World Leaders of Replacement Parts and Test Instruments For the HVAC/R, Heating, Ventilation, Air Conditioning & Refrigeration Industries.

SIL is operating since 1973 in developing and manufacturing Electrical and Electronic Relays for HVAC Compressors, Protecting devices for Electrical Motors, Appliances, Temperature Monitoring and Logging devices.
SIL, together with SUPCO, was the first company in the world introducing the PTC starting relays to the HVAC Industry, which is used today by all compressor manufacturers.
SIL is Approved of ISO9001:2000 for R&D and Production. Our products are UL and ISA approved and complies with CE and Rohs directives.
Since 1990 SIL operates as the International distributor for the SUPCO and SIL product line for Europe and Asia. 
We are dedicated to obtain the best service and quality to our customers. We are operating a shipping logistic facility and we can ensure prompt delivery for most of the products in our catalog to every location around the world.
SIL has its own services and repair laboratories operated by skilled personnel.
Among our customers are major OEM, Distributors and service companies In the HVAC industry.
SIL and SUPCO employees are dedicated at all times to ensure the best service to our customers around the Globe. .

SUPCO has been a manufacturer of precision electronic Test, Service Instruments and Refrigeration & Air Conditioning components since 1945.

We are dedicated to produce high quality, innovative products at affordable prices to a wide range of customers.
We have been able to accomplish an excellent growth record in all areas of business through continuos improvements in design, automation, customer service and quality. SUPCO has two locations, in the United States and abroad. We have a network of knowledgeable representatives throughout the world, and our Customer Service Department is capable of responding immediately to your needs.
USA based in-house engineering and production allows us to address needs of various Original Equipment Manufacturers. We are equipped with the latest Surface Mount Equipment and are able to produce small and large quantities of our products at very competitive prices.
Most of our instruments are tested and calibrated according to the US National Institute of Standards and are available with a corresponding certificate of calibration.

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