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Red analog multimeter with magnetic interior, compact rectangular shape

TENMARS ELECTRONICS

TENMARS ELECTRONICS YF-370A interior magnetic multimeter electrician tool

SKU CH-F47M-M33F3 MPN YF-370A

Analog multimeter with interior magnetic shielding, DC current to 0.25A, AC/DC voltage to 1000V, resistance to 20MΩ, transistor hFE test, continuity buzzer, AF output -10dB to +22dB, 148x99x41mm, 322g

  • Labor warranty1 Year
  • Product typeTest Equipment
  • Color and finishRed
  • Number of items1 pack
  • Sold asBox
  • Parts warranty3 Years
  • Interior magnetic design shields readings from external fields
  • Analog scale measures up to 1000 V AC and DC
  • Transistor hFE test checks gain directly on the meter
  • Overload protection diode plus 0.5 A fuse guards the circuit
  • Compact 148 x 99 x 41 mm body weighs about 322 g

Professional Interior Magnetic Multimeter

The Tenmars YF-370A is an analog multimeter built for electricians who need stable readings near transformers or heavy conductors. Its interior magnetic movement rejects external fields that would deflect a standard needle, giving reliable indications on noisy job sites. The instrument covers AC and DC voltage to 1000V, DC current from 50µA to 0.25A, and resistance up to 20MO.

Transistor Test and Audio Range Extend Utility

A dedicated hFE socket lets technicians check transistor gain without a separate tester, while the AF output scale spans -10dB to +22dB for quick audio-level checks. Overload protection comes from a diode clamp and a single 0.5A 5Ø x20mm fuse, both replaceable in the field. The meter ships without the required two 1.5V UM-3 cells and one 9V 006P battery.

Compact Handheld Build With Standard Leads

The red case measures 148 x 99 x 41mm and weighs about 322g with batteries fitted, so it rides easily in a tool pouch or belt holster. Standard banana-jack inputs accept common test leads, and the analog scale requires no backlight or firmware updates. Buyers needing auto-ranging, data logging, or true-RMS digital accuracy should consider a different instrument class.

How it compares

Measured against everything we stock in Electrical Trade Tools & Kits, at today’s prices. Recalculated every night.

Price $72.99
Cheaper than about 67% of the 5,006 comparable items (median $95.99).

Specifications

Product
Brand nameTENMARS
Model nameYF-370A
Product typeTest Equipment
Color and finishRed
In the box
Number of items1 pack

Questions about this item

How often should I replace the 0.5A fuse and the two 1.5V plus one 9V batteries?

Replace the 0.5A (5×20 mm) fuse only after it blows from overload; swap the two 1.5V UM-3 and one 9V 006P cells when the analog pointer becomes sluggish or readings drift.

Which measurement range will hit its limit first during continuous high-current testing?

The DC current range tops out at 0.25 A, so sustained loads above a quarter-ampere will hit that ceiling before the 1000 V voltage or 20 MΩ resistance ranges.

Does the analog meter generate noticeable heat or fan noise when left on all day?

No fan is present and the passive analog movement produces negligible heat; only the transistor hFE test draws extra current from the 9 V cell during use.

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