TCD3000 TRANSMITTER

 

Hydrogen (H2) concentration, purity, upper and lower explosion level (LEL & UEL)

 

Analysis of process gases

 

Solution for gas chromotography (TCD MEMS)

 

Customization and R&D

The compact and robust transmitter TCD3000 is recommended for precise, fast and sensitive measurement of (quasi-) binary gas mixtures.
Due to the stainless-steel housing and the IP67 protection class, the unit can be used safely in harsh environments.
The unit is completely equipped with metal-to-metal connections, so that a high degree of tightness and pressure resistance over 200 bars can be guaranteed.

The gas-carrying parts and the sensor are corrosion-resistant:
The gas path is made of high-grade stainless steel 1.4404,
The sensor on the gas side is completely glazed.
In addition, the sensor is protected against condensation and dust.

The internal memory can store the curves for up to 99 gas pairs, so that the device can be easily adapted to changing measurement requirements.
The unit is connected to the process via axial pneumatic connections M10. Such a system makes assembly and disassembly in existing installations easier.
At the customer’s request, the wide range of adapters is available.

SPECIFICATION
Dimensions with connectors; weight B=54 mm, H=80 mm, D=34 mm; ~500g
Power supply 12-36 VDC, 24 W
Digital Output RS485 or TTL Baud rate 19200/ Data 8bit
Analog Output 4-20 mA, 3-wire connection
Ambient temperature range -10 °C to 50 °C
Warm up time Approx. lOmin Approx. 10 min
Flow rate 10 l/h-120 l/h
90-time < 1s
Noise < 0,5 ppm
Drift at zero point < 50 ppm per week
Repeatability < 50 ppm
Error due to change of ambient temperature < 50 ppm per 10 °C
Error due to change of flow at 70 1/h < 50 ppm per 10 l/h
Gas pressure (absolute) 0,8 – 200 bara / 700 bara on request
Error due to change of pressure (above 800h Pa) < 50 ppm per 10 hPa
All data refer to 0,5 vol% H2 in N2

The measurement of hydrogen concentration using thermal conductivity offers several advantages

  • Firstly, it enables a fast and accurate determination of hydrogen content in a medium. By utilizing thermal conductivity, precise measurements can be obtained without the need for complex and time-consuming sampling or chemical analyses.
  • Secondly, it enables a fast response time of just 100 ms, allowing for nearly real-time monitoring. This enables quick detection of changes in hydrogen concentration and early identification of potential safety risks.
  • Thirdly, thermal conductivity measurement is a cost-effective solution. The required sensors and devices are typically affordable and easy to operate. Additionally, the method does not require expensive consumables or extensive maintenance.
  • Fourthly, thermal conductivity measurement provides a wide dynamic measurement range. It can detect hydrogen concentrations ranging from a few parts per million (ppm) to 100% volume percent (Vol%). This versatility allows for its application in a variety of scenarios, from monitoring hydrogen leaks in industrial facilities to accurately determining hydrogen concentration in fuel cells.
  • Finally, measuring hydrogen concentration through thermal conductivity allows for continuous monitoring. By employing automated systems, continuous measurements can be performed to capture real-time changes and detect potential safety risks early on.
  • Overall, the measurement of hydrogen concentration using thermal conductivity provides an efficient, accurate, non-contact, and cost-effective method for monitoring hydrogen in various applications, including industry, energy systems, and environmental protection.

MEASUREMENT RANGES FOR BINARY GASES

Measuring Gas Carrier Gas Basis Range Smallest Range
Hydrogen (H2) Nitrogen (N2) or Air 0%-100% 0%-0.2%
Oxygen (O2) Nitrogen (N2) 0% – 100% 0% – 15%
Helium (He) Nitrogen (N2) or Air 0% – 100% 0% – 0.8%
Carbon dioxide (CO2) Nitrogen (N2) or Air 0% – 100% 0% – 3%
Nitrogen (N2) Argon (Ar) 0% – 100% 0% – 3%
Oxygen (O2) Argon (Ar) 0% – 100% 0% – 2%
Hydrogen (H2) Argon (Ar) 0% – 100% 0% – 0.1%
Helium (He) Argon (Ar) 0% – 100% 0% – 0.5%
Carbon dioxide (CO2) Argon (Ar) 0% – 60% 0% – 10%
Argon (Ar) Carbon dioxide (CO2) 40% – 100%
Methane (CH4) Nitrogen (N2) or Air 0% – 100% 0% – 2%
Methane (CH4) Argon (Ar) 0% – 100% 0% – 1.5%
Argon (Ar) Oxygen (O2) 0% – 100% 0% – 3%
       
