General Information
ZIROX flue gas probes (SS31) are robust sensors which serve the λ-determination in large-scale firing plants as well as the measurement of oxygen partial pressure of furnace atmosphere.
The probes are calibration-, drift- and maintenance-free. During measurements in reducing atmosphere, a falsification of the gas composition caused by cooling of the measuring gas in a suction line does not occur. An integrated heater provides the working temperature. The use of high-quality components and materials guarantees high long-term stability.
Applications
Flue gas measurements in power plants
Process gas measurements
Technical Data Oxygen Probe SS31H
Length300...1800 mm
Diameter25 mm
Weight1...3.5 kg
Material1.4841
Dimension clamp head75 x 80 x 60 mm
Clamps5 x Phönix MBK 2,5/E
Protection degreeIP52, IP65 on request
Power supply36 V (DC oder AC)
Heater resistance AC / DC8 Ohm
Heating current AC / DC4.5 A
Heating power AC / DC160 VA
Heater controlmax. cycle time at PWM 500 ms
Range-0.01...20.6 Vol.-% O2
Accuracy< 5 % rel. error
Working temperature700...800 °C
Offset-2 m...-10 mV
Sensor voltage
(5.0 Vol.-%, 800 °C)-33.1 mV
Thermocoupletype B (800 °C corresponds to 3.2 mV)
Flow measuring gasmax. 10 m/s
Reference gasambient air
Flow reference gas5...10 l/h
Mounting recommendation:
stuffing box or cutting ring fitting
Option:
Test gas channel (for in-situ check of the probe)
Immersion sleeve (probe protection at gas flow > 10 m/s)
Miniature Probes
General Information
Potentiometric oxygen probes developed for the exhaust gas measurements in motor vehicles (λ-probes) are frequently used in industrial equipment. Due to their construction, these probes have some disadvantages: because of the uncontrolled heating (steady working voltage) and ceramic coating of the electrodes (which increase the diffusion of special gas components) significant measuring errors can result.
The ZIROX miniature probes MS27 and SS27 with controlled heater and integrated primary electronics features high accuracy at comparatively lower costs. The main part is the approved ZIROX potentiometric zirconia-based solid electrolyte cell (drift-, calibration- and maintenance-free). The use of high-quality components and materials guarantees high long-term stability.
The SS27 was developed for trace measurements under oxidizing conditions. The MS27 was constructed for reducing conditions or oxygen concentration of more than 100 ppm. Both probe types only differ in the type of sensor element.
Applications
Oxygen measurements in protective gases
Exhaust gas measurements in large-scale engines
Control optimization in small combustion plants
Furnace gas measurements in heat treatment equipment
Optimisation of incineration plants
Monitozing of industrial processes under protective or inert gas atmosphere
Technical Data Miniature Probe SS27/MS27
Installation length65 mm (incl. M18x1.5), 75 mm (DN40KF)
Diameter10 mm
Weight0.5 kg
Dimension clamp head64 x 58 x 36 mm
Protection degreeIP42, others on request
Power supply24 V DC
Power consumption17 W
Warm-upapprox. 5 min
Sensor voltage (raw signal)0...200 mV (0...300 mV on request)
Range (SS27)15 ppm...20.6 Vol.-% O2 (0...200 mV)
0.13ppm...20.6 Vol.-% (0...300 mV)
Accuracy< 5 % rel. error
Measuring gas temperaturemax. 300 °C
Probe working temperature700 °C
Surrounding conditions probe headmax. 50 °C, rel. humidity < 80 %
Offsetapprox. -2...-8 mV (compensable)
Output signal4-20 mA (0-5 V, 0-10 V on request)
Plug assignment:
(1) Analog output+ IA
(2) Analog outputGND IA
(3) Power supplyGND VB
(4) Power supply+ 24 V VB
(5) RelayRDY
Calculation of oxygen concentration:
The oxygen partial pressure is calculated by the NERNST equation.
For normal pressure applies:
ϕ(O2) = 20.64 * e (-46.42 U/T)
ϕ(O2): oxygen concentration in Vol.-%
U: cell voltage in mV
T: cell temperature in K (700 °C = 973.15 K)
20.64: oxygen concentration in ambient air at 50 % rel. humidity
Translation of the output signal (range 0...200mV):
Current output 4-20 mA1 mA ≙ 12,5 m cell voltage
Voltage output 0-5 V1 V ≙ 40 mV cell voltage
Voltage output 0-10 V1 V ≙ 20 mV cell voltage
Example for 0...200 mV range:
At a current of 5.5 mA ((5.5-4)mA x 12.5 mV = 18.75 mV) an oxygen concentration
ϕ(O2) = 8.43 Vol.-% results.
High Temperature Probes
General Information
The ZIROX high temperature probe KS20 was developed especially for the use under extreme temperature conditions up to 1,450 °C. The oxygen partial pressure can be recorded directly in the burning chamber. The KS20 is calibration-, drift- and maintenance-free.
