The GO-ATC and the GO-Mini-ATC are online analysis systems that determine, for example, the total hydrocarbon (THC) share in air.
See also the technical article in the Cleanroom Yearbook (Reinraum Jahrbuch)
Online analysis system
This method can be used for online measurement of hydrocarbons and other chemical constituents in many areas of industry and research, for example in the ultrapure gas and breathing gas sectors, the chemical industry, especially petrochemicals, indoor air monitoring, and more.
The GO-ATC air total carbon analyzer is used to determine the share of the total hydrocarbon content of air, optionally including further gas components.
Methane is measured online at the same time in order to determine the NMHC (non-methane hydrocarbon) value. Unlike conventional air measurements, the absolute value of organically bound carbon in the gas flow is not determined; instead, the delta between the concentrations of two gas streams is formed.
The measured values are determined by converting the CO2 concentration in the gas streams.
The GO-ATC analyses method
A sample gas flow (of approx. 120 l/h) is continuously taken from the gas to be tested (1).
The gas flow is evenly divided between the symmetrically parallel measurement side (2) and reference side (3).
The gas flow on the measurement side is passed through a reactor (4) heated to 1,000 °C and containing a catalytically coated packing. On the reference side, the gas is passed through a reactor (5) heated to 120 °C in order to prevent the deposition of water or hydrocarbons.
The measurement/reference gas is then passed through a gas cooler (6) for drying (the resulting condensate is drained) and subsequently passed through filters (7) to remove acid and particles.
Mass flow control is then performed using a diaphragm pump (8) and a flow controller.
Analysis 1:
The CO2 concentration of the gas in the measurement cuvette is compared with that in the reference cuvette using the CO2 measuring cell.
Analysis 2:
In parallel, the concentration difference in CH4 (methane) between the reference cuvette and the measurement cuvette is determined in the same way.
Facts
Equipment options
- Device for measuring absolute CO2
- Device for measuring other gases
- Software
- Further options on request
Benefits
- Continuous measured value recording
- No consumables
- No ultrapure gases
- Low operating costs
- Measurement resolution: 0.01 ppm
- True online measurement
- No CO₂-free air / no fuel gas
- Optional remote maintenance and data retrieval via LAN, WAN, and GSM/UMTS
- Safe, simple, and eco-friendly handling
- Automatic calibration
GO-ATC performance data
- NDIR gas analyzer
Ultramat 6 - Minimum measurement range GO-ATC
0,01 ppm - Permissible water share of sample gas
8.00 ml/h / 500 ml/h per channel - Display
LCD - Limit value outputs
4 - Output signals
0 / 2 / 4 – 20 mA / serial interface - Operating temperature of the oxidation reactor
1,000 °C - Warm-up time
approx. 240 Min. - T90
approx. 20 sec. - Gas cooler
Peltier cooler GO-PK2 - Crude gas sample flow rate
approx. 2 x 1 l/min. - Power consumption
max. 2,800 W - Mains connection
230 V, 50 Hz - Ambient temperature
+5 to +30 °C - Dimensions (H x W x D)
approx. 1,150mm x 560mm x 600mm - Weight
approx. 85 kg - Automatic zero-point adjustment
yes / self-calibration - Materials conducting sample
ceramic, glass, Viton, PVC, stainless steel (VA)
