Automatic mercury monitoring in natural gas


Automatic system designed for continuous mercury monitoring in natural gas even in hazardous zones (ATEX, IEC-Ex)

Each mercury on-line system will differ in sample characteristics as well as installation conditions and operating environment. We have the experience to design systems that fully meet the requirements of your particular mercury monitoring task.

  • Automatic and continuous measurement
  • Fast and Reliable Results
  • Detects Elemental and Bound Mercury
  • Automatic Calibration
  • Sample Point Multiplexer
  • Sample Dilution for High Concentrations
  • No Carrier Gases Required
  • Certified for Hazardous Zones
  • Natural gas platforms
  • Natural gas exploitation
  • Natural Gas processing plants
Technical Specifications
Measuring principle Amalgamation (MI GoldTrap), cold vapor atomic absorption (CVAAS) at 253.7 nm
UV-Source Electrodeless low pressure mercury lamp (EDL)
Stabilization method Reference beam method
Optical cell Fused silica (Suprasil), l: approx. 230mm, heated approx. 45°
Measured component Total Gaseous Mercury (TGM)
Measuring ranges lowest range:
0.1 ng/m³ – 1000 ng/m³ (at 10 l sample gas volume); medium range: 1 ng/m3 – 10 000 ng/m3 (at 1 l sample gas volume); screening mode: 10 ng/m3 – 30 000 ng/m3 (at 0.1 l sample gas volume)
Detection limit 1 pg absolutely or 0.1 ng/m3
Linearity over the 0.2 to 15000 ng/m3 range 3% or better
Reproducibility 5% or better
Technical data
Signal output: analogue 4-20 mA; serial: RS232; Modbus RTU RS485 (option); Ethernet (option)
Status output 3 x pairs of relay contacts (dry contacts)
Max. sample temperature 80 °C
Operating temperature 0- 35°C; -5 – 55 °C (air conditioned)/td>
Power supply 230 VAC / 50 Hz (110 VAC / 60 Hz option)
Power consumption, Dimensions and Weight depending on characteristics and customer demands
  • Our products are manufactured according to the ISO 9001 quality regulations.
  • CE approved
  • Hazardous zone certification: ATEX 2G IIC T4 EExp (or equivalent)
  • Calibration: ISO/DIS 6978-3; ASTM D 5954; VDI 2267 Part 8; NIST recommendations
  • Sampling and mercury determination: ISO 6978-1; ASTM 5954