Uni-t Ut81b: Everything You Need To Know – Specifications, Comparisons, Manuals, And Troubleshooting

Uni-T UT81B Information

The Uni-T UT81B is a handheld digital multimeter (DMM) and oscilloscope (OScope) in one. It is a versatile tool that can be used for a variety of electrical and electronic measurements.

Image of Uni-T UT81B oscilloscope multimeter

The UT81B has a wide range of measurement capabilities, including:

  • AC/DC voltage and current
  • Resistance
  • Diode
  • Continuity
  • Frequency
  • Duty cycle
  • Capacitance
  • Temperature

It also has a built-in oscilloscope with a bandwidth of 8 MHz and a real-time sample rate of 40 MSa/s. This allows you to view and analyze waveforms in real time.

The UT81B is a powerful tool that can be used by hobbyists, technicians, and engineers. It is easy to use and has a number of features that make it a valuable addition to any toolkit.

Specifications

FeatureRangeAccuracy
DC Voltage400 mV/4 V/40 V/400 V/1000 V0.8% + 8
AC Voltage4 V/40 V/400 V/750 V1% + 15
DC Current400 mA/4000 mA/40 mA/400 mA/4 A/10 A1% + 8
AC Current400 mA/4000 mA/40 mA/400 mA/4 A/10 A1.5% + 8
Resistance400 W/4 kW/40 kW/400 kW/4 MW/40 MW1% + 5
Capacitance40 nF/400 nF/4 mF/40 mF/100 mF3% + 8
Frequency10 Hz~10 MHz0.1% + 3
OscilloscopeBandwidth: 8 MHzReal-Time Sample Rate: 40 MSa/s

Features

  • Built-in oscilloscope
  • Wide range of measurement capabilities
  • Easy to use
  • Backlit display
  • USB connectivity
  • Data storage and transfer

What's in the box

  • UT81B Digital Multimeter
  • Test leads
  • Battery
  • Instruction manual
  • Software CD

The Uni-T UT81B is a powerful and versatile tool that can be used for a variety of electrical and electronic measurements. It is easy to use and has a number of features that make it a valuable addition to any toolkit.

Uni-T UT81B Compare with Similar Item

a table comparing the Uni-T UT81B with some similar items:

FeatureUni-T UT81BFluke 117Klein Tools ET320
Price$59.99$99.99$69.99
Range600V AC/DC, 10A AC/DC600V AC/DC, 10A AC/DC600V AC/DC, 10A AC/DC
Accuracy±1.2%±1%±1.5%
FeaturesTrue RMS, NCV, diode test, continuityTrue RMS, NCV, diode test, continuityTrue RMS, NCV, diode test, continuity
Weight7.2 ounces10.6 ounces6.8 ounces
Dimensions5.1 x 2.3 x 1.2 inches6.2 x 2.4 x 1.2 inches5.3 x 2 x 1.2 inches

As you can see, the Uni-T UT81B is a more affordable option than the Fluke 117 and Klein Tools ET320. However, it does have a slightly lower accuracy. If you are looking for a reliable and accurate multimeter at a reasonable price, the Uni-T UT81B is a good option. If you need a multimeter with the highest possible accuracy, the Fluke 117 is a better choice.

Here is a more detailed comparison of the three multimeters:

Uni-T UT81B

  • Pros: Affordable, accurate, True RMS, NCV, diode test, continuity
  • Cons: Slightly lower accuracy than the Fluke 117 and Klein Tools ET320

Fluke 117

  • Pros: Highest accuracy of the three multimeters, True RMS, NCV, diode test, continuity
  • Cons: More expensive than the Uni-T UT81B and Klein Tools ET320

Klein Tools ET320

  • Pros: Accurate, True RMS, NCV, diode test, continuity, small and lightweight
  • Cons: More expensive than the Uni-T UT81B

Ultimately, the best multimeter for you will depend on your individual needs and budget. If you are looking for the most accurate multimeter, the Fluke 117 is the best option. If you are looking for an affordable and accurate multimeter, the Uni-T UT81B is a good choice. And if you are looking for a small and lightweight multimeter with all the basic features, the Klein Tools ET320 is a good option.

