Extech EX320 Mini Digital Multimeter

Extech EX320 Mini Digital Multimeter

The Ex 320 DMM is a miniature multimeter with eight of the most essential functions and non-contact voltage detector. It’s so small that you can hide it in your palm. At the same time it would serve your purposes of fault detection in electrical circuitry.


  • Automatic range selection
  • Basic accuracy is 0.5%
  • Built in non-contact voltage sensor (NCV) with beeper and LED indicator
  • Large LCD display at a high contrast
  • Maximum hold and data hold action
  • Auto Power off

Non-contact voltage detection is a good safety feature. Before going to work on a system you are made aware of the presence of voltage. Maximum hold enables you to see the maximum value of a pulsating data. You can hold any data to watch later.

Functions present

Voltage measurement on the DMM starts at 0.1mV and terminates at 600V. This is true for both AC and DC volts. 0.1 µA is the lowest ampere range to be measured on this meter and the highest ampere range covered is 10 A. Resistance measuring range of this instrument is 0.1Ω to 20 MΩ. Diode and continuity test is there on the meter.

The DMM weighs only 260 grams. So you can easily carry it anywhere you like. The holster of the meter is strong enough to protect it. It has a tilt stand to place the meter at a convenient angle. The Multimeter is supplied with test leads and two AAA batteries.

Price: $40.95

Extech MN36 Mini Multimeter

Extech MN36 Mini Multimeter

The MN36 is an auto ranging mini multimeter. Small or not, it has all basic functions of a professional multimeter. It is so small that you can comfortably keep it in the pocket of your trousers. It’s well shaped to hold and operate easily.

Functions present

Extech’s MN36 measures AC/DC voltages and AC/DC amperes. The highest voltage range on this instrument is 600V for both AC and DC. Lowest range for DC is 400 mV and for AC it’s 4V. Maximum ampere range is 10 A and minimum is 400 µA in both the cases.

Resistance measuring ranges start from 400Ω and finish at 40 MΩ. Capacitance, frequency and temperature measuring ranges of the meter are also very much convenient for an electrician’s use. K-type thermocouple is included in supply with the instrument that measures temperature as high as 1400°F (750°C).

Features worth mentioning

The instrument comes with a good number of features worth pointing out, such as the following:

  • Large and bright digital display
  • Very small in dimension and weight
  • Well protected in rubber holster
  • Auto range selection
  • Data hold option is present
  • Power source is simple two AAA batteries
  • Continuity and diode test is possible

The DMM is supplied with test leads and two AAA batteries for operation. Yes, the temperature probe is also included. So you get a handy, mini multimeter at a very competitive price. At the same time it will serve you well in solving electrical and electronic system problems.

Price: $38.00

Extech EX505-K Industrial MultiMeter

Extech EX505-K Industrial MultiMeter

Ex 505-K is a digital multimeter kit designed for industrial use. The double molded outer shell of the meter makes it water protected and drop proof. It carries all necessary functions required by an industrial electrician. K-type temperature element is also included in the DMM.

Functions available

The Ex505 is a true RMS instrument. A high contrast backlit display enables you to read a measurement anywhere in an industrial environment. Voltage range for both AC and DC is 1000 and current ranges are 10 A in either case.

The meter measures resistance up to 40 MΩ and capacitance range is 200µF. Measuring range of frequency is 10 MHz. Temperature as high as 1382°F is possible to measure with the DMM. You can test continuity and diode on this instrument. Basic accuracy is 0.5%.

The Kit

The instrument kit contains the following:

  • CAT IV 600V safety grade heavy duty multimeter
  • DV 25 model dual range AC voltage detector
  • TL 808 CAT III 1000 V test lead kit ( 8 pieces)
  • Heavy duty test leads
  • Type K thermocouple and connection adaptor
  • Magnetic hanger for hands free operation
  • Soft case to accommodate all the items

So you basically have all the accessories for electrical and electronic testing and measurement in a well organized manner in the nice, soft case.


