# Power meter ORNO OR-WAT-435/B — single-phase energy monitor for household electrical measurements

**URL:** https://aio.lv/en/product--orno-or-wat-435b--10856819
**Data updated:** 2026-03-11 11:56 (EET)
**Category:** Measuring tools
**Manufacturer:** ORNO
**Manufacturer code:** OR-WAT-435/B
**EAN:** 5908254827945
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 17.99 €
**Prices and availability valid until:** 2026-08-04 23:59
**Price without VAT (21%):** 14.87 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--orno-or-wat-435b--10856819

## 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

ORNO OR-WAT-435/B is a single-phase power/energy meter designed for household electrical measurements. It records electrical parameters such as consumed energy and instantaneous power for load monitoring and cost tracking. Suitable for installation in domestic circuits to monitor appliance consumption, detect abnormal usage, and aid energy-saving decisions.

## Long description

ORNO OR-WAT-435/B is a single-phase power and energy monitor intended for household electrical measurements. The device measures and records consumed energy and instantaneous power, providing basic monitoring of electrical loads in domestic circuits. Designed for mounting in distribution boards, it helps identify appliance consumption patterns and supports tracking of energy use and costs.
Advantages
The OR-WAT-435/B provides continuous measurement of active power and cumulative energy consumption with a compact DIN-rail compatible design suitable for residential switchboards. It delivers straightforward digital readouts that allow users to compare consumption across devices and time periods. Installation requires standard single-phase wiring and the unit operates without complex configuration, making it practical for routine household energy monitoring.
Suitable for
 Monitoring electricity consumption of household appliances
 Detecting abnormal or unexpected power draw in domestic circuits
 Tracking energy use to estimate operating costs
 Integrating into single-phase distribution boards for centralized measurement
Key specifications
 Measurement type: single-phase active power and energy
 Displayed values: instantaneous power and cumulative energy
 Mounting: DIN-rail compatible for distribution board installation
 Intended environment: household/residential electrical circuits
 User interface: digital display for direct reading
How to use
Install the OR-WAT-435/B in the household distribution board on a DIN rail and connect it to the single-phase line and neutral according to the wiring diagram supplied with the unit. After powering the circuit, the display shows instantaneous power and counts accumulated energy. Use the readings to log consumption over chosen intervals or to compare usage between appliances. Follow local electrical safety standards and switch off power before wiring; installation should be performed by a qualified electrician if you are not experienced with mains wiring.
Usage recommendations
Place the meter in an accessible position within the distribution board to allow periodic reading. Verify connections after installation and periodically check the device for correct operation. Use consumption data to identify high-use devices and plan energy-saving measures; ensure the meter is used only within its specified single-phase residential parameters.

## FAQ

### How much does the ORNO OR-WAT-435/B power meter cost, and is it available for purchase?

The price is 17.99 € (valid at the time of publication and already includes all taxes). The item is available for order — 8 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/10856819/60231196_large.webp