# Electric energy meter ORNO OR-WE-521 single-phase 40A MID pulse output backlight 1-module

**URL:** https://aio.lv/en/product--orno-or-we-521--11046018
**Data updated:** 2026-03-11 11:58 (EET)
**Category:** Sensors & Detectors
**Manufacturer:** ORNO
**Manufacturer code:** OR-WE-521
**EAN:** 5908254801860
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 22.49 €
**Prices and availability valid until:** 2026-08-04 23:59
**Price without VAT (21%):** 18.59 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--orno-or-we-521--11046018

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 23.07.2026 | free |
| Pickup points | 28.07.2026 | 1.89 EUR |
| Courier delivery to door | 28.07.2026 | 4.99 EUR |

## Summary description

Single-phase electric energy meter ORNO OR-WE-521 for measuring active energy in residential and small commercial installations. Rated up to 40 A, MID-compliant for legal metrology, with pulse output for remote reading and backlit display for visibility. DIN-rail 1-module housing designed for distribution boards and energy monitoring applications.

## Long description

The ORNO OR-WE-521 single-phase electric energy meter is designed for accurate measurement of active electrical energy in residential and small commercial installations. Housed in a 1-module DIN-rail enclosure, this meter supports currents up to 40 A and complies with MID requirements for legal metrology. The device includes a backlit display for improved readability in low-light environments and a pulse output for integration with remote monitoring or data logging systems.
Advantages
This meter provides MID-compliant accuracy for billing or verification purposes and a compact 1-module DIN-rail form factor for easy installation in distribution boards. The backlit display ensures clear visibility of readings at any time, while the pulse output enables connection to energy management systems or external counters. Designed for single-phase networks, the device balances compact size with functional features needed for everyday energy monitoring.
Suitable for
Residential apartment and house energy monitoring
Small commercial premises and light commercial installations
Integration with remote data loggers and building energy management systems
Installation in distribution boards and meter cabinets with DIN-rail mounting
Key specifications
Type: Single-phase active energy meter
Rated current: up to 40 A
Accuracy class: MID-compliant for legal metrology
Output: Pulse output for remote reading and data acquisition
Display: Backlit display for improved readability
Mounting: 1-module DIN-rail housing for distribution boards
How to use
Install the meter on a standard DIN rail inside the distribution board following local electrical regulations. Connect the line and neutral conductors to the meter terminals and ensure the connections are tightened to the recommended torque. Connect the pulse output to the input of your data logger or monitoring device according to the external device requirements. After commissioning, verify correct wiring by checking the display and confirming that the meter registers consumption during load changes.
Usage recommendations
Place the meter in a dry, ventilated enclosure and protect it from direct exposure to water or corrosive atmospheres. Ensure the installation is performed by a qualified electrician and that all connections comply with applicable standards. For remote reading use shielded wiring for the pulse output if routed near high-voltage or noisy circuits to minimize interference.

## FAQ

### How much does the ORNO OR-WE-521 single-phase 40A energy meter cost, and is it available for purchase?

The price is 22.49 € (valid at the time of publication and already includes all taxes). The item is available for order — 22 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 23.07.2026 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 ORNO 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 ORNO 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/11046018/65888639_large.webp