# Digital multimeter Unit UT133B CAT III with diode test, handheld electrical tester

**URL:** https://aio.lv/en/product--unit-ut133b--11274945
**Data updated:** 2026-05-22 07:20 (EEST)
**Category:** Measuring tools
**Manufacturer:** Unit
**Manufacturer code:** UT133B
**EAN:** 6935750513323
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 20.99 €
**Prices and availability valid until:** 2026-07-04 23:59
**Price without VAT (21%):** 17.35 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--unit-ut133b--11274945

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 19.06.2026 | free |
| Pickup points | 26.06.2026 | 1.99 EUR |
| Courier delivery to door | 26.06.2026 | 4.99 EUR |

## Summary description

Unit UT133B is a handheld digital multimeter rated CAT III designed for measuring electrical parameters and performing diode tests. It provides essential functions for electricians and technicians, such as voltage, current and resistance measurements and diode verification. Suitable for troubleshooting, installations and routine maintenance, it offers practical on-site diagnostics.

## Long description

The Unit UT133B is a compact, handheld digital multimeter engineered for reliable electrical measurements in various environments. Rated for CAT III safety, this device is designed to assist professionals and hobbyists in accurately measuring voltage, current, and resistance. Its robust construction and intuitive interface make it a dependable tool for verifying electrical circuits and performing essential diagnostic tasks.
Advantages
This multimeter stands out due to its ergonomic design, which allows for comfortable one-handed operation during field work. The device provides high-precision readings for a wide range of electrical parameters, ensuring that users can identify issues quickly and effectively. Its integrated diode test function adds versatility, allowing for the rapid assessment of semiconductor components. The clear display ensures visibility in different lighting conditions, while the durable casing protects the internal components from the rigors of daily use in professional settings.
Suitable for
Electrical troubleshooting and circuit diagnostics
Routine maintenance of household and industrial appliances
Installation and testing of electrical wiring
Verification of diode functionality in electronic components
When it may not be suitable
This device is not intended for high-voltage industrial environments exceeding its CAT III rating. It may also lack the advanced logging or connectivity features required for complex laboratory data analysis or specialized automotive diagnostic systems.
Key specifications
Measurement categories: CAT III
Functions: Voltage, current, resistance, and diode test
Display type: Digital LCD
Design: Handheld, portable
How to use
To begin using the multimeter, 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 on the front panel. Ensure the circuit is de-energized before connecting the leads for resistance or diode testing. Once connected, observe the reading on the digital display. Always ensure the device is set to the correct range if not using an auto-ranging feature, and disconnect the leads safely after completing your measurements.
What to consider before purchase
Verify that the CAT III rating meets your specific safety requirements
Confirm the measurement ranges align with your typical electrical tasks
Check if the device includes the necessary test leads for your applications
Usage recommendations
Always inspect the test leads for any signs of damage or wear before each use to ensure operator safety. Store the multimeter in a dry, cool environment when not in use to maintain the longevity of the electronic components.

## FAQ

### How much does the Multimeter Unit UT133B CAT III cost, and is it available for purchase?

The price is 20.99 € (valid at the time of publication and already includes all taxes). The item is available for order — 55 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 19.06.2026 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/11274945/63883792_large.webp