During measurements in reducing atmosphere, a falsification of the gas composition caused by cooling of the measuring gas in a suction line does not occur. The use of high-quality components and materials guarantees a high long-term stability. If the fuel gas composition is known, it is possible to calculate the air factor λ, the CO-, CO2-, H2- and the H2O- concentration. These values can be provided by external electronic units (e.g. ZIROX® electronic unit E2000).
The KS20 serves the process control and combustion optimization (TÜV-approval according to "TA Luft, 13. und 17. BImSchV") in power and heat plants as well as in incineration plants.
It is also part of control for oxidizing and reducing furnace gases in the ceramic industry.
Applications
Flue gas measurements in the high temperature range
Furnace gas control in the ceramic industry
Measurements in protective and inert gases
Technical Data Oxygen Probe KS20
Length300...1500 mm
Diameter25 mm ceramic tube, 28mm steel shaft
Weight1...3.5 kg
MaterialAl2O3
Clamp headthermocouple head
Clampsspecial clamps on ceramic socket
Rangeoxidizing and reducing conditions
(100 Vol.-%...10-29 Vol.-% O2)
Accuracy< 5 % rel. error
Working temperature700...1400 °C
Offset0 mV
Sensor voltage
(5.0 Vol.-%, 800 °C)-33.1 mV
Thermocoupletype B (800 °C corresponds to 3.2 mV)
Reference gasambient air
Reference gas flow5...10 l/h
Vacuum-Resistant O2-Probe for PVD or Magnetron Sputtering
General Information
Main part of the ZIROX vacuum probe is a potentiometric zirconia solid electrolyte cell.
Due to various oxygen partial pressures (inside and outside the vacuum recipient) a voltage occurs between measuring and reference electrode. This voltage is proportional to the logarithm
of the oxygen partial pressures. From the cell voltage the oxygen partial pressure at measuring electrode can be calculated according to the NERNST equation.
The connection head contains the electronics for heater control and signal processing and the membrane pump for the reference gas supply.
Applications
The ZIROX vacuum probe serves for the determination of oxygen partial pressures in low pressure equipment. Typical examples are measurements in vacuum processes (PVD, magnetron sputtering or other plasma processes), in surface treatment applications as well for measurements for material-scientific investigations.
Note:
In contrast to the ZIROX normal pressure probes the vacuum probe is not calibration-free. The reasons are the special sensor heater (inside the probe tube) and several conditions at the measuring electrode (energy removal depends on gas pressure and thermal conductivity). Therefore, isothermal electrodes, required for the correct using of the NERNST equation, cannot be realized. For process control, however, the use of empirically determined values is sufficient in most cases. For the measurement of oxygen partial pressures, the user must calibrate the probe (test measurements).
Technical Data Vacuum Probe
Inbuilt length140...300 mm
Diameter6 mm, with protection tube 16 mm
Mass1,5 kg
Dimension clamp head150 x 63 x 35 mm
Protection degreeIP54
FlangeKF40, others on request
Max. temperature at flange60 °C
Power supply24 V DC +/- 10 %
Current consumption1,2 A
Heating power30 W
Pressure range1,5 x 105...1 x 10-5 Pa
Sensor voltage range0...400 mV oder 0...1200 mV
(range changing on curcuit board)
Range
(oxygen partial pressure)1 x 105...1 x 10-21 Pa
Output signal0-20 mA
Accuracy< 5 % rel. error
Sensor working temperature700 °C (electronically controlled)
Offset (with protection sleeve)-15...-20 mV
Helium leak rate< 10-8 mbar l/s
Gas flowmax. 10 m/s
Reference gassurrounding air
Reference gas flow5...10 l/h (by internal pump)
1+ 24 V
2GND
3+ Iout20 mA corresponds to 400 or
1200 mV (as adjusted)
4- Iout
5Ready contact
(potential free)60V/1A DC or
125V/1A AC
Q-Probe
General Information
The main part of the Q-probe SS20 is a potentiometric solid electrolyte cell (zirconia sensor). Because of several oxygen concentrations at the electrodes (ambient air at reference electrode), a voltage is reached which is proportional to the logarithm of the oxygen concentrations. The designation Q-probe points out that the quotient of partial pressures of the reactive furnace gases (only gases reacting with oxygen) can be calculated from the probe signal. Water vapour and hydrogen or H2O+CO2 and H2+CO in the water gas equilibrium shall serve as an example. The Q-probe is calibration-, drift- and maintenance-free. Falsifications of the gas composition do not occur. In suction lines, however, the cooling of the measuring gas may cause them. The use of high-quality components and materials guarantees high long-term stability.
Applications
The Q-probe serves the monitoring of protective gases or the controlling of partial oxidation processes (redox-quotient, oxidation character KO) in heat treatment applications for metallic materials. The probe is also used in nitriding or nitrocarburizing applications. By combining the signals of a Q-probe and a QE-probe, the nitriding character KN or carburizing character KC can be adjusted and controlled as well as, if necessary, the carburizing character Kc considering the unburnt gas compound.
Technical Data Q-Probe SS20.BQ
Length300...1800 mm
Diameter25 mm
