{{ totalProductsCount }}

In cart {{totalProductsCount}} item(s)

Total:
{{sum | formatAmount}}

Your cart is empty

header-product Multimeter Unit UT139A CAT III with diode testing, handheld digital multimeter
40.49 €

Multimeter Unit UT139A CAT III with diode testing, handheld digital multimeter

Multimeter Unit UT139A CAT III Photo 1
Keep track of price changes You keep track of price changes
Watch the price drop

Leave your address - as soon as the price of the product goes down, you'll know about it right away

You keep track of price changes

Multimeter Unit UT139A CAT III with diode testing, handheld digital multimeter

{{email}}
You keep track of price changes

Multimeter Unit UT139A CAT III with diode testing, handheld digital multimeter

{{email}}
{{selectedOffer && selectedOffer.price | formatAmount}}

Short description

Handheld digital multimeter Unit UT139A CAT III designed for measuring electrical parameters and performing diode tests. Provides basic measurement functions for voltage, current and resistance (model features vary), includes diode testing capability and CAT III safety rating for installation-level work. Suitable for electricians, technicians and DIY users for troubleshooting and routine electrical checks.
Available for order: 57 pcs.
Warranty: 2 Years
SKU: 7703264
Manufacturer: Unit
free shipment

Cheapest delivery:

Venipak Pickup LV, Venipak Locker LV

Pick-up points

Venipak Pickup LV

Venipak Locker LV

Cost

1.89 €

Deliver

{{selectedOffer.parcelStationDeliveryString}}

Customer service center
2b. Kengaraga str., Riga, Latvia, LV-1063
07.07.2026 {{selectedOffer.officeDeliveryString}}
free
Courier Delivery Please note that in case of a large parcel additional delivery costs may apply!
10.07.2026 {{selectedOffer.courierDeliveryString}}
From 4.99 € (Weight: 0.55 kg)
Parcel couriers
Venipak Pickup LV / Venipak Locker LV / Latvijas Pasts pakomāts / Unisend LV / DPD Paku skapis / Omniva LV / Latvijas Pasts nodaļa
10.07.2026 {{selectedOffer.parcelStationDeliveryString}}
From 1.89 €
payment
Payment Methods:
Bank transfer, Bank cards on-line, Apple Pay, Google Pay
Together cheaper
{{product.price | formatAmount}}
{{product.title}}
{{productBundle.reference.specialPrice | formatAmount}}
{{productBundle.title}}
{{productBundlePreviousPrice | formatAmount}}
{{productBundleSpecialPrice | formatAmount}}

You saving {{productBundleYouSave | formatAmount}}

Product information

Description

Multimeter Unit UT139A CAT III with diode testing, handheld digital multimeter is a compact instrument designed for measuring common electrical parameters and performing diode checks. The Unit UT139A provides standard functions for voltage, current and resistance measurement, combined with a diode test mode and a CAT III safety rating suitable for installation-level tasks. Its handheld form factor makes it convenient for electricians, technicians and DIY users performing routine troubleshooting and verification on circuits and equipment.

Advantages

The Unit UT139A delivers a balance of essential measurement functions with a clear display and diode testing capability in a single handheld device. The CAT III safety rating allows measured circuits at installation level to be assessed with appropriate protection, while the meter's portable size supports field use and quick checks. Basic measurement coverage for voltage, current and resistance simplifies everyday diagnostics without the need for multiple instruments.

Suitable for

  • Measuring AC and DC voltage on electrical installations and equipment
  • Checking continuity and resistance in wiring and components
  • Performing diode tests and simple semiconductor checks
  • Troubleshooting household and light commercial electrical faults
  • Routine maintenance and verification by electricians and technicians

When it may not be suitable

The Unit UT139A is intended for basic measurement tasks and may not be suitable where high-precision laboratory-grade readings are required. It is also not designed for specialty measurements such as low-frequency power analysis, high-current clamp measurements, or advanced waveform capture.

