Home  |  Products  |  Digital Multimeters  |  AM-500 Digital Multimeter Series  |  
This product is discontinued

Amprobe AM-550 Industrial Multimeter

The recall does not effect the
AM-550-EUR Digital Multimeter.

The Amprobe AM-550 is the best multimeter in its class designed for professional electricians who need to maintain service or troubleshoot advanced electrical systems in the most demanding environments. Packed full of features such as true-rms, dual thermocouples for taking differential temperature measurements, a low impedance function to detect stray voltage, and a low pass filter to accurately take measurements on variable frequency drives, the Amprobe AM-550 Digital Multimeter allows for quick go-no-go checks without the need for an additional tool.

AM-500 AM-510 AM-520 AM-530 AM-540 AM-550

Multimeter Type Auto-ranging Com / Res HVAC Electrical Adv. HVAC Industrial
Safety Rating Safety CAT III 600V CAT III 600V CAT III 600V
Cat II 1000
Cat II 1000
Cat II 1000
Cat II 1000
Measure voltage in noisy environments True rms

Electrical panels, AC outlets AC Voltage (V) 600 600 750 750 1000 1000
DC systems, auto/marine batteries DC Voltage (V) 600 600 1000 1000 1000 1000
AC Current - electrical panels, appliances AC Current (A) 10 10 10 10 10 10
DC Current-electronics, DC motors DC CURRENT (A) 10 10 10 10 10 10
Specified resistance and continuity Resistance (MOhms) 20 40 40 40 60 60
Flame sensors Microamps
Diodes in AC to DC converters Diode Test
Fuses, lightbubls, wire connections Continuity
Hosehold batteries Battery test

Motor startup or run capacitors Capacitance
Frequency verification Frequency
Non-contact voltage test Non-contact voltage
Electrical load-time on vs time off Duty cycle

Temp of air vents, fuses, transformers Temperature inputs

1 1 2 2
Automatically selects measurement range Autoranging
Manually select measurment range Manual ranging
Voltage on variable frequency drives Low pass filter

Detect stray voltages Low Z

Dimly lit areas Built-in flashlight
Meter resolution LCD Counts 2,000 4,000 4,000 4,000 6,000 6,000
Dimly lit areas Backlight
Monitoring fast changing signals Bar graph

Two relative measurements on one screen Dual display

Data memory Data hold
Difference between two measurements Relative reading
Max/min peak measurement Max/min hold

Specialized signal measurements Peak hold (crest)

Amprobe AM-550 Industrial Multimeter 4.8 5 8 8
great product this meter has plenty of useful features very handy March 30, 2012
Quality Built As a generator repairer it it important to get accurate readings. This quality multimeter has all the functions needed to trouble shoot faulty wiring with dead on accuracy. March 30, 2012
the amproble has excellent features like large display for easy viewing even is low light, can be dropped or slammed in doors and still dependablej I have worked for a company in the maintance deparment for many years and i have used amprobe and have used many other digital meters and i have found that amprobe have stood up through all the toughest jobs and the most reliable of all the meters i have used. the display is very clear and readable even in the lowest light the dial is easy to turn even with gloves on, tough enough to with stand being dropped from a second level (20') I would be proud to recommend amprobe to anybody looking for a good all around all porpose meter March 29, 2012
Durable and easy to use I wire electrical panels, so the bulk of my use is for checking continuity, but when I have used it for other purposes, it functions quite well, and I especially like the digital display screen. Obviously, in a shop environment, the meter occasionally gets dropped, but it has been extremely durable, absorbing all kinds of bumps and bruises. March 29, 2012
Great for medium/heavy duty industrial applications. we use this meter solely in all of our trucks. it handles being thrown around in the trucks and dropped from ladders. March 29, 2012
best meter going I am an industrial electrician and rough on my tools, The Am-5550 has got to be one of the most rugged meters I have ever owned. It has survived many drops and slams. the controls on the front are very quick and easy to use and the display is very easy to read in dim lighting. I would recommend this meter to anyone in the field. March 27, 2012
Great meter for a great price!! This meters offers more features, is rated for higher voltages, and works better overall than my other name brand meter in the same price range. I have decided all my future meters Will be Amprobe. If you need a meter you can trust, buy this one!!!! March 26, 2012
Great handheld! This meter is a great asset to any electrician/technician's tool box inventory. Easy to use, easy to hold, awesome features and price is affordable. It even has a built in flashlight which is a great feature that comes in handy in low light areas. A+ product! March 26, 2012
1-8 of 8
  • AC/DC Voltage up to 1000V, ac/dc current, resistance, frequency, capacitance, temperature, duty cycle.
  • CAT IV 600V, CAT III 1000V
  • Low Z - to detect stray voltages
  • Low pass filter for variable frequency drives
  • VolTect Plus™ Non-contact voltage detection
  • Audible continuity
  • Diode test
  • Dual reading backlit LCD display with analog bar graph
  • Data hold
  • Max/min memory
  • Peak hold (crest)
  • Relative zero mode
  • Built-in flashlight
  • Built-in test leads storage and “third hand holder
  • Warning against improper test leads connection
  • Auto and manual ranging
  • Auto power off
  • Low battery warning
FEATURE AM-550 Best Accuracy
True-rms X

