Test Weights
Sales, service, and design of custom and standard calibration weights. Let us take the worry and hassle out of calibration by putting the responsibility in our hands.
http://www.testweights.com

Gram Precision
Balances, calibration weights and scales for laboratory and industrial applications
http://www.gramprecision.com/

Denver Instrument
Manufactures a line of laboratory equipment including balances and calibration weights.
http://www.denverinstrument.com/index.html

Watermark
SeaSoft Scuba develops new, creative, and imaginative diving equipment that withstand the test of time and are loved by divers worldwide. Our products increase your enjoyment, comfort and safety while exploring the wonders of the underwater world.
http://www.watermark1.com/

NIST Office of Measurement Services
index230 - This will be the new external home page for MSD
http://ts.nist.gov/MeasurementServices/230.cfm

Denver Instrument - Precision weighing instruments since 1880
Denver Instrument manufactures a line of laboratory equipment including balances pH meters titration systems, moisture analyzers and calibration weights.
http://www.denverinstrumentusa.com

Wheel Weights International
Manufactures wheel balancing weights of any standard size of coated and uncoated, clip-on and adhesive.
http://www.wheelweightsintl.com/

Hitek Calibration Services
Calibration Equipment and electronic testing services - HITEK Calibration
http://www.hitek.co.uk

Self Calibration Resource Center
Self-Calibration for high precision metrology
http://www.selfcalibration.com/

Calibration Laboratory
Process Instruments has provided instrument repair and test equipment calibration services since 1964. Process Instruments specializes in supporting Honeywell and Leeds and Northrup products. Process Instruments sells discontinued instrumentation by all major USA manufacturers, and both instruments and spare parts by Honeywell and L&N. Process Instruments designs, builds, installs and maintains control systems for all processes.
http://www.callab.net