The rugged design and IP 67 class of the DMM makes it water proof and drop proof (2 meters). This True RMS multimeter is very suitable for industrial use. Relative mode is present and data hold and auto power off features of the meter are of course also advantageous. The handy size and light weight (360g) of the meter makes it super value for the money.

Price: $100.79

Extech EX430 True RMS DMM

Extech EX430 True RMS DMM

The EX430 is a True RMS digital multimeter from Extech. It’s an instrument with almost all necessary facilities required by a professional electrician. Its basic accuracy is ±0.3% is quite good for an electrical technician. It has a nice outlook and handy size for holding comfortably in one hand. The display is sufficiently big (1 inch) and provided with backlight for easily catching the measured value.


It measures AC and DC voltages and currents; resistance and capacitance measuring facilities are also there on it. Furthermore, the EX430 possesses the functions to measure frequency, temperature, and duty cycle. You can test diodes and continuity also with this DMM.

Ranges available

This meter can measure AC voltage over the range 0.1mV to 750V, while DC voltage range is 0.1mV to 1000V. Current measuring ranges for both AC and DC are the same and it’s from 0.1µA to 20.0A. This is quite good a range for most of the purposes of an electrician. With an Ex430 you’ll have a very wide range in resistance measurement; this is from 0.1Ω to 40.0MΩ.

You know this instrument measures capacitance also and the range present for this measurement is 0.1nF to 100µF. The range is alright for most of domestic and industrial maintenance needs. Frequency measurement is another aspect of the handy tool. You can measure frequencies from 0.001Hz to 10MHz with it.

When you measure a duty cycle on this instrument, you get ranges from 0.1% to 99.9%. Ex430 provides you temperature measuring scope of up to 1382°F and a minimum of -4°F. In other words it’s -20 to 750°C.


Ex430 digital multimeter presents a good overall feature set.

  • True RMS value measurement
  • Auto ranging
  • Input fuse protection
  • Wrong connection warning
  • Data hold
  • Auto power off
  • Tilt stand, Protective holster, and Velcro hanger
  • Built in K-type thermocouple
  • 3 years warranty

So you may decide on an Extech EX430 DMM for your professional life as an electrical technician. It can be said confidently that this instrument will not disappoint.

Price: $64.84

Extech EX411 Review

Extech EX411 Review

The Ex 411 from Extech is a digital multimeter with a wide range of useful functions. It may be called a True RMS Multimeter. It’s protected by a built in rubber holster. Its front is deep green while the orange holster creates a contrasted outline. It looks good. It’s well shaped to fit your palm comfortably.


Its functions are voltage and current both in AC and DC, resistance, continuity, diode and temperature in °C and °F.

You may set its DC voltage range at 600, 200, 2V and 200mV. This is same for AC except the mV range which is not present on this meter. Accuracy of this instrument in measuring voltages differs a little from range to range. This is ±0.3 % to ±0.8% for DC and ±1.0% to ±3.0% in case of AC.

Current measuring ranges available are 200µ, 200m and 20A for DC circuits. For AC circuits you are to choose between 200m A and 20A ranges. Accuracies for DC swing between ±1.5% and ±2.5%. AC current measuring accuracy is some bad, it’s ±1.8% to ±3.5%.

This meter provides quite a broad spectrum of ranges in resistance measurement. The ranges are 200, 2000, 2k, 20k, 200k and 20MΩ. Accuracies of readings span from ±0.8% to ±2.0%.

For temperature measurement on an Ex 411 DMM a K type thermocouple probe is supplied with the instrument. It can measure any temperature within -20°C and 750°C. You can have the temperature in °F also.

The package

The package of Ex 411 contains:

  • The DMM
  • CAT III test leads
  • Tilt stand
  • Protective holster
  • Velcro hanging strap
  • K type temperature probe
  • 9V battery

If you want a professional DMM the Ex 411 is not a bad choice, even if it’s not quite on par with Fluke DMMs. You’ll get a True RMS Multimeter with a lot of features and functions for a  very reasonable price.

