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The Mastfuyi Network Cable Tester FY8233E is a multifunctional tool designed for professional-grade cable maintenance. It accurately detects cable faults including open circuits, shorts, and miswiring, while enabling quick tracing of RJ11 and RJ45 cables without damage. It also tests telephone line status and polarity, with a built-in low battery indicator to ensure reliability. Compatible with Cat5 and Cat6 Ethernet cables, this battery-powered tester is a must-have for efficient LAN and telephone line troubleshooting.

































| ASIN | B09M6YPWTJ |
| Best Sellers Rank | #190,608 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #403 in Network & Cable Testers |
| Brand | Mastfuyi |
| Color | Black, Blue |
| Date First Available | November 18, 2021 |
| Item Weight | 7.1 ounces |
| Item model number | FY8233E |
| Manufacturer | Mastfuyi |
| Measurement Type | Multimeter |
| Min. Operating Voltage | 0.6 Volts |
| Package Dimensions | 7.83 x 4.61 x 1.93 inches |
| Power Source | Battery Powered |
| Specification Met | Ul 61010-1, Iec 61010-2-030 |
| Style | Blue |
| UPC | 728990021767 |
| Upper Temperature Rating | 60 Degrees Celsius |
T**E
Works but not as easy as you would think
Overall its a great product, does what i needed it to do and solve a problem for me. However you really need to read the 2 font instructions to understand how to use it. I bought it to specifically tone a coax cable. Got the device, set the dial to "tone" and nothing. Checked other settings, seemingly not working right and nothing. Put the unit on "scan" and i get a tone. No problem ill use it for my needs and return it defective. Fast forward, fixed my issue then decided to read t instruction. No joke on 2 font. i needed my phone to read it. Well low and behold, you get the tone feature my using scan, the "tone" on the dial is to check dial tone on a phone line. After looking over the instructions it does work as they say its just really odd why the settings are callled what they are. Am keeping as it comes in handy and was a good value just not intuitive like any other testing i own or have used.
B**V
Very good for the price
Lacks a 200VAC setting but the 600VAC rounds pretty close. My other meter showing 123.5VAC and this one will show 124 - 125VAC. Other settings seem to be good. Tested a 1.5V AAA and 9V alkaline with another and it was spot on. The capacitor tester is also good. The contactless voltage detection also worked well but of course always check outlets, etc. with probes. 5* because it's $10 and don't expect much on build quality. But with the cover it feels nice int he hand. I just wouldn't drop it and find out.
G**G
Many features
For an inexpensive entry level tool this was a good choice. Not sure about the claims but looking for a meter that measures frequencies for less than $15 seems like a lot to expect. What this does have is a backlight and several other desirable features. Can't even find some of those features in instruments like entry level Flukes and Uni T's etc. Just like many tools, several are sometimes needled for different jobs and projects. Leak proof batteries like Voniko or Lithium batteries are the first changes I make. The second thing to check is your probe leads. More often than not a quality set or simple wipe with alcohol prep pad will solve most prep issues. Overall I was pleasantly surprised with the purchase.
M**W
buen producto
C**T
AMAZING for the money
I work installing electronic security systems, so low voltage electrician. I'm still on my first one of these from 4 years ago and for 20$ just bought a bunch more for the new hires on my team. A wire toner is basically a necessity with the amount of wires we deal with and this thing does everything and more than the expensive models that cost 3X+ normally. After learning how to use it its an ethernet line diagnostic tool, non contact voltage tester, wire tracer, polling loop tester, and continuity tester. The cheaper unshielded wand is actually MORE useful than the fancy expensive ones because you can hear the hum of high voltage lines, the pulsing of data lines, and the ringing of the toner itself pretty clearly. The network line tester does basic pair testing but if you watch closely you can find a dimmer light on a potentially poor termination, sometimes just needing to fix one pin on an end rather than completely redoing it. If you do any kind of low voltage or data work I HIGLY recommend this. Oh and the cheap fisher price plastic case has stood the test from 20' falls to midwestern summers and winters left in the truck. Sure it seems cheap, and it is, but its well worth it
P**I
A decent meter with a major glitch
The multimeter appears to work with decent accuracy. However, if the multimeter is left unused in the “ON” position for more than 30 seconds, it goes into a sleep mode but the digital display continues reads 0.0, which leads you to believe the meter is still active. I wasted several minutes, checking connections on my Golf Cart’s wiring system before I figured out the multimeter was in a sleep mode and not reading the voltage. You have to turn the meter to the off opposition and back on to get a reading. This glitch makes the multimeter extremely difficult to work with . I’d like to ask the manufacturer is this its design or is my multimeter defective.
A**S
Recomendado
J**R
Save your money
Worked properly three times, now both functions on right side won't come on.
P**K
Calidad precio buena
E**A
Ce testeur de câble est pratique, multifonction et très facile d'utilisation. Il fait parfaitement le travail attendu.
F**S
Facile da usare e molto pratico!
K**T
Funktioniert einwandfrei und wurde schnell geliefert.
D**E
Works fine qnd price is good. The audio noise is very noisy with interference and it is hard to pinpoint 1 cable in a bunch but its already a time saver to at least follow the cabling inside the car to find an issue.
Trustpilot
2 weeks ago
3 weeks ago