+ We stock a large inventory of Sierra Instruments industrial automation systems and parts.
+ We repair, service and calibrate most Sierra Instruments models of equipment.
+ We ship Sierra Instruments replacement parts worldwide, with expedited shipping for your urgent Sierra Instruments requirements


For immediate assistance be sure to contact our Automation & Controls team:

Mr. Ryan Fitzgerald
Director, Industrial Automation & Controls Service Team
[email protected]
(212) 772-6992 ext. 704


Our staff at York Scientific is dedicated to help you succeed with all your mission-critical Sierra Instruments Industrial Automation equipment needs.

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Popular Industrial Automation Products:

Winter 2024 & 2025 Q1 Developments in Industrial Automation - expanded product offering and diagnostic and repair services at YorkXPS

Winter 2025 Update: Since December 2023 the supply chain strictures have fortunately eased, with less stress on product delivery due dates. Our teams at YORK XPS have been able to ramp up our service response times with expedited shipment schedules back to normal, providing replacement parts and services following normal response times. Our departments are now working on near-normal production levels and our delivery and service schedules back to regular operation levels. In addition to the Sierra Instruments 220-W4-E2-ST parts and service support, we have been able to add new lines of product and service:

Expanded Service and Repair Support for New Product Lines: We offer full support for discontinued Silicon-Control products, including obsoleted and phased-out Skf parts and systems, as well as the all-new for 2023 Skf product line-up. Starting Q1 2025 YORK is pleased to announce additional repair and rebuild services for the automation products made by industrial controls leader Silicon-Control such as the SVFOC020 spares. Related to this we have added to our service line-up the LLTHC15UTOP3TW298G manufactured by Skf and we are pleased to be able to service most Skf systems and parts. Due to increased demand we now feature 7321 by Manufacturer Skf as well.

York Scientific's New & Featured Automation Replacement Parts: Starting early January 2025 YORK has Allen-Bradley Brand SLC5001746A41746OB161203SM11746N2 in stock, original and quality replacement parts available for immediate dispatch to meet your requirement for spare replacements. Spare units by Georg-Fischer such as Signet388501P equipment made by Georg-Fischer have been added to our featured items. As a tip, you can find the entire Georg-Fischer products line-up in our inventory by simply searching for "Georg-Fischer" in the search box. Additionally we have now also available HMIIPC677C made by Siemens as well as the popular 802D42104B06K original spares produced by Sigma

Servo Motors, Spindles, and Electric Motors Rewinding and Rebuilding. We have expanded capacity at our service centers to do complete overhauls of industrial electric motors and spindles. Refurbishment processes are held to stringent QA standards to adhere to or exceed manufacturer's specifications. Overhauls include motor bearing replacement, stator rewinding, and rebalancing. Additional overhaul and rebuilding capabilities of products such as the SM233AELTQNDFM by Parker and Signet388501P spares by Georg-Fischer are also now also our York Scientific's line-up of service offerings. This also includes the original 63182ZC3 Spares made by industrial controls and automation manufacturer Skf.