Amprobe AM-420 Residential Digital Multimeter

(5 customer reviews)

  • Test leads installed
  • Measures AC/DC voltage
  • Measures DC current
  • Measures resistance
  • Audible continuity alert
  • Rated to CAT II 250 V
  • Diode testing
SKU: 4306513 Category:


Designed for in home repair and electrical testing applications, the AM-420 Digital Multimeter accurately measures voltage in receptacles, switches, extension cords and light fixtures. Use the continuity function to easily troubleshoot light bulbs and fuses. This compact tools is designed for in-home repair and electrical testing applications, including measuring presence of voltage in electrical sockets, extension cords, batteries and other electrical circuits up to 250 V. It is a must have tool for residential projects including installation, troubleshooting or repair of light fixtures, fans or appliances. DC ranges of voltage and current are included to help with automotive diagnostics of electrical systems. The battery test feature checks the amount of charge remaining in standard 1.5 V and 9 V batteries.

safety certifications


AM-420 Best Accuracy
AC Voltage
200.0 / 300 V +/-(1.5% rdg + 4 LSD)
@ 45 Hz to 400 Hz, 2 V to 200 V
DC Voltage
200 mV
2.000 / 20.00 / 200.0 / 250 V
+/-(1.2% rdg + 2 LSD)
@ 200 mV to 200 V
DC Current
200.0 µA
2.000 / 20.00 / 200.0 mA
+/-(1.2% rdg + 5 LSD)
@ 200 µA to 20 mA
200.0 Ω
2.000 / 20.00 / 200.0 kΩ
+/-(1.5% rdg + 5 LSD)
@ 200 Ω to 200 kΩ
Diode Test
Battery test
1.5 V, 9 V +/-(5.0% rdg + 1 LSD)
Data Hold
General Specifications
Maximum display
1999, updates 2 to 3/sec
Operating temperature
32°F to 104°F (0°C to +40°C)
Relative humidity
32°F to 86°F (0°C to +30°C) ≤75%; 86°F to 104°F (+30°C to +40°C) ≤50%
Pollution degree
Operating altitude
≤ 6561 ft (2000 m)
Storage temperature
14°F to 122°F (-10°C to +50°C)
Electromagnetic compatibility
In an RF filed of 1V/m = Specified accuracy ± 5%. RF field > 1V/m is not specified.
Over-range indication
” 1 “, “-1” or maximum display reading
One 9V alkaline battery (6LF22, 6LR61, MN1604) or equivalent
Battery life
Alkaline: 100 hours typical
Low battery indication
safety certifications
Overvoltage Category
Safety Compliance
IEC 61010-1, UL 61010-1 2nd Ed. and CAN/CSA C22.2 No. 61010-1-04 Update No.1:2008
EMC Compliance
Conforms to IEC 61326-1
safety certifications
Dimensions (L x W x H)
4.5 x 2.6 x 1.6 in (115 x 65 x 40 mm)
Approximately 0.61 lb (275 g) with battery installed

What’s Included

  • AM-420
  • 9V alkaline battery (installed)


Datasheet »
Product Manual »

5 reviews for Amprobe AM-420 Residential Digital Multimeter

  1. Robert13

    Dead battery sent

    Meter sent to me with a dead 9 volt Golite battery ! Waste of my time to go put in an Amazon basic battery that worked fine. First test was to gauge the Golite battery that had almost zero juice. Let’s hope the meter works better than the weak battery I received.

    ✔ Yes, I recommend this product.

  2. HEM21

    Handy little meter

    Inexpensive DMM to have around the house or in the car. It has already helped me diagnose a weak car battery!

    ✔ Yes, I recommend this product.

  3. johnp4200080

    I love this meter

    i love this meter it is great i used it everyday to check power to ohm wires out when need to be check to see if i loss a nutarel it is realiable it is tough and i recommand this product to anybody that is looking for a great meter

    ✔ Yes, I recommend this product.

  4. Ostrich69

    Useful multimeter

    I have owned this multimeter for a few month now. It gets the job done I use it around my house and for small side jobs I recommend this to any general electricians out there do basic home installs. It has plenty of functions. The battery does last a good amount of time for being used very often. Overall great product.

  5. kryhar

    Great Product and price point

    I love this meter!!! i keep it in my personal truck so if i get a call in my work truck i dont have to run home to get the work truck.
    9/10 it will do everything i need on the job and if it wont im going to need the work truck for bigger tools anyways so my purpose it work 100% of the time !!! great product with a awesome price point. This is one product that is a must have for any home owner or repair company looking for a lite weight smaller meter this is it !!! would recommend to any one !

    ✔ Yes, I recommend this product.

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