# Voltage Tester Unit UT18D CATIII CATIV — Non-Contact Voltage Detector and Multimeter Functions

**URL:** https://aio.lv/en/product--unit-ut18d--10629486
**Data updated:** 2026-04-16 13:22 (EEST)
**Category:** Measuring tools
**Manufacturer:** Unit
**Manufacturer code:** UT18D
**EAN:** 5901890018319
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 46.99 €
**Prices and availability valid until:** 2026-07-28 23:59
**Price without VAT (21%):** 38.83 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--unit-ut18d--10629486

## 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

Unit UT18D is a voltage tester with CATIII and CATIV safety ratings, combining non-contact voltage detection and basic multimeter functions. It detects AC voltage without contact, measures continuity and polarity, and provides visual/audible indication for electrical troubleshooting, installations and maintenance in residential and light commercial environments.

## Long description

The Unit UT18D CATIII CATIV — Non-Contact Voltage Detector and Multimeter Functions is a compact handheld voltage tester designed for basic electrical troubleshooting, installation checks and routine maintenance. The tester combines non-contact AC voltage detection with simple multimeter capabilities such as continuity and polarity checks. With CATIII and CATIV safety ratings, it is intended to be used in environments where enhanced transient protection is needed.
Advantages
The UT18D offers non-contact voltage detection for rapid identification of live conductors without requiring direct contact, reducing the need to expose bare wires. It integrates basic multimeter functions—continuity and polarity checks—so users can perform quick diagnostics without carrying multiple instruments. Visual and audible indicators simplify the interpretation of results, and the compact, ergonomic design makes the tester easy to operate in tight spaces.
Suitable for (tasks / use cases)
 Detecting AC voltage on cables, outlets and switches without direct contact
 Basic continuity checks for fuses, wires and simple circuits
 Polarity verification on connectors and wiring
 Routine electrical maintenance in residential and light commercial settings
 Quick on-site troubleshooting by electricians, technicians and DIY users
When it may not be suitable
The UT18D provides essential non-contact voltage detection and basic multimeter functionality but is not a substitute for a full-featured digital multimeter when advanced measurements (true RMS voltage, current, resistance over wide ranges, frequency, capacitance, temperature, etc.) are required. For precision diagnostics, detailed logging or measurements under industrial conditions beyond CATIII/CATIV ranges, a specialized instrument should be used.
Key specifications
 Functionality: non-contact AC voltage detection, continuity check, polarity indication
 Safety categories: CATIII and CATIV rated for enhanced transient protection
 Indicators: visual LED indication and audible tone for detection and continuity
 Form factor: compact handheld design suitable for one-handed operation
 Typical applications: outlet, cable, switch testing; basic wiring checks
How to use
To use the UT18D, power the unit according to the manufacturer's instructions and select the required mode if applicable. For non-contact voltage detection, bring the sensing tip near the conductor, outlet or device under test and observe the visual LED and listen for the audible indicator to confirm presence of AC voltage. For continuity testing, place the probes or contacts on the circuit points being tested and look for the continuity tone and indicator. For polarity checks, connect the tester to the conductor or connector and read the polarity indication. Always follow safe working practices and verify operation on a known live source before use.
What to consider before purchase
 Confirm that non-contact voltage detection and basic continuity/polarity checks meet your diagnostic needs
 Verify that CATIII/CATIV safety ratings cover the environments where you will work
 Consider whether you need advanced multimeter functions not provided by this tester
 Check power requirements and battery type for field use duration
Usage recommendations
Use the UT18D as a first-line tool for safe, rapid identification of live conductors and simple wiring checks; always complement its findings with a full multimeter or additional testing when precise measurements or in-depth diagnostics are required. Observe recommended safety distances and personal protective equipment when testing live circuits.

## FAQ

### How much does the Voltage Tester Unit UT18D CATIII CATIV cost, and is it available for purchase?

The price is 46.99 € (valid at the time of publication and already includes all taxes). The item is available for order — 200 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/10629486/54389988_large.webp