Measuring Gas Carrier Gas Basis Range Smallest Range
Nitrogen (N2) Hydrogen (H2) 0% – 100% 0% – 2%
Oxygen (O2) Carbon dioxide (CO2) 0% – 100% 0% – 3%
Hydrogen (H2) Helium (He) 20% – 100%
Hydrogen (H2) Methane (CH4) 0% – 100% 0% – 0.5%
Hydrogen (H2) Carbon dioxide (CO2) 0% – 100% 0% – 0.5%
Sulfur hexafluoride (SF6) Nitrogen (N2) or Air 0% – 100% 0% – 2%
Nitrogen dioxide (NO2) Nitrogen (N2) 0% – 100% 0% – 5%
Hydrogen (H2) Oxygen (O2) 0% – 100% 0% – 0.2%
Argon (Ar) Xenon (Xe) 0% – 100% 0% – 3%
Neon (Ne) Argon (Ar) 0% – 100% 0% – 1.5%
Krypton (Kr) Argon (Ar) 0% – 100% 0% – 2%
Extinguishing gas (R125) Nitrogen (N2) or Air 0% – 100% 0% – 5%
Deuterium (D2) Nitrogen (N2) or Air 0% – 100% 0% – 0.5%
Deuterium (D2) Helium (He) 0% – 100% 0% – 5%
 
GENERAL APPLICATION SECTORS

oil & gas, petrochemicals, chemicals and synthetics

gas chromatographs

air separators and pure gas production

detection of gas leakages

pharmacy

food industry

metals, minerals, pulp and paper

power generation

environmental technology
APPLICATION SECTORS – EXTENDED INFORMATION
 
 
 
Hydrogen as an impurity
H2
0-0,5Vol.%
Impurities in Hydrogen (ring lines)
H2
99-100Vol.%
Input to Argon refining process
H2
Lower explosion level (LEL) / Upper explosion level (UEL)
Hydrogen production via electrolysis
H2
   –   
Annealing furnace
H2
   –   
Blast furnace pig iron production “topgas” hot reducing atmosphere
H2
0-20Vol.%
Basic oxygen furnace (BOF) top blown furnace oxidation of carbon in molten pig iron using high purity O2 and flux
H2
0-10Vol.%
Direct reduced iron in steel plants
H2
   –   ;
Heat Treating H2 N2 blanketing for hardness
H2
0-5Vol.%; 10Vol.%;
Shielding Gas
H2
20Vol.%
Shielding Gas
H2
   –   
Shielding Gas
Ar
   –   
Turbogenerator, monitoring of removal and filling of H2 to prevent Exatmosphere
CO2
0-100Vol.%
Turbogenerator, monitoring of removal and filling of H2 to prevent Exatmosphere
H2
0-100Vol.%
Turbo generator, operation, to assure optimum efficiency
H2
90-100Vol.%
Turbo generator, cooling gas control over expensive purge gases, minimize maintenance downtime, troubleshooting contamination problems
Air
H2
90-100Vol.%
Turbo generator, alert to any upset air contamination of H2 cooling gas to avoid potential for explosion
H2
0-5Vol.%
Nuclear power, monitoring deuterium (D2) in air
H2
0-5Vol.%
Nuclear power plant, vacuum drag recombiner after condenser
D2
0-20Vol.%
Nuclear powerplant, propagation analysis of hydrogen in order to avoid an ignitable atmosphere
H2
   –   
Determination of the hydrogen content in natural gas
H2
   –   
Ammonia (NH3) production
H2
   –   
Hydrogen production, steam reforming, hydrogen content
H2
   –   
Hydrogen production, Pressure swing adsorption, impurities
H2
70-100Vol.%
Methanol / MTBE production purge gas to reformer
H2
0-5Vol.%
H2 in full cell exhaust
H2
0-100Vol.%
Fuel cells, development and test
H2
0-10Vol.%
Dispersion of gas in car body
H2
   –   
Analysis of quenching gas spread in the locomotive
He
0-100Vol.%
Analysis of spread of hydrogen in plants and buildings
R125 (C2HF5)
0-20Vol.%
Plants and buildings, propagation analysis of hydrogen in order to avoid an ignitable atmosphere
He
   –   
Incoming goods inspection, Identification and quality of delivered gases,
H2
0-100Vol.%
Quality insurance
Impurity
   –   
SF6 for discharge arc protection (GIS, Gas Insulated Switcher)
CF6
95-100Vol.%
Soldering processes, Monitoring of Forming gas
H2
0-10Vol.%
Filling gas monitoring in airships (Zeppelin)
He Humidity
0-5Vol.%
Flat glass production, Monitoring of Forming gas
H2
   –   
Bioprocesses, Monitoring of Forming gas
H2
0-8Vol.%
Monitoring of gas mixing plants
   –   
   –   
Monitoring of process gas in Semiconductor Industry
H2
   –   
Nitrous oxide anesthetic dosage
N2O
   –   
H2 in metal samples (elemental analysis)
H2
   –   
Removal of excess hydrogen, Monitoring the expulsion of H2 from metal melts
H2
   –   
TCD detectors for gas chromatographs
   –   
   –   
 
 
 

INFORMATION

For any further questions or quotes please do not hesitate to contact us using the contact form or contact information below.

Phone : +49 (0)69 247544980

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