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Description
MAJ MT355Digital Loop Impedance & PSC PFC Tester 0~500VDC , Loop Imp L PE 0. 20~9999 (Hi Amp & No Trip) , Freq: 45Hz~65Hz , LCD Display , RE (Loop Method) 0. 20~9999 , PSC PFC Range 0~2kA , Bluetooth 4. 0 , 50V~500VAC , L N Line Res 0. 20~9999 , 200x95x50mm Digital Loop Impedance & PSC PFC Tester Overview The MT355 is a simple to use Earth Loop Impedance tester designed to make the accurate measurements of Earth Loop Impedance and Neutral Loop Impedance (Phase
Digital Loop Impedance & PSC/ PFC Tester 0~500VDC , Loop Imp L-PE 0.20Ω~9999Ω (Hi Amp & No-Trip) , Freq:45Hz~65Hz , LCD Display , RE (Loop Method) 0.20Ω~9999Ω , PSC/PFC Range 0~2kA , Bluetooth 4.0 , 50V~500VAC , L-N Line Res 0.20Ω~9999Ω , 200x95x50mm
Digital Loop Impedance & PSC/ PFC Tester
Overview
The MT355 is a simple to use Earth Loop Impedance tester designed to make the accurate measurements of Earth Loop Impedance and Neutral Loop Impedance (Phase Neutral Impedance) quick and easy. The MT355 performs two types of tests, the first being No-Trip technology to avoid tripping of RCD’s (ELCB’s) whilst performing the Loop Impedance Tests. The second test is the “TRIP” test, where high current <15A is used for the Loop Impedance test where the RCD (ELCB) must be bypassed. This is by far the largest, fastest and most accurate test available. The MT355 will automatically display the wiring status as well as test results for both Loop Impedance and Prospective Short Circuit current (PSC)/ Prospective Fault Current (PFC) for both NO-TRIP and TRIP tests. Earth Resistance is only activated in the L-PE “NO-TRIP” mode, and uses the Loop method to measure the RE. The instrument can automatically differentiate between AC and DC voltages up to 500V, if AC voltage is detected, the display indicates the AC voltage and mains frequency. The MT355 has a Phase Rotation Test, where the display indicates “123” for correct phase sequence and “321” for reversed phase sequence. With the Bluetooth function, users can transmit data to the Android or iOS mobile App for viewing, organising, and sharing recordings. The meter has a double moulded rubber case designed for heavy duty use.
Features
- Two types of Earth Loop Impedance tests including Non-Trip & Trip Hi-Amp
- Automatically display the wiring status as well as test results
- Smart wiring indicators that visual alerts for reversed wiring and socket wiring status
- Simultaneous display of loop impedance, PSC/PFC and RE
- Automatic AC/DC Voltage Detection up to 500V
- Phase rotation test ensures correct phase sequence in three-phase systems
- Auto lock-out feature prevents damage from overheating
- Bluetooth allows for seamless data transfer and monitoring
- Double moulded rubber housing for protection in harsh environments
Specifications
| Function | Range |
| Loop Impedance L-PE (Hi Amp & No-Trip) | 0.20Ω – 9999Ω |
| RE (Loop Method) | 0.20Ω – 9999Ω |
| L-N Resistance | 0.20Ω – 9999Ω |
| PSC/PFC Range | 0 – 2kA |
| AC Voltage | 50V – 500V |
| DC Voltage | 1V – 500V |
| Frequency | 45Hz – 65Hz |
| Bluetooth | 4.0 |
| Display | LCD Display |
| Batteries | 6 x AA |
| Dimensions | 200 x 95 x 50mm |
| Weight | 700g |
Downloads
Additional Information
| Device | Tester |
| Type | 0~500VDC |
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
4.1 ★★★★★
Based on 20 reviews
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Product Reviews
★★★★★ 2
Puppy loves it but the battery is awful
Color: Blue
Our puppy loves playing with this ball, it does what it says and keeps her occupied for the entire 10-15 minutes the battery lasts. I have to charge it several times a day, though the light never flashes red when the battery is low, it just doesn't work anymore. It also makes a beeping sound when she's playing with it that is super annoying, which sucks because the ball itself isn't super noisy even in the hardwood floors. I wouldn't purchase this again, and we'll probably have to toss it out within a week or two, I really don't see this thing lasting very long. Without the movement, it isn't a ball we would let her play with because she is a strong chewer and the material doesn't seem chew proof at all. I'm only giving it 2 stars because she really does love playing with it, but the battery life and beeping sound are atrocious.
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Reviewed in the United States on May 2, 2026
★★★★★ 1
Doesn’t hold charge
Didn’t last a week. Won’t charge. Shows fully charged but doesn’t move
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Reviewed in the United States on May 4, 2026
★★★★★ 5
Amazing
Color: Blue
Amazing toy, very well made. My Italian Greyhound puppy was busy for a long time. Very happy customer and my puppy. Thank you!
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Reviewed in the United States on April 29, 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