# Insulation Resistance Tester Unit UT501A — up to 1000V, 200 GΩ range

**URL:** https://aio.lv/en/product--unit-ut501a--11631268
**Data updated:** 2026-05-19 11:52 (EEST)
**Category:** Measuring tools
**Manufacturer:** Unit
**Manufacturer code:** UT501A
**EAN:** 6935750550113
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 60.49 €
**Prices and availability valid until:** 2026-07-26 23:59
**Price without VAT (21%):** 49.99 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--unit-ut501a--11631268

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 10.07.2026 | free |
| Pickup points | 15.07.2026 | 1.89 EUR |
| Courier delivery to door | 15.07.2026 | 4.99 EUR |

## Summary description

The Unit UT501A is an insulation resistance tester designed for measuring insulation integrity with test voltages up to 1000 V and a maximum resistance range of 200 GΩ. It serves electricians and technicians for troubleshooting, preventive maintenance and safety checks on cables, motors, transformers and electrical installations. Compact and portable, it provides clear resistance readings to help verify insulation condition and reduce downtime.

## Long description

UNI-T UT501A insulation resistance tester is a handheld instrument for measuring insulation integrity in electrical equipment and installations. The UT501A measures insulation resistance, AC voltage and low resistance, and provides PI (polarization index) and DAR (dielectric absorption ratio) tests. The instrument features a 2,000-count LCD with backlight, automatic range selection, overload and low-battery indication, automatic discharge and automatic shutdown, and is CE and UKCA certified.
Advantages
The UT501A combines multiple measurement modes in a compact, robust housing that is suitable for field and industrial use. It supports continuous measurement with audible and visual alarms, automatic resistivity calculations, low-resistance zeroing and a continuous low-value resistance mode. These functions improve measurement accuracy and make the tester suitable for detailed diagnostics and maintenance of transformers, motors, cables and other high-voltage equipment.
Suitable for
Insulation testing of cables and wiring
Maintenance and diagnostics of transformers, motors and generators
Routine safety checks in residential and industrial installations
Verification of insulation after repairs or installation
Key specifications
Test voltages: selectable ranges up to 1000 V (100 V, 250 V, 500 V, 1000 V; additional ranges including 2500 V for some modes)
Insulation resistance range: from 0 MΩ to multi-GΩ (up to tens of GΩ depending on test voltage)
Display: 2000-count LCD with backlight, display area 70.6 × 34 mm
Low resistance measurement: 0.01 Ω – 200 Ω (approx. 5 V, \>200 mA)
AC voltage measurement: 30 V – 750 V (typical accuracy ±(2%+3))
Short-circuit current: \<2 mA
Audible alarm and visual warning light for continuous measurement mode
Automatic discharge and overload indication
Power supply: 6 × 1.5 V batteries (LR6)
Dimensions and weight: approx. 150 × 100 × 71 mm, 500 g
How to use
Connect the test leads to the device and to the object under test following safety rules for high-voltage insulation testing. Select the required test voltage and measurement function (insulation resistance, PI, DAR or low resistance). Start the test and monitor readings on the backlit LCD; the instrument will sound an alarm and show a red warning light in continuous measurement or alarm conditions. After testing, allow the automatic discharge function to operate or manually discharge the tested object before disconnecting the leads.
Usage recommendations
Use the UT501A in accordance with safety standards for insulation testing: ensure the circuit is de-energized, follow personal protective measures for high-voltage work, and confirm correct test voltage selection for the equipment under test. Store batteries and leads according to the manual and verify calibration periodically to maintain measurement accuracy.

## FAQ

### How much does the Insulation Tester Unit UT501A 1000V 200GΩ cost, and is it available for purchase?

The price is 60.49 € (valid at the time of publication and already includes all taxes). The item is available for order — 274 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 10.07.2026 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/11631268/66853529_large.webp