Welcome to the new Capricorn Controls Ltd website.


At Capricorn Controls we pride ourselves on designing, sourcing and the manufacture of quality reliable products and parts for a wide range of industries including; Power Generation, Engine Applications, Transport Refrigeration, Control Panels, Battery Charging, packaging industry, Battery backed systems, welfare and Caravan & Leisure.

Auto start Variations

Standard Products

Standard products include;

  • Key start
  • Remote start
  • Start on demand
  • Auto-transfer
  • Mains failure
  • annunciators
  • Battery chargers
  • Power supplies and battery backed DC systems
  • Relay assemblies
  • Timers and real time clocks
  • Frequency, speed, voltage, current and temperature monitors
  • Key-switches
  • Magnetic pick-ups
  • Connectors
  • Automotive relays


Control and monitoring products designed by us for a wide range of engine applications. These including generating sets, pump sets, welfare cabins, groundwork, Jetting equipment and many special projects.

Power supplies & battery backed DC systems

These two standard products meet most customer requirements

The UDS155 Un-interrupted DC Supply is a self-contained system, simply mount into a control panel, connect and go. It is available in 12, 24, 30 and 48V versions and provides 7AHr or 12AHr battery backup. The 100W power supply maintains the standing load independent of the temperature compensated battery charger. See also the UDS060 for smaller requirements.

The RHA series ‘Rectifier Heatsink Assemblies’ provide the central building block for higher powered systems. Two 70A blocking diodes are included together with the Low Battery (voltage) and Charge Failure monitoring. Each monitoring circuit has its own alarm relay with volt-free contact set and LED status indicator. Switch mode charger units are added to makeup the power supply and charger ratings required. Low voltage battery disconnect is a recommended option.

Loom Assemblies

We design and manufacture loom assemblies for a wide range of industries and applications, from marine engines to jetting sets and anything in-between.

The WKS96 controller with integral engine loom is purpose designed for use in rugged applications including jetting machines and hire equipment. These controllers and loom assemblies are available to suit a variety of engines and applications with custom builds to order.

engine wiring loom

Battery Charging

Offering a wide range of battery chargers from switch mode to our own BCX03 series, which was first produced in 1989. This has remained a firm favourite as a cost effective solution for small AMF sets with little or no standing load. The BCQ series followed with current limiting and charge fault option making these a good choice for most battery types, including NiCads.

Other Projects

Bespoke products of our design and manufacture can be found in a number of military, Naval, Nuclear and medical applications. Small panels can be assembled with our units ready to be installed on location.

Frequency monitor

During the Covid pandemic we were tasked with producing a control panel for the running of mobile testing units, due to the time sensitive nature we pooled all our resources and had fully tested production units within a couple of weeks which led to supplying 100’s of units in just a couple of months.

Covid welfare cabin controller

Heat Seal Controls

Seal Control Modules are purpose designed for form-fill, film and bag sealing equipment as used in the packaging industry. Sometimes referred to as ‘temperature simulators’ because they control the weld time according to the frequency of operation by simulating the amount of heat retained in the tool.

Heat Sealers

Designed by one of our old customers Graham Lee (GL60), later adapted and improved by Capricorn Controls Ltd. The GL1200 sealers have been used in numerous industries for the safe disposal of contaminated materials, particularly filters and glove boxes. The compact design and removable top jaw enables the user to take the sealer to the contaminated material and place the bag appropriately for a safe airtight seal. The sealers are currently available with a 1200mm sealing length, other sizes are available please see product page. Battery powered controllers are also available to make the heat sealer fully portable.


We offer a wide range of quality batteries including Lithium, AGM, NiCad and data centre system batteries at very competitive prices. Popular types and sizes are normally available from stock, for next working day delivery.

Caravan accessories & leisure

Caravan accessories include chargers & water tanks, together with innovative products designed and manufactured at our Banbury factory.

  • STOP LIGHT CHECKER – visually check trailer lights single handed
  • ULTRA-VANSTAT – Domestic style, programmable wireless thermostat
  • WATER WIZARD – No more interrupted showers

We were selected to produce LED strings for marquee star cloths and eventually the controller to run the curtains and can produce similar for your needs.