Key specifications

  • Measurement functions: AC/DC voltage, current, resistance, diode test (feature set may vary by model)
  • Safety rating: CAT III for installation-level use
  • Form factor: handheld, portable design
  • Display: digital readout for numerical measurements
  • Typical applications: basic electrical troubleshooting and component checking

How to use

Start by selecting the appropriate measurement function and range if manual range selection is required, then connect the test leads to the meter and to the circuit points under test. For voltage and current measurements, observe proper polarity and safety practices, and ensure the meter is set to the correct AC or DC mode. Use the diode test function to verify semiconductor junctions by connecting the leads across the diode and reading the forward drop or open indication. Turn off power and discharge capacitors before performing resistance or continuity checks on circuits that are normally powered.

What to consider before purchase

  • Confirm the required measurement ranges for voltage, current and resistance match your typical tasks
  • Verify that CAT III safety rating is appropriate for the intended installation-level use
  • Check whether additional features (e.g., true RMS, data hold, backlight) are needed for your work
  • Consider the availability of replacement test leads and batteries for field operation

Usage recommendations

Always follow basic electrical safety procedures: inspect leads and meter for damage before use, do not exceed the specified measurement limits, and wear appropriate protective equipment when working on live installations. Use the diode test and resistance functions on de-energized circuits and select the correct measurement mode to obtain reliable readings.

Description

Machine translation. Load original

Similar products

{{product.title}} Show details Hide details

{{highlightedFeature.featureTitle}}:

{{getProductFeatureValueById(product, highlightedFeature.featureId)}}

{{product.price | formatAmount}}
Might be useful
{{product.manufacturerName}}
{{product.categoryName}}
{{product.title}}
{{product.specialPrice}}
{{product.price}}

Customer reviews

Customer questions

FAQ

How much does the Multimeter Unit UT139A CAT III cost, and is it available for purchase?

The price is 40.49 € (valid at the time of publication and already includes all taxes). The item is available for order — 57 pcs. are in stock, and you can place your purchase right now with delivery across Latvia and Europe or choose pickup at the Riga collection point. We offer favorable purchase terms, including the option to split the payment into convenient monthly installments. Availability and price are updated in real time, so we recommend placing your order in advance.

If I order this product today, when will I receive my order?

If you place your order today, delivery will be as fast and convenient as possible. You will be able to pick up your order on 07.07.2026 at the Riga pickup point or choose delivery across Latvia and Europe. We carefully inspect every purchase and pack it securely for safe transportation.

What payment options are available?

AiO.lv offers several payment methods: Bank transfer, Bank cards on-line, Apple Pay, Google Pay. All transactions are 100% secure and encrypted.

Can this product be purchased for a company (with VAT)?

Yes. AiO.lv works with legal entities in Latvia and across Europe. The product price already includes VAT. For certain product categories, as well as for companies from other EU countries with a valid VAT number, a 0% VAT rate may apply. We issue the invoice immediately after the order is placed, support electronic BIS invoices, and automatically generate all necessary accounting documents. You can complete the purchase for a company online — simply select the company profile and choose bank transfer as the payment method during checkout.

What is the warranty period?

All Unit products come with an official 2 Years warranty. It covers all manufacturing defects and malfunctions that may occur during use. The warranty is valid at all authorized Unit service centers and through AiO.lv

Can the product be returned after purchase?

Yes, you can return the product within 14 days of purchase if you bought it as a consumer (not a legal entity). Returns are possible without giving any reason — the main condition is that the product retains its original appearance and full set of accessories. We will make the process as simple and convenient as possible: just contact our customer support team, and we will help you arrange the return.

Where should I contact for warranty service?

For warranty-related questions you can contact the AiO.lv (SIA VSPRO) customer support team. We will assist with consultation, warranty claim processing, and coordination with certified service centers.
warranty
14-Day Return Policy We are confident in our quality, but if the purchase doesn’t fit — you have 14 days to return the product with peace of mind.
shipping
Fast Delivery Get your orders as quickly as possible — right to your door, parcel lockers, or pickup points across Latvia and the EU.
payment
Secure Payment Pay the way you prefer: cash, VISA, MasterCard, Apple Pay, Google Pay, bank transfer, or 0% installment plan.
warranty
Quality Since 2008 AiO.lv has been on the market for over 18 years and has earned trust — with more than 6000 genuine positive reviews on Google.