# Lumel RE81 Temperature Controller for PT100 Sensors -50 to 100°C, Relay Output, 2 Alarm Relays, 230VAC

**URL:** https://aio.lv/en/product--lumel-re81-01100p0--12472777
**Data updated:** 2026-05-18 09:41 (EEST)
**Category:** Control Systems
**Manufacturer:** Lumel
**Manufacturer code:** RE81 01100P0
**EAN:** 5901769461758
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 148.99 €
**Prices and availability valid until:** 2026-07-28 23:59
**Price without VAT (21%):** 123.13 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--lumel-re81-01100p0--12472777

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 16.07.2026 | free |
| Pickup points | 21.07.2026 | 1.89 EUR |
| Courier delivery to door | 21.07.2026 | 4.99 EUR |

## Summary description

The Lumel RE81 is a precise temperature controller designed for PT100 sensors with a measurement range of -50 to 100°C. It features a main relay output and two additional alarm relays for enhanced process control. Operating on 230VAC 50/60Hz, this industrial-grade device is ideal for monitoring and regulating thermal processes in various automation applications, ensuring reliable performance and accurate temperature management.

## Long description

The Lumel RE81 is a high-precision temperature controller engineered specifically for use with PT100 resistance temperature detectors. This industrial-grade device provides reliable thermal regulation within a measurement range of -50 to 100°C, making it a robust solution for diverse automation environments. Equipped with a primary relay output and two dedicated alarm relays, the controller offers comprehensive process management and safety monitoring capabilities, operating efficiently on a 230VAC power supply.
Advantages
The primary benefit of the Lumel RE81 lies in its specialized design for PT100 sensors, which ensures high measurement accuracy and stability in critical thermal processes. The inclusion of two independent alarm relays provides an essential layer of safety, allowing users to configure setpoints for over-temperature or under-temperature alerts. Its compact and durable construction is optimized for industrial panels, ensuring long-term reliability and consistent performance even in demanding operational conditions.
Suitable for
Industrial heating and cooling systems
Food processing and storage equipment
HVAC climate control applications
Laboratory thermal management
Automation systems requiring precise temperature regulation
When it may not be suitable
This controller is not designed for applications requiring high-speed PID control for extremely fast-changing thermal processes. It is also unsuitable for environments where the sensor type is not a PT100 or where the required temperature range exceeds the specified -50 to 100°C limit.
Key specifications
Sensor compatibility: PT100
Temperature range: -50 to 100°C
Output: 1 main relay, 2 alarm relays
Power supply: 230VAC 50/60Hz
Application: Industrial automation
How to use
Installation should be performed by qualified personnel according to the provided wiring diagram. Connect the PT100 sensor to the designated input terminals and ensure the 230VAC power supply is correctly wired to the power input. Once powered, use the front panel interface to set the desired temperature setpoint and configure the alarm thresholds for the two auxiliary relays. Regularly verify that the sensor connection is secure to maintain measurement accuracy.
What to consider before purchase
Ensure your sensor is a PT100 type
Verify that your process temperature stays within the -50 to 100°C range
Confirm that your control system supports 230VAC relay switching
Check panel space requirements for installation
Usage recommendations
Always ensure that the sensor probe is properly insulated and protected from direct contact with corrosive substances to extend the lifespan of the PT100 element and maintain consistent controller performance.

## FAQ

### How much does the Lumel RE81 Temperature Controller for PT100 Sensors cost, and is it available for purchase?

The price is 148.99 € (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 16.07.2026 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 Lumel RE81 Temperature Controller for PT100 Sensors 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 Lumel 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 Lumel 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

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