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HERMES Personal Mercury Monitor

Handheld mercury vapor monitor capable of providing real-time measurements with data logging capabilities. Can be battery operated and is ideal for applications such as: monitoring of exposure to individuals in the workplace, monitoring and control of mercury in industrial settings, personal exposure monitoring for studies of health effects of air pollutants, and long-term monitoring at remote locations where power is highly limited.

  • 0-2,000 μg/m3 Hg with a precision of 0.1 μg/m3
  • Built-in GPS to provide location data along with mercury measurements
  • Smallest atomic absorption spectroscopy-based mercury monitor available on the market


  • Miniaturized UV-based mercury monitor
  • Handheld, battery operable, and weighing less than a pound
  • Built-in GPS so that mercury measurements may be logged continuously along with geographic location
  • Built-in data logging capabilities
  • Mercury vapor measured by absorption at 254 nanometers, using the same principles as our ozone monitors
  • U-shaped 15-centimeter path length, enabling sensitive measurements of mercury in ambient air


  • Handheld monitor for absorption-based measurements of mercury vapor is the smallest available on the market today
  • Measurement principle:  UV absorption at 254 nanometers
  • Measurement frequency of once every 2 seconds
  • Averaging times of 10 s, 1 min, 5 min, and 1 hour
  • Onboard GPS for location information
  • Built-in datalogger
  • Lithium-ion battery (5-8 hrs of operation)
  • DewLine for elimination of any water vapor interference, a unique feature of 2B Tech instruments
  • HERMES Personal Mercury Monitor
  • 1.25A power adapter
  • 7.4V lithium-ion batteru
  • Battery charger
  • Serial port cable
  • USB cable
  • Serial-USB adapter
  • External mercury scrubber
  • USB flash drive preloaded with operation manual, other useful documentation, and driver for Serial-USB adapter
  • NIST-traceable calibration certificate
  • Sampling probe
  • Wall-mount bracket upgrade available
  • Extension to lower operating pressures
  • Citations coming soon!


Spec Sheet
Measurement Principle UV Absorption at 254 nm
Linear Dynamic Range 0 to 2,000 μg/m3
Resolution 0.1 μg/m3
Precision (1σ rms noise) Greater of 0.1 μg/m3 or 2% of reading (in 10-s measurement mode)
Limit of Detection (2σ) 0.2 μg/m3 (in 10-s measurement mode)
Accuracy Greater of 0.5 μg/m3 or 5% of reading
NIST-Traceable Calibration Yes
Measurement Interval Fast mode: 2 s
Measurement mode: 10 s
Data averaging options: 1 min, 5 min, 1 hr
Flow Rate (nominal) ~0.8 Liter/min
Flow Rate Requirement >0.5 Liter/min
Baseline Drift < 0.1 μg/m3/day
< 5 μg/m3/year
Sensitivity Drift < 1%/day
< 3%/year
Measurement Time, Frequency Fast mode: 2 s, 0.5 Hz
Measurement mode: 10 s, 0.1 Hz
Response Time, 100% of Step Change For 2-s output: 4 s, 2 points
For 10-s output: 20 s, 2 points
Averaging Times 1 min, 5 min, 1 hr
Data Storage 8,192 lines
(2-s fast mode ~4.6 hr; 10-s meas. mode ~1 day; 1-min avg ~6 days; 5-min avg ~1 mo; 1-hr avg ~1 yr)
Mercury Units ppb, µg m-3
Pressure Units torr
Temperature Units K
T and P Corrected Yes
Operating Temperature Range 0 to 50 °C
Operating Altitude Range ~0-13.5 km (150-1,013 mbar)
[modifications for higher altitudes available as an option]
Power Requirement;
Supplied by battery or 110/220 VAC Power Pack
7-24 V dc, nominally 250 mA at 12 V, 3.0 watt
External Battery 7.4 Volt, 1.6 amp hour, Lithium Ion Battery, 5-8 hr
Size 4.0 x 3.0 x 1.5 inches (10.2 x 7.6 x 3.8 cm)
Weight 0.75 lb. (0.34 kg) without battery
Data Transfer Baud Rate 19200
DewLine™ Yes
Options Sampling probe, modifications for higher altitude, wall-mount bracket


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+1 (303) 273-0559

Case Studies

Case Studies for this product are coming soon!
"A very compact, lightweight, rugged and accurate instrument. A great product! A great group of people!"
Anonymous Customer Survey Feedback

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