color: Maple Wood
They look nice but they aren’t sturdy and do not hold much weight. I’ve bought better ones on Amazon.
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Reviewed in the United States on January 12, 2026
★★★★★ 5
Worth
Size: 6 pcs: 15.7*5.7, Color: White
Really good wall amounts. I used the drywall anchors and it feels sturdy. I put like a 3 pound Crystal on it and it’s holding perfectly fine. I also was able to paint them with no problem would buy again.
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Reviewed in the United States on January 13, 2026
★★★★★ 5
Great quality
Color: Rustic Brwon, Size: 16in
Hassle but they work great. I love the color, the thickness and quality. They do have some weight but in my opinion, I prefer that. Right now the four shelves are holding up my WiFi routers and remotes. Will buy again
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Reviewed in the United States on May 4, 2026
★★★★★ 5
Good quality shelves
Color: Walnut, Size: 24in, Color: Walnut, Size: 24in
These shelves are gorgeous in person. Yes, they're darker than the listing pics, but I actually prefer it. The grain is beautiful, they came well-packed, and mounting them was no trouble at all. Now I've got display space that feels both stylish and practical. Definitely worth it!
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Reviewed in the United States on February 9, 2026
★★★★★ 5
AWESOME
Color: Rustic Brwon, Size: 16in
EASY INSTALL, I WILL BUY MANY MORE
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Reviewed in the United States on May 7, 2026