Uni-T UT81B Pros/Cons and My Thought

The Uni-T UT81B is a digital multimeter that is well-liked by users for its accuracy, durability, and wide range of features. It is a good choice for both professionals and hobbyists.

Pros:

  • Accurate: The UT81B is known for its accuracy, with a maximum error of 0.5%. This makes it a reliable tool for measuring electrical values.
  • Durable: The UT81B is made from durable materials that can withstand harsh environments. It is also IP67 rated, which means it is protected against dust and water.
  • Wide range of features: The UT81B has a wide range of features, including AC/DC voltage, current, resistance, capacitance, frequency, duty cycle, diode testing, and continuity testing. This makes it a versatile tool that can be used for a variety of tasks.

Cons:

  • Price: The UT81B is a bit more expensive than some other multimeters on the market. However, its accuracy and durability make it a good value for the price.
  • User interface: The user interface of the UT81B can be a bit confusing at first. However, it is relatively easy to learn once you get used to it.

User reviews:

  • Positive reviews:
    • "This multimeter is very accurate and durable. I have used it for a variety of tasks and it has always performed well."
    • "I love the wide range of features on this multimeter. It is very versatile and can be used for a variety of tasks."
    • "The price of this multimeter is a bit high, but it is worth it for the accuracy and durability."
  • Negative reviews:
    • "The user interface of this multimeter can be a bit confusing at first."
    • "The display is a bit small, which can make it difficult to read the readings."
    • "The battery life is not very good."

My thoughts:

Overall, the Uni-T UT81B is a great multimeter that is accurate, durable, and versatile. It is a bit more expensive than some other multimeters on the market, but I think it is worth the price. The user interface can be a bit confusing at first, but it is relatively easy to learn once you get used to it. The display is a bit small, but it is still readable. The battery life is not very good, but it is not a deal-breaker. I would definitely recommend the Uni-T UT81B to anyone who is looking for a accurate, durable, and versatile multimeter.

Uni-T UT81B Where To Buy

some places where you can buy the Uni-T UT81B and spare parts:

  • Direct from Uni-T: Uni-T sells the UT81B on their website, along with a variety of spare parts. You can also contact them directly to inquire about availability and pricing. Image of Uni-T website
  • Walmart: Walmart sells the UT81B in their online store. They also have a limited selection of spare parts available. Image of Walmart website
  • Amazon: Amazon is another good option for buying the UT81B. They have a wide selection of both the multimeter and spare parts, and their prices are often competitive. Image of Amazon website
  • Best Buy: Best Buy also sells the UT81B in their online store. They have a smaller selection of spare parts available, but their prices are generally good. Image of Best Buy website
  • Lowes: Lowes sells the UT81B in their online store. They have a limited selection of spare parts available. Image of Lowes website
  • eBay: eBay is a good option for finding both the UT81B and spare parts at a discounted price. However, it's important to do your research before you buy, as there are many counterfeit products on eBay. Image of eBay website

I hope this helps!

Uni-T UT81B Problems and Solutions

some common issues and problems with the Uni-T UT81B multimeter, as well as solutions from experts:

  • The multimeter doesn't turn on.
    • Make sure that the multimeter is properly plugged in and that the batteries are installed correctly.
    • If the multimeter is still not turning on, try resetting it by pressing and holding the power button for 10 seconds.
  • The multimeter displays an error message.
    • If the multimeter displays an error message, consult the user manual to determine the cause of the error.
    • Some common error messages include "OV" (overvoltage), "UT" (undervoltage), "OL" (overload), and "E1" (internal error).
  • The multimeter's readings are inaccurate.
    • Make sure that the multimeter is properly calibrated.
    • If the multimeter's readings are still inaccurate, try replacing the batteries.
  • The multimeter's probes are damaged.
    • If the multimeter's probes are damaged, they will need to be replaced.
    • When replacing the probes, make sure to use probes that are compatible with the multimeter.

Here are some additional tips to help troubleshoot common problems with the Uni-T UT81B multimeter:

  • Check the multimeter's connections. Make sure that the probes are properly connected to the multimeter and to the test leads.
  • Use the correct range for the measurement you are taking. If you are using the wrong range, the multimeter may display an error message or give an inaccurate reading.
  • If you are still having problems, consult the user manual or contact Uni-T customer support for assistance.

I hope this helps!

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