# Unit UT139S Digital Multimeter with Analog Bar, TRMS, 600V DC/AC, 10A, 60MΩ, 100mF, 10MHz, -40 to 1000°C

**URL:** https://aio.lv/en/product--unit-ut139s--11274946
**Data updated:** 2026-07-09 14:53 (EEST)
**Category:** Other goods
**Manufacturer:** Unit
**Manufacturer code:** UT139S
**EAN:** 6935750513965
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 78.75 €
**Prices and availability valid until:** 2026-08-09 23:59
**Price without VAT (21%):** 65.08 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--unit-ut139s--11274946

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | Wednesday | free |
| Pickup points | 20.07.2026 | 1.89 EUR |
| Courier delivery to door | 20.07.2026 | 4.99 EUR |

## Summary description

The Unit UT139S is a professional-grade digital multimeter featuring a high-resolution analog bar graph and True RMS measurement capabilities. It supports voltage up to 600V DC/AC, current up to 10A, resistance up to 60MΩ, capacitance up to 100mF, frequency up to 10MHz, and temperature measurement from -40 to 1000°C. Designed for industrial and electrical diagnostics, it provides precise readings for various electronic components and circuits.

## Long description

The Unit UT139S is a professional-grade digital multimeter engineered for precise electrical diagnostics and industrial maintenance. Featuring a high-resolution analog bar graph and True RMS (TRMS) measurement technology, this device ensures accurate readings even in complex electrical environments. It is designed to handle a wide range of electrical parameters, making it a versatile tool for technicians, engineers, and electronics enthusiasts who require reliable performance for testing circuits and components.
Advantages
This multimeter offers exceptional measurement accuracy and stability, which is essential for professional troubleshooting. The inclusion of a high-resolution analog bar graph allows users to visualize rapid changes in signals that a standard digital display might miss. Its robust construction is built to withstand demanding work environments, while the TRMS capability ensures that non-sinusoidal waveforms are measured correctly. The wide measurement range for voltage, current, resistance, capacitance, and frequency provides comprehensive diagnostic coverage in a single, compact unit.
Suitable for
Industrial electrical maintenance and troubleshooting
Testing and repairing electronic circuits
Automotive electrical diagnostics
Educational laboratory experiments
HVAC system temperature monitoring
When it may not be suitable
This device is rated for 600V applications and is not suitable for high-voltage industrial power distribution systems exceeding this limit. It is also not designed for specialized high-frequency RF engineering tasks beyond its 10MHz frequency measurement capability.
Key specifications
Measurement range: 600V DC/AC
Current capacity: Up to 10A
Resistance range: Up to 60MΩ
Capacitance range: Up to 100mF
Frequency range: Up to 10MHz
Temperature range: -40 to 1000°C
Display: Digital with analog bar graph
Measurement type: True RMS
How to use
To begin using the Unit UT139S, insert the test leads into the appropriate input jacks based on the parameter you intend to measure. Select the desired function using the rotary dial. For voltage or current measurements, ensure the leads are connected in parallel or series respectively. The analog bar graph will update in real-time to show signal fluctuations. Always ensure the device is set to the correct range or auto-range mode before making contact with the circuit under test.
What to consider before purchase
Verify that the 600V maximum input meets your specific voltage requirements.
Ensure the temperature probe is compatible with your intended application environment.
Consider the need for periodic calibration to maintain measurement accuracy.
Usage recommendations
Always inspect the test leads for damage before use and ensure the multimeter is set to the correct function to prevent damage to the internal circuitry. Store the device in a dry, cool environment when not in use to prolong its operational lifespan.

## FAQ

### How much does the Unit UT139S Digital Multimeter \| TRMS Industrial Tester cost, and is it available for purchase?

The price is 78.75 € (valid at the time of publication and already includes all taxes). The item is available for order — 10 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 Wednesday 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, Installment. All transactions are 100% secure and encrypted.

### Can Unit UT139S Digital Multimeter \| TRMS Industrial Tester be purchased with a lease?

Yes, the purchase is available both on credit and with an interest-free installment plan. Learn more about installments and credit options: https://aio.lv/en/payment#b3

### 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/11274946/63883793_large.webp