# Siemens SIRIUS 3UG4501-1AW30 Level Monitoring Relay, 1 Changeover Contact, 5-100 kOhm

**URL:** https://aio.lv/en/product--siemens-3ug4501-1aw30--1792975
**Data updated:** 2026-05-18 02:46 (EEST)
**Category:** Sensors & Detectors
**Manufacturer:** Siemens
**Manufacturer code:** 3UG4501-1AW30
**EAN:** 4011209665309
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 128.99 €
**Prices and availability valid until:** 2026-08-01 23:59
**Price without VAT (21%):** 106.60 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--siemens-3ug4501-1aw30--1792975

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 21.07.2026 | free |
| Pickup points | 24.07.2026 | 1.89 EUR |
| Courier delivery to door | 24.07.2026 | 4.99 EUR |

## Summary description

The Siemens SIRIUS 3UG4501-1AW30 is a professional level monitoring relay designed for conductive liquids. It features a sensitivity range of 5-100 kOhm and is equipped with one changeover contact. This device ensures reliable monitoring of liquid levels in tanks and containers, providing essential automation control for industrial pump systems and fluid management applications.

## Long description

The Siemens SIRIUS 3UG4501-1AW30 is a high-precision level monitoring relay engineered for the reliable detection of conductive liquids. This industrial-grade device is specifically designed to manage fluid levels in tanks, reservoirs, and containers, ensuring consistent automation control for pump systems and various fluid management processes. By utilizing conductive measurement principles, it provides a stable and responsive solution for maintaining optimal liquid levels in demanding environments.
Advantages
This monitoring relay offers exceptional reliability and ease of integration into existing control cabinets. Its adjustable sensitivity range allows for versatile application across different types of conductive media, ensuring accurate detection even in varying conditions. The inclusion of a changeover contact provides flexible switching options, enabling seamless interaction with external alarm systems or pump motor starters. The robust design ensures long-term operational stability, reducing the need for frequent maintenance in industrial settings.
Suitable for
Monitoring conductive liquid levels in industrial tanks
Automating pump control systems for filling and emptying
Overfill protection for storage containers
Dry-running protection for pumps
This device is not suitable for monitoring non-conductive liquids such as oils, fuels, or high-purity distilled water, as these substances do not provide the necessary electrical conductivity for the sensor to function. Additionally, it should not be used in environments where the liquid may contain high concentrations of suspended solids that could interfere with electrode contact.
Key specifications
Sensitivity range: 5-100 kOhm
Output: 1 changeover contact
Function: Level monitoring for conductive liquids
Mounting: Standard DIN rail installation
To use the Siemens SIRIUS 3UG4501-1AW30, mount the relay onto a standard DIN rail within your control panel. Connect the appropriate conductive probes to the designated terminals, ensuring they are positioned at the required detection levels within the tank. Wire the changeover contact into your control circuit to trigger pumps or alarms based on the liquid level status. Once installed, adjust the sensitivity dial to match the conductivity of the specific liquid being monitored to ensure accurate switching performance.
What to consider before purchase
Verify that the liquid being monitored is electrically conductive
Ensure the sensitivity range of 5-100 kOhm is compatible with your specific fluid
Check the electrical load requirements for the changeover contact
Confirm space availability on the DIN rail within your enclosure
Ensure that the electrodes are kept clean and free of buildup to maintain consistent sensitivity and prevent false switching signals during operation.

## FAQ

### How much does the Siemens SIRIUS 3UG4501-1AW30 Level Monitoring Relay cost, and is it available for purchase?

The price is 128.99 € (valid at the time of publication and already includes all taxes). The item is available for order — 2 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 21.07.2026 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, Installment. All transactions are 100% secure and encrypted.

### Can Siemens SIRIUS 3UG4501-1AW30 Level Monitoring Relay be purchased with a lease?

Yes, the purchase is available both on credit and with an interest-free installment plan. Learn more about installments and credit options: https://aio.lv/en/payment#b3

### 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 Siemens 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 Siemens 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/1792975/47504455_large.webp