OJ Electronics Ltd

OJ ELECTRONICS LTD have consistently provided innovative temperature control to the electric and hydronic underfloor heating market for over 40 years.  Our products are renowned for their quality, functionality, reliability, design and intuitive operation. 

Headquartered in Denmark, we have an extensive in-house R&D division with state-of-the-art production facilities.  Mastering all the work processes, ensures consistent high quality and full control.

We provide a range of WATERBASED UNDERFLOOR HEATING CONTROLS; from simple manually mixed systems to highly sophisticated remote sensing and automated systems accessible via the internet.


Our Waterline Master System has been designed to meet all the customer’s requirements in an underfloor heating, and heating & cooling installation, in either a STANDALONE or NETWORKED solution.  For commercial installations, we have a Trend® BMS interface with plug and play component, capable of controlling up to 16 manifolds per network.  For domestic non-BMS installations, we will soon be launching our Floor Management System, allowing users to control their underfloor heating systems using wireless technology.

Our ELECTRIC FLOOR HEATING thermostats provide precise control; from basic on/off operation through to fully programmable.  Our new Comfort System4TM allows up to 16 zone control with wireless thermostats controlled from a central location.


We cannot change the weather – but we do control the consequences – see our range of controllers for ICE AND SNOW MELTING for use in gutters, ramps and ground areas.

We have a full range of controls for HEATING, VENTILATION AND AIR CONDITIONING; from web based controllers to pressure transducers and thyristor stage heating controllers.  The product range is wide; from 2-stage thermostat control to sophisticated controllers.


Our controls, your solution

OJ Electronics Ltd
01985 213003

Product List

  • Thermostats
  • Sensors
  • Controllers - Hydronic
  • Controllers - Electric
  • Pressure Transducers
  • Power controllers
  • Water Detection controller
  • Fire detection controller
  • Mixing Valves & Actuators
  • Humidity sensors
  • Temperature Sensors
  • Wall mount thermostats
  • Duct mounted sensors
  • Clock thermostats