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GM700
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Greater efficiency of process analysis by using TDLS technology: Even under most difficult conditions High reliability and precision as well as minimal response times are the distinguishing features of the GM700 TDLS analyzer. Based on the principle of TDLS and by using specific light absorption the GM700 is able to measure several gas components, such as NH3, HF, O2 or HCl. For determination of gas concentrations in process control and emission monitoring you can choose from a rapid in-situ measurement (GM700) or an extractive measurement with heated multipath measuring cell (GME700). Applications
- Ammonia slip measurement in DeNOx-plants
- Emission monitoring of hydrogen fluoride in aluminium smelters
- Ammonia measurement in exhaust gas of combustion engines
- Ammonia measurement in urea production
- Hydrogen chloride monitoring in raw gas upstream of the scrubber in waste incineration plants
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Measuring principle |
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Laser photometry |
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Measuring components |
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HCl, HCl/H2O, HF, NH3, NH3/H2O, O2 |
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Number of measuring components |
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1 to 2 |
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Measuring ranges |
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HCl: 0 ... 5 ppm / 0 ... 3,000 ppm
HCl/H2O: 0 ... 5 ppm (0 ... 25 Vol%) /
0 ... 3,000 ppm (0 ... 100 Vol%)
HF: 0 ... 1 ppm / 0 ... 2,500 ppm
NH3: 0 ... 5 ppm / 0 ... 5,000 ppm
NH3/H2O: 0 ... 2.5 Vol% / 0 ... 100 Vol%
O2: 0 ... 1.5 Vol% / 0 ... 100 Vol%
The measuring ranges refer to 1 m measuring path; they depend on the device type
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Measuring paths |
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Open measuring probe (GMP): 0.25 ... 1 m
Gas-testable measuring probe (GPP): 0.25 ... 1 m
Cross-duct type: 0.5 ... 6 m
19"-rack: 2.3 ... 4.5 m |
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Sample gas temperature |
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0 ... 430 °C, higher temperatures on request |
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Sample gas pressure |
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-250 ... 250 hPa, depending on device type and purge air supply |
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Dust load |
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0 ... 1 g/m³, depending on dust properties |
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Ambient temperature |
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-40 ... 50 °C, four ranges adjustable |
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Ambient humidity |
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0 ... 85 %, relative humidity; bedewing of optical surfaces not permitted |
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Ex-approvals |
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Ex-type for zone 2 on request |
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Electrical safety |
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CE, EMC |
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Enclosure rating |
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Measuring probe type: IP 65 / NEMA 4x
cross-duct type: IP 65 / NEMA 4x
19"-rack: IP 20 |
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Analogue outputs |
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3 outputs:
0/4 ... 20 mA, 500 Ohm,
electrically isolated; freely programmable |
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Analogue inputs |
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1 input:
0 ... 20 mA, 100 Ohm |
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Digital outputs |
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3 relay contacts:
48 V AC, 1 A, 60 VA / 48 V DC, 1 A, 30 W,
preset for failure, maintenance and functional control |
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Digital inputs |
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3 inputs:
24 V, for connection of floating contacts |
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Interfaces |
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RS-232 |
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Bus protocol |
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PROFIBUS (Option) |
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Device types |
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19''-rack, cross-duct type, measuring probe type |
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System components |
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Analyser, evaluation unit, measuring probe or reflector unit, sender/receiver unit |
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Test functions |
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Automatic control cycle for reference and zero point |
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