
MMS Mercury Monitoring System
- Monitors 2 to 24 Measuring Points Automatically
- Versions for Air, Hydrogen, and other Gases
- Permanent Purging of all Sample Lines
- Ranges from 0.01 µg/m³ to 2000 µg/m³ Hg
- Automatic Calibration Module
- Software for Data Acquisition, Data Visualization and Storage
Benefits of the MMS Mercury Monitoring System:
- low maintenance demand
- No sensitivity for water vapor
- High stability of calibration
- Quick response time
Function
The sample is continuously drawn from each
sampling point through special tubing to a heated multiplexer
valve unit. One sample at a time is fed into the Mercury Vapor
Monitor where the mercury concentration is measured. All sample
lines are permanently purged with sample thus minimizing the
response time of the system. By this method sample line lengths of
100 m and even more can be employed.
System Design
The MMS system basically comprises a
multiplexer-valve
unit and a highly accurate and selective mercury detector. A bypass
pump maintains a steady flow of sample through the sample filters,
sample lines and multiplexer valves. Flow meters with optical alarm
sensors
guarantee that flow rates are stable. All components are installed
inside a protective cabinet. A special version employing the Mercury
UltraTracer UT-3000 as detector is available for concentrations in
the
sub-µg/m³ range. Options like air conditioning assure reliable
function of the system even under extreme climatic conditions.
Applications of the MMS:
monitoring of mercury in:
- chlor-alkali plants with mercury cells
- Metallurgical industry
- Fluorescent lamp production or recycling
- Battery recycling plants
- Natural gas industry
- Contaminated sites
- Hydrogen industry

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Technical Specifications of the MMS
Multiplexer Module
- Number of sampling points: 2 to 24
- Purging of sample lines: continuously, ca. 40 ... 80 l/h for each channel
- Flow control: Flow meters with alarm sensors for low flow
- Heating of valve unit: approx. 70 °C
- Sample line connectors: fittings for 4 mm i.d./ 6 mm o.d. tubing
- Valves: minimum dead volume
- Measuring duration: 45 sec ... 99 minutes, adjustable separately for each channel
Detector
- Measuring principle: UV absorption at 253.7 nm
- Type for standard range: Mercury-Vapor-Monitor VM-3000
- Measuring range (standard): 0.1 to 100 µg/m³; 1 to 1000 µg/m³; 1 to 2000 µg/m³
- Type for low range: Mercury Ultratracer UT-3000
- Measuring range (low range): 0.01 to 50 µg/m³
- Sample flow: ca. 80 l/h
- PC connection: serial protocol RS 232; connection by cable (optionally by fiber optic cable); modbus RTU; Ethernet
Mechanical
- Cabinet: metal, protection standard IP 55 (NEMA 4X, others as an option)
- Dimensions: from 553 x 600 x 500 mm (WxHxD) to 800 x 2000 x 600 mm; according to channel number and optional equipment (air conditioning)
- Weight: approx. 35 - 175 kg; depending on number of channels and optional equipment
Software
- System requirement: PC with Windows XP, Vista
- Display of measuring data: actual readings numerically, filed data as time-concentration graphs
