Selectronix, Inc.

Woodinville, WA

A Custom Product Development and Design Consulting Company


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Step Controllers - Series 4000
Superstep Series 4000 Sequencing Proportional Load Controllers are microcontroller-based, all solid-state units for use in staged electric heating, steam and hot water boilers,  and other control systems.  
It has time-saving, integral test features, standard voltage and current ranges, and has a User-Defined input range for custom configurations. 

Step Controllers - 2100 Series
Superstep 2100 series of Sequencing Proportional Load Controllers are all solid-state units for use in staged electric heating systems, such as hot water and steam boiler systems. 

Competitive Cross-Reference

Temperature Controllers and Parts
Genuine Honeywell replacement parts and accessories.  Product information and application notes.

Sealbar Control Board   

The SealBar Control Board is a custom product used to control the cutting and welding wires for plastic packaging systems.


Motor Field Regulator    


The Motor Field Regulator System is a solid-state replacement for the Westinghouse Silverstat current regulator, used to control the main motor current in Diesel-Electric propulsion motors.    They were originally designed for the US Coast Guard's Class B (Mesquite) and Class C (Iris).  All the 180' buoy tenders were decommissioned by 2006, being replaced by the 225' Juniper Class tenders.  Several ships were sold and the Selectronix Motor Field Regulator System continues to serve in other countries, including Nigeria and Ghana.


Other custom products have included:

bulletElectronic Valve Sequencing Controller for Dual Fuel Diesel/LNG Engines:           

We provide software services and some of the mission-critical electronic assemblies for the engine control and monitoring system!


bulletUSB Human Interface Device.
bulletInterface Controller for machine automation.
bulletDay-parting channel changer for DMX music service set-top decoder.
bulletUltrasonic liquid-level tank measurement device.
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Last modified: September 01, 2017