Caltronix, Inc. maintains an approved supplier network of manufacturers and third party calibration companies for those hard to service niche instruments (flow, light, sound, vacuum, vibration etc.). This allows us to help you control the size of your approved supplier base and those costly purchase orders. Customers are always notified and quoted for approval prior to sending any equipment out to one of our approved vendors for service. All supplier calibration documentation is reviewed by our quality department to ensure compliance to all applicable quality standards.