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AB Controls is your greatest resource for all Invensys, Robertshaw, Siebe and Barber Colman parts. Don't see the part you want? Email us!



Invensys, Robertshaw, Siebe and

Barber Colman Parts

AB Controls stocks both old and new Siebe, Invensys, Robertshaw and Barber Colman controllers, sensors, relays, transducers, cable and more! If the part you want is not listed here, email us your request here Parts Request and we will access our ever growing resources and find you what you need.

 New and Used Controllers

Robertshaw, Siebe & Invensys Controllers

Barber Colman Controllers


Alerton, Andover, Automated Logic, Circon, Delta, Distech, Honeywell, Johnson Controls, Reliable, Siemens, Smart Controls, Trane, Voyant and more...




System Parts


Temperature, Humidity, Pressure... Sensors


Transducers, Power Supplies...




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Revised: 08/28/08.