South Africa's leading Eco Store - Need Assistance? 0861 661 326 or Click Here


SR81 Electronic 12V Thermal Controller

The Intelligent Controller SR81 (Updated Version SR868C8) is used on split solar heating systems, it can show the temperature of water in the tank, the option of temperature difference, gives you frost protection and protection of memory and anti-bacteria.

Applications Capacity

  • Max. Number of collectors: 1.Max. Number of storage tanks: 1.
  • Max. Number of relays: 4.
  • Max. Number of sensors: 3.
  • Max. Number of visualization application system: 1.
  • FRT: 1 x Rotary vane type electron flow meter.

Please note this version of the of the SR81 only has 2 (1+1) inputs for the PT1000 and NTC 10k temperature sensors available, unlike the 5 inputs stated in the manual received with item.

Sign up for price alert

Regular Price: R 2,188.00

Special Price Excl. Tax: R 1,444.35 Incl. Tax: R 1,661.00


Our online Payment Gateway, PayU, offers 100% secure payments online. We also accept payment via EFT or Snapscan.

Secure local and international deliveries with excellent courier partners. Free delivery in Cape Town for R 500 orders or more.

Need Help? With over 15 years experience in the industry we are the right people to ask. Contact us now.

Product Description


Technical data

  • Power supply: 12V ~ (50…60Hz).
  • Rated impulse voltage: 2.5KV.
  • Housing: Plastic ABS.
  • Mounting: Wall mounting.
  • Accuracy of temperature measuring: ± 0.1°C
  • Range of collector temperature measuring: -10°C ~220°C
  • Range of tank temperature measuring: 0°C ~110°C
  • Suitable power of pump: 3 pump possible to be connected.
  • Operation: 10 push buttons at the front cover.
  • Protection type: IP40.
  • Dimension of display: 120mm*120mm*18mm.
  • Dimension of controller board with 3000W output: 218mm*165mm*55mm.

Note: there are 4 inputs for NTC10K, B=3950 temperature sensor, but only 1 sensor are included in the standard delivery Pack; the other two should be purchased
separately by customer if necessary. An ITS Solar and Heat Pumps NTC10K Micro sensor is required for all retro fit and is not included as standard.

Additional Information

Additional Information

Disclaimer Please note that stock availability is subject to prior sales. Prices exclude delivery. The image serves as an example of what the product looks like and may differ slightly in appearance.
Guarantee/ Warranty 2 year product warranty


Write Your Own Review

Only registered users can write reviews. Please, log in or register

Product Tags

Product Tags

Other people marked this product with these tags:

Use spaces to separate tags. Use single quotes (') for phrases.