• MA: Direct thermal decomposition mercury analyzer
  • PE: Fully automated petro-pyrolysis mercury analyzer
  • RA: Reducing-vaporization mercury analyzer
  • WA: Atmospheric mercury analyzer
  • EMP: Portable mercury survey meter
  • Continuous mercury monitor
  • AM-4
  • EM-5
  • ARA-6

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Continuous gas-borne mercury monitor


The AM-4 is an unmanned continuous mercury analyzer by thermal decomposition with ultra-high sensitivity and a wide measurement range



Highest grade model of Continuous mercury monitor developed by customers’ wish

Our customer’ s wish “to continuously monitor general environment air” or “to continuously monitor flue gas while avoiding effects from interferences” inspired us to develop this highest grade model that measures mercury intermittently and continuously by thermal decomposition.

The AM-4 has ultra-high sensitivity and a wide measurement range from 0.01ng/m3 to 2mg/m3, and mercury can be measured without being affected by interferences.


Mercury analysis by atomic absorption spectrometry without any affection by interferences

After removing moisture in the sample gas, mercury alone is condensed and sampled as gold amalgam in the mercury collector tube. During that time, interferences not needed for measurement such as organic solvents, SOx and NOx are removed, and not collected in the collector tube.

Then, the mercury collector tube is re-heated, and vaporized mercury is measured by atomic absorption spectrometry.

The equipment itself is dedicated to metal mercury sampling (zero-valent mercury), however, by adding the pretreatment equipment (optional), total mercury including oxidized mercury (divalent mercury) can be measured.

Accurate measurement is realized using the mercury standard gas generator

By using the automatic calibration function in the mercury standard gas generator (optional), you can ensure accurate measurement without compromising data reliability.

Also, there is no need to prepare special carrier gas for the AM-4 and the mercury standard gas generator. Since purified ambient air is used, installation is easy, economical and safe.


Mercury collecting sectionMethodGold amalgamation method
Sampling time1sec~99h59min59sec
Sampling flow rate0.1L/min~0.5L/min (adjustable)
Measurement career gasPurified air by activated carbon filter
Mercury detecting sectionMeasurement principleDouble-beam cold vapor atomic absorption spectrometry
Wave length253.7nm
DetectorPhoto-tube, Semiconductor sensor
Detection Limit0.001ng (0.01ng/m3)
Measurement rangeLOW range: 0~5ng
MID range: 0~100ng
HIGH range: 0~1000ng
Minimum display digit0.0001mg/m3N
Repeatability±2% against maximum scale value
Zero drift±2% against maximum scale value
Span drift±2% against maximum scale value
Directions Error±3% against maximum scale value
Stability of direction value against power supply voltage±2% against maximum scale value
Input-Output SignalAnalog OutputMercury concentration (Instant value): DC4~20mA
Contact OutputRated load: AC250V 5A, DC30V 5A
Contact InputExternal start input
Data OutputPC connection or SD card


Mercury analysis in Gas: General environment, Working environment, Flue gas


No special options available.

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