Skip to content

omni instruments | sensors and data acquisition equipment

Sales & Technical Support

  • +44 (0) 1382 443000
  • info@omni.uk.com
  • Home
  • Custom Systems
  • System Hires
  • About
  • Contact
  • Home
  • Custom Systems
  • System Hires
  • About
  • Contact
Products
  • Data Loggers
  • Displacement
  • Display & Control
  • Flow Meters
  • Gas Detection
  • Gyros & Accelerometers
  • Level & Distance
  • Load Cells
  • Pressure Sensors
  • Radio & GSM Telemetry
  • Remote Monitoring
  • Serial Ethernet & ModBus
  • Solar & Wind Power
  • Subsea & Offshore
  • Temperature and Humidity
  • Test & Calibration
  • Torque Transducers
  • Vibration Monitoring
  • Voltage & Current
  • Water Quality
  • Weather Instruments
  • Accessories
  • Data Loggers
  • Displacement
  • Display & Control
  • Flow Meters
  • Gas Detection
  • Gyros & Accelerometers
  • Level & Distance
  • Load Cells
  • Pressure Sensors
  • Radio & GSM Telemetry
  • Remote Monitoring
  • Serial Ethernet & ModBus
  • Solar & Wind Power
  • Subsea & Offshore
  • Temperature and Humidity
  • Test & Calibration
  • Torque Transducers
  • Vibration Monitoring
  • Voltage & Current
  • Water Quality
  • Weather Instruments
  • Accessories
  • Home
  • Custom Systems
  • System Hires
  • About
  • Contact
  • Home
  • Custom Systems
  • System Hires
  • About
  • Contact
Need Help?
£0.00 0 Basket
Product
  • Data Loggers
  • Displacement
  • Display & Control
  • Flow Meters
  • Gas Detection
  • Gyros & Accelerometers
  • Level & Distance
  • Load Cells
  • Pressure Sensors
  • Radio & GSM Telemetry
  • Remote Monitoring
  • Serial Ethernet & ModBus
  • Solar & Wind Power
  • Subsea & Offshore
  • Temperature and Humidity
  • Test & Calibration
  • Torque Transducers
  • Vibration Monitoring
  • Voltage & Current
  • Water Quality
  • Weather Instruments
  • Accessories
  • Data Loggers
  • Displacement
  • Display & Control
  • Flow Meters
  • Gas Detection
  • Gyros & Accelerometers
  • Level & Distance
  • Load Cells
  • Pressure Sensors
  • Radio & GSM Telemetry
  • Remote Monitoring
  • Serial Ethernet & ModBus
  • Solar & Wind Power
  • Subsea & Offshore
  • Temperature and Humidity
  • Test & Calibration
  • Torque Transducers
  • Vibration Monitoring
  • Voltage & Current
  • Water Quality
  • Weather Instruments
  • Accessories
£0.00 0 Basket
Home / Display & Control Products Signal Amplifiers / Novus Electronic Thermostats / N322S Electronic Thermostat For Solar Heating
N322S Electronic Thermostat For Solar Heating

N322S Electronic Thermostat For Solar Heating

The N322S Electronic Thermostat is designed solar water heating control. The main relay used to control the water circulation from the roof to storage tank. The display has the same options as the N322 but includes a differential controller that compares two different sensors, ensure water is only cycled from the solar collector to the storage tank when it is significantly higher than the storage tank, or activating back-up heating to maintain the hot water supply.

View Options

Need help finding the right product?

CONTACT US

Downloads

Flyer

N322 Electronic Thermostat

  • Description

Description

The Novus N322S is a high-efficiency differential temperature controller specifically engineered for solar water heating and thermal energy management. Designed to optimize heat transfer, the N322S monitors the temperature gradient between two independent NTC sensors, typically mounted at the solar collector and the storage tank, to intelligently activate the circulation pump only when a usable energy gain is detected. This dual-output unit provides a high-capacity 16A main relay for direct pump control and a secondary 3A auxiliary relay that can be configured for backup heating or safety alarms. With built-in protection logic to prevent pipe freezing in winter and system overheating in summer, the N322S is a robust, all-in-one solution for solar thermal installations, swimming pool heating, and industrial heat recovery systems.

