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From Palmer Wahl Instrumentation Group
Per National Bureau of Standards-NBS Monograph 90 Mercury separations commonly occur as a result of exposure to shock and rough handling during shipment. This condition can generally be corrected by carefully following the procedure below, which was developed by the National Bureau of Standards (now NIST). Please read the instruction completely before attempting the repair. Contact Palmer Instruments (800) 421-2853 if you have questions, or if we can assist you in any way. Many inquiries are received concerning separated mercury columns, particularly after shipment. Since no means of avoiding such occurrences has yet been found, the recourse of stating some directions for joining the mercury is adopted. The process of joining broken columns consists of one or a series of manipulations which may be effective, and these are briefly described here. Products & Services
Digital thermometers are portable temperature sensing devices that have permanent probes and a digital display.
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Learn more about Digital Thermometers
Laboratory thermometers are used to measure temperatures or temperature changes with a high degree of precision. Traditional liquid-in-glass design offers ease of use and low cost.
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Learn more about Laboratory Thermometers
Resistance temperature detector (RTD) temperature transmitters convert RTD resistance measurements to current signals, eliminating the problems inherent in RTD signal transmission via lead resistance.
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Learn more about RTD Temperature Transmitters
Thermocouple temperature transmitters convert the small millivolt output of a thermocouple to a current signal (typically 4-20 mADC) that is immune to noise and voltage drops over a long distance.
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Learn more about Thermocouple Temperature Transmitters
Thermistor temperature probes sense temperature by using thermistors, devices made of semiconductor materials which exhibit a large change in resistance for a small change in temperature.
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Learn more about Thermistor Temperature Probes
Product Announcements
Topics of Interest
NIST stands for National Institute of Standards and Technology. The institute is a government agency, which started out as the National Bureau of Standards (NBS) and changed its name in 1988. (Many...
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FIPS PUB 199
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FEDERAL INFORMATION PROCESSING STANDARDS PUBLICATION
Standards for Security Categorization of Federal Information and...
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10.1 OVERVIEW
10.1.1 Traceability to National Standards
Before discussing focused calibrations, we should review the purpose and process of instrument calibration in general. Calibration is the...
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Overview
Calibration and Reasons to Calibrate
When one buys gasoline for the car, one expects to get exactly one gallon of gas when paying for one gallon. When one takes a child's temperature,...
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AMS
Analysis and Measurement Services Corporation
ANO
Arkansas Nuclear One
ANSI
American National Standards Institute
APD
amplitude probability density
AR...
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