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6 Alternatives to Mercury Thermometers

6 Alternatives to Mercury Thermometers

Mercury is increasingly recognized as a material that’s difficult to ship, can be hazardous to the environment, and presents high costs if spillage occurs. Regulatory measures are confusing, complex and vary widely from state to state, and even between local areas. Standards organizations such as ASTM and AASHTO recognize the difficulties mercury thermometers present and requirements of many testing procedures are being modified to incorporate the use of non-mercury thermometers.  Here at Gilson, we want to make it as easy as possible to identify the best alternative devices for your application, if mercury thermometers are not an option for you. In this blog post we’ll outline some non-mercury friendly thermometric equipment options to be aware of.


ASTM Non-Mercury Thermometers


ASTM Non-Mercury Thermometers

ASTM Non-Mercury Thermometers comply with test method requirements for use in their referenced applications and duplicate performance characteristics of ASTM Mercury-filled Thermometers, but use a safe blue liquid indicating fluid.

Performance Features:

  • Liquid-in-glass fluid is biodegradable, nontoxic and nonhazardous
  • Dark blue color is highly visible against white-backed stem for accuracy
  • Thermometers may optionally have NIST traceable five-point certification by ISO/IEC accredited labs

ASTM Equivalent Non-Mercury Thermometers


ASTM Equivalent Non-Mercury Thermometers

ASTM Equivalent Non-Mercury Thermometers have the same physical and performance characteristics as ASTM Non-Mercury Thermometers and the same ranges and divisions as ASTM Mercury-filled thermometers, but have not yet been reviewed by ASTM subcommittees for their referenced applications.

Performance Features:

  • Liquid-in-glass fluid is biodegradable, nontoxic and nonhazardous
  • Dark blue color is highly visible against white-backed stem for accuracy
  • Thermometers may optionally have NIST traceable five-point certification by ISO/IEC accredited labs

Digital Thermometers


Digital Thermometers

Digital Thermometers are useful for a variety of applications such as air or fluid readings, surface temperatures, high-temperature applications and more. Today, digital thermometric technologies are versatile and generally superior to the mercury-in-glass design, with wider effective temperature ranges and faster equilibration.

Performance Features:

  • Accurate, durable and easy-to-operate; no risk of glass breakage
  • Clear LCD displays show fine resolutions with no interpolation needed between division marks
  • Maximum-minimum, memory, alarms, and switchable temperature units are available

Traceable Printing Thermometers


Traceable Printing Thermometers

Traceable Printing Thermometers are a specific type of digital thermometer that offers permanent, hard-copy documentation and full-time monitoring for today’s stringent quality control requirements.

Performance Features:

  • Two-channel, automatic print feature prints date, time and temperature in desired interval
  • Alarm system alerts user if temperature exceeds set points
  • Temperature display for Type J, K, T or E thermocouple probes
  • Internal memory stores minimum, maximum and average temperatures

4-Channel Thermometers


4-Channel Thermometers

4-Channel Thermometers  use up to four optional probes to display data on a backlit LCD screen in °C or °F using standard Type K Thermocouples.

Performance Features:

  • Backlit LCD screen offers clear visibility of temperatures in °C or °F
  • Automatic shut-off feature conserves battery life
  • Auto-ranging, Max/Min and hold functions offer convenient, automated temperature determinations
  • Accuracy to ±0.5% of reading +1°C or 2°F, full-scale
  • Available model features data-logging capabilities for advanced documentation

Basic Type K or J Thermometers


Basic Type K or J Thermometers

Basic Type K or J Thermometers deliver precise temperatures for many different applications.

Performance Features:

  • Max/min memory hold
  • Auto-power preserves battery life
  • Four digit LCD screen seamlessly switches from °C to °F
  • Accurate to ±0.05% of reading +0.7°C (1.4°F) 

You should be aware of state/regional restrictions. If there are no restrictions in your area, we’ll continue to ship mercury thermometers to you. Please Contact us if you need help selecting a non-mercury alternative.