Hermes™ Personal Mercury Monitor™

The World's Smallest Mercury Monitor

HERMES™ Personal Mercury Monitor

​2B Tech has taken the next step in miniaturization of UV-based mercury monitors by developing the Hermes Personal Mercury Monitor or "PMM." The Hermes has dimensions of 4 x 3 x 1.5 inches and weighs only 0.75 lb (340 g). It has a built in GPS so that mercury measurements may be logged continuously along with geographic location. By folding the optical path in the shape of a "U," it was possible to achieve a 15-centimeter path length, enabling extremely sensitive measurements of mercury in ambient air.



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 0.1 μg/m3 or 2% 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:

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:

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)
Data Transfer Baud Rate: 19200
DewLine™: Yes
GPS: Yes
Sampling Probe: Available as an option

System Includes