Harwood Engineering Co., Inc. - Walpole, MA
Manufacturer, Custom Manufacturer, Service Company
Manufacturer of pressure calibrators, pressure sensors & pressure transducers. Also calibration equipment & calibration services. Ranging from the most basic requirements to the ultimate in high precision workmanship.
harwoodeng.com/products/#_services

Hayes Instrument Service, Inc. - Billerica, MA
Distributor, Service Company
ISO 9001:2000 & ISO/IEC 17025 certified. Calibrating services for biotech/medical & mechanical/dimensional equipment including pressure gages & thermometers. Capabilities include calibration & repair for electrical, RF electronics, temperature & environmental equipment. Rental & leasing services are also available. ISO-10012, 10CFR Part 21 & QS 9000 compliant. Meets ANSI/NCSL Z540-1-1994 standards.
hayesinstruments.com/capabilities.pl

Toomey Associates, Inc. - Westfield, MA
Distributor, Custom Manufacturer, Service Company
ISO 9001:2000 certified. Calibration or calibrating services for pressure gauges from 15 psi to 50,000 psi & tension meters to 10,000 lbs. Calibration services are NIST traceable.
www.toomeyinc.com/service.htm

Cal-Tek Co., Inc. - North Billerica, MA
Distributor, Service Company
Calibrating services for pressure gage & thermometers. Capabilities include probes to 30K amps, air flow to 10,000 cu. ft. per minute, temperature to 1,200 degrees C & pressure gauges to 10,000 psi. ISO/IEC 17025:2005 certified. Compliant with ANCI, NCSL, MIL. & ISO 9002.

ESSCO Calibration Laboratory - Chelmsford, MA
Service Company
Pressure calibration capabilities up to 30,000 PSI include pressure gages, pressure tranducers & dead weight testers. Temperature calibration capabilities include thermometers, thermocuples, temperature controllers, temperature recorders, ovens, freezers, temperature calibrators, temperature baths & incubators. Temperature generation from -45 C to 600 C. Temperature measures from -200 C to 600 C. On site & A2LA accredited calibrations available.

MKS Instruments, Inc. - Andover, MA
Distributor, Manufacturer, Custom Manufacturer
Calibration services including pressure gage & thermometer calibration services. Types include pressure rate & flow rate calibration. Calibration standards include primary standard & transfer standard. Other services include CAD designing, 24/7 technical support including telephone troubleshooting & support, applications & installation assistance & NIST traceable calibration, repair, field services & training. ISO 9001:2000, ISO 14001: 2004, ISO/IEC 90003:2004 & OHSAS 18001:1999 compliant.