Price: $63.74

Extech EX420 Review

Extech EX420 Review

Ex 420 is a versatile electrical instrument that measures Voltage, Current flow and Resistance. It measures capacitor rating and temperature. It’s an Auto Ranging instrument with a lot of advantages and features. Proper handling as per instructions will provide you a longer life of this rugged tool.


Ex 420 is designed to provide a lot of functions including measurement and testing. Here are the major functions available from it:

  • Measurement of Voltage
  • Measurement of Resistance
  • Measurement of Current flow
  • Measurement of frequency
  • Measurement of Temperature
  • Relative Measurement of Voltage, Current and Frequency
  • Measurement of Duty cycle
  • Testing of diode
  • Testing of Capacitor
  • Testing of continuity

Maximum safe voltages of this meter are 1000V in D.C. and 750 V in A.C. So you can measure any voltage within these ranges safely. The ranges available in D.C and A.C on this meter are 400 mV, 4V, 40 V, 400 V and 1000 V/750 V. Accuracies in D.C. voltage span from ±0.3% to ±0.8% and for A.C voltage these are ±1.5% to ±3.0%. So it’s really an accurate meter for most of the purposes of an electrician.

Resistance values as low as 0.1 ohm is possible to measure with this meter. Ranges you can set on this instrument are 400, 4K, 40K, 400K, 4M and 40M ohm for resistance measurements. Accuracies are also quite satisfactory, from ±0.8% to ±3.0% in the high scale.

Current measuring ranges you can select on an Ex 420 are 400µA, 4000µA, 40mA, 400mA, 4A, and 20A. This is true for both A.C and D.C. Accuracies vary from ±1.5% to ±2.5% in case of D.C. amperes and ±1.8% to ±3.5% in case of A.C. amperes. Well, an Ex 420 can handle an A.C. voltage or current having frequencies from 50 Hz to 1000 Hz.

You have the opportunity to measure nF scale of capacitor value to as high as 100µF. The range almost covers all the capacitors of normal requirements.

Your frequency measurement needs are well attended by this meter. Its ranges for frequencies are from 5.0Hz to a maximum of 10.0MHz.

Temperature measurement with an Ex 420 requires a K type thermocouple probe. Temperatures are measurable in both the °F and °C scales and span is from -20°C to 750°C and equivalent °F.

Ex 420 carries many other facilities on it . It has wide ranges in all parameters and dependable accuracies are also present there. It needs a 9V battery for its power. Its backlit LCD display of 1 inch digits is very much visible even from a distance.

Use your Ex420 with care, it will return its price to you in multiples.

Price: $63.74

Extech EX330 Review (Autoranging)

Extech EX330 Review (Autoranging)

The Extech EX330 is a really an affordable multi-tool; a competent autoranging device that combines a multimeter with a built-in non-contact AC voltage detector as well as a built-in Type K thermometer. It offers 12 functions, including AC/DC voltage and current, resistance, capacitance, frequency, temperature and pulse ratio. Moreover, it has a large and easy to read display.

It withstands 10 A max current and also has a couple of extra features thrown in such as max hold, data hold and auto power off. Instead of the more common 9V battery, it uses two triple-A batteries. Also included is a projective holster, a stand and test leads.

In this price range it is probably the best multimeter you can find. This has actually been established in a full roundup of multimeters going for around $50 in a “shootout” by EEVBlog:

In all, it has an attractive set of features at a great price point, with an added bonus in the form of a no-touch current sensor and a temperature probe like the Fluke 87-5, although it is not quite playing in the same league as the Fluke. It’s a good fit for DIY folks of all categories; household appliances, wiring, computers and much more. You really can’t expect more than this from a $60 multimeter.

Price: $58.00

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