Specifications

  • IP65 enclosure frontal protection when installed. Behind panel, IP42.
  • Outputs: 1 x SPDT Relay for 250vAC @ 16A, 1 x SPST Relay for 250vAC @ 3A.
  • Working temperature: 0 to 40°C @ 20 to 85%RH.
  • Power supply: 100-240vAC or 24vDC
  • Dimensions: 75 x 33 x 75mm (Width x Height x Depth)
  • Panel Cut Out: 70 x 29mm
  • Weight: 100g

 

Sensor NTC Thermistor
Type 10 kΩ @ 25 °C
Measurement Range -50 to +120°C
Accuracy 0.6°C (-19.9 to 99.9°C), or 1°C

Product

Ref

Price

Product Description

80322S3012

£47.87

N322S Electronic Thermostat for Solar Water Heating Control with a SPDT Relay Output (Max 250vAC @ 16A) and a SPST Relay (Max 250vAC @ 3A2. Differential controller that compares two temperature readings. Accepts NTC Thermistor Input. Measurement Range: -50 to +120°C (-58 to 248F), Accuracy 0.6°C between -19.9 to 99.9°C, 1°C elsewhere. Power Supply: 100-240vAC @ 5 Watts. Dimensions: 75 x 33 x 75mm. Panel cut-out: 70 x 29mm. Operation Temperature: 0 to 40°C. Polycarbonate Housing: IP42 | Front: IP65. Certifications: CE, UKCA, UL.
MORE INFO
Add to basket

80322S3312

£54.80

N322S Electronic Thermostat for Solar Water Heating Control with a SPDT Relay Output (Max 250vAC @ 16A) and a SPST Relay (Max 250vAC @ 3A2. Differential controller that compares two temperature readings. Accepts NTC Thermistor Input. Measurement Range: -50 to +120°C (-58 to 248F), Accuracy 0.6°C between -19.9 to 99.9°C, 1°C elsewhere. RS485 Modbus RTU Communications. Power Supply: 100-240vAC @ 5 Watts. Dimensions: 75 x 33 x 75mm. Panel cut-out: 70 x 29mm. Operation Temperature: 0 to 40°C. Polycarbonate Housing: IP42 | Front: IP65. Certifications: CE, UKCA, UL.
MORE INFO
Add to basket

80322S3314

£55.43

N322S Electronic Thermostat for Solar Water Heating Control with a SPDT Relay Output (Max 250vAC @ 16A) and a SPST Relay (Max 250vAC @ 3A2. Differential controller that compares two temperature readings. Accepts NTC Thermistor Input. Measurement Range: -50 to +120°C (-58 to 248F), Accuracy 0.6°C between -19.9 to 99.9°C, 1°C elsewhere. RS485 Modbus RTU Communications. Power Supply: 12-30vDC @ 5 Watts. Dimensions: 75 x 33 x 75mm. Panel cut-out: 70 x 29mm. Operation Temperature: 0 to 40°C. Polycarbonate Housing: IP42 | Front: IP65. Certifications: CE, UKCA, UL.
MORE INFO
Add to basket
8830000002 NTC Thermistor

8830000002

£6.16

NTC Thermistor Temperature Sensor. TPE Capsule (5 x 20mm) with m TPE Cable. Temperature Range: -50 to +120°C.
MORE INFO
Add to basket
8830000003 NTC Themistor

8830000003

£4.72

NTC Thermistor Temperature Sensor. Stainless Steel Capsule (5 x 30mm) with 3m TPE Cable. Temperature Range: -30 to +105°C.
MORE INFO
Add to basket

links

  • About
  • Contact
  • Custom Systems
  • Privacy & Cookies
  • Terms & Conditions

omni instruments

Omni Instruments Ltd,
Unit 1, 14 Nobel Road,
Wester Gourdie Industrial Estate,
Dundee, DD2 4UH, UK

Sales & Support

  • +44 (0) 1382 443000
  • info@omni.uk.com

Payments

mastercard-color
visa-color
amex-color
Copyright Omni Instruments 2026 | Design. Build. Host.

We are here to help

Need help with your products or have a question for us on our custom systems? Use the form below to send us a message and our experts will be in touch to help.

Call us on +44 (0)1382 443000

Enquire now