# Multimeter Unit UT139C — handheld digital multimeter for voltage, current and resistance measurement

**URL:** https://aio.lv/en/product--unit-mie0156--5282810
**Data updated:** 2026-04-26 18:24 (EEST)
**Category:** Measuring tools
**Manufacturer:** Unit
**Manufacturer code:** MIE0156
**EAN:** 5901436796749
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 51.49 €
**Prices and availability valid until:** 2026-07-27 23:59
**Price without VAT (21%):** 42.55 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--unit-mie0156--5282810

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 07.07.2026 | free |
| Pickup points | 10.07.2026 | 1.89 EUR |
| Courier delivery to door | 10.07.2026 | 4.99 EUR |

## Summary description

The Unit UT139C is a handheld digital multimeter designed for basic electrical measurements: AC/DC voltage, DC current and resistance measurement. It provides essential functions for troubleshooting and testing in electronics, automotive and household electrical systems. The compact device is suited for technicians, hobbyists and field service use.

## Long description

The Unit UT139C — handheld digital multimeter for voltage, current and resistance measurement is a compact instrument designed to perform essential electrical checks. It measures AC and DC voltage, DC current and resistance, and is intended for troubleshooting and basic testing in electronics, automotive and household electrical systems. The meter's compact size and straightforward controls make it suitable for on-site work and general inspection tasks.
Advantages
The Unit UT139C provides essential measurement functions in a portable form factor, combining voltage (AC/DC), DC current and resistance measurement in one handheld device. Its simplified operation and clear readout reduce setup time for routine checks, while the compact housing and battery operation support field use. The device focuses on core functionality for technicians, hobbyists and service personnel who need a reliable tool for basic electrical diagnostics.
Suitable for
 Basic electrical troubleshooting in home wiring and appliances
 Automotive electrical checks such as battery and circuit testing
 Electronics repairs and prototyping for checking voltages, currents and resistances
 Field service inspections where a compact, battery-powered meter is required
When it may not be suitable
The Unit UT139C is designed for basic measurements; it does not provide advanced features such as true RMS AC current measurement, frequency, capacitance, temperature, or inrush current testing. It is not intended for precision laboratory measurements or for use on high-energy industrial systems where specialized safety ratings and higher measurement ranges are required.
Key specifications
 Measured quantities: AC voltage, DC voltage, DC current, resistance
 Form factor: handheld, compact housing
 Display: digital readout (numeric)
 Power supply: battery-powered (portable)
 Typical use: electronics, automotive, household electrical systems
How to use
Turn the rotary selector to the required measurement type and range, connect the test leads to the appropriate input terminals, and place the probes on the circuit points to be measured. For voltage measurements use the parallel connection across the component or circuit, for current measurement place the meter in series with the load, and for resistance measure with power removed from the circuit. Observe probe polarity when measuring DC signals and follow safety practices to avoid short circuits.
What to consider before purchase
 Required measurement functions — ensure AC/DC voltage, DC current and resistance cover your needs
 Measurement ranges and resolution appropriate for your applications
 Safety requirements for your work environment and whether additional certification or higher-rated equipment is necessary
 Need for advanced features (true RMS, frequency, capacitance) not provided by this model
Usage recommendations
Use insulated test leads in good condition, select the correct measurement range before connecting to live circuits, and remove power from circuits when measuring resistance. Store the meter in a dry environment and replace batteries promptly to maintain reliable readings.

## FAQ

### How much does the Multimeter Unit UT139C cost, and is it available for purchase?

The price is 51.49 € (valid at the time of publication and already includes all taxes). The item is available for order — 198 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. More information about warranty service: https://aio.lv/en/warranty

## Image

https://aio.lv/img/cache/product/5282810/42299181_large.webp