AC Voltage 6.000 V, 60.00 V, 600.0 V, 1000 V +/- (1.0 % rdg + 3 LSD)
@ 45 Hz to 400 Hz, 0 V to 600 V
DC Voltage 600.0 mV, 6.000 V, 60.00 V,
600.0 V, 1000 V
+/- (0.5% rdg + 2 LSD) @ 6 V to 600 V ranges
AC Current 600.0 μA, 6000 μA,
60.00 mA, 500.0 mA,
10.00 A
+/- (2.0% rdg + 5 LSD)
@ 45 Hz to 400 Hz
DC Current 600.0 μA, 6000 μA,
60.00 mA, 500.0 mA,
10.00 A
+/- (1.5% rdg + 3 LSD)
Frequency 60.00 Hz, 600.0 Hz,
6.000 kHz, 60.00 kHz, 600.0 kHz,
6.000 MHz, 60.00 MHz
+/- (0.1% rdg + 3 LSD)
Resistance 600.0 Ω,
6.000 kΩ, 60.00 kΩ, 600.0 kΩ
6.000 MΩ 60.00 MΩ
+/- (1.0% rdg + 2 LSD)
@ 6 kΩ to 600 kΩ ranges
Capacitance 60.00 nF, 600.0 nF,
6.000 μF, 60.00 μF, 600.0 μF, 6000 μF,
60.00 mF
+/- (3.0% rdg + 5 LSD)
@ 600 nF to 60 μF ranges
Temperature -40 ⁰F to 1832 ⁰F
-40 ⁰C to 1000 ⁰C
+/- (1.0% rdg + 12) @ >104 ⁰F to 752 ⁰F
+/- (1.0% rdg + 8) @ >40 ⁰C to 400 ⁰C
Number of temperature inputs Dual Thermocouple

Duty cycle 10.00% to 90.00% +/- (1.2% rdg + 30 LSD) @ 5 Hz to 2 kHz

For more detailed specifications, please download the product datasheet under the “Resources" tab.
Model NameDescriptionBuy it
Amprobe AM-540 Advanced HVAC Multimeter Included Accessories:
  • 9V(6F22) x1 battery installed
  • Test leads
  • Type-K probe x 2
  • Temperature adaptor
  • Velcro strap
  • Carrying case
  • Users manual
Related Products

7 reviews
 Amprobe AM-520 HVAC Multimeter »

23 reviews
 Amprobe AM-530 True-rms Electrical Contractor Multimeter »

5 reviews
 Amprobe AM-560 Advanced HVAC Multimeter »

Home  | About Us  |   Privacy Statement  | Site Map  |  Contact Us © 1995 - 2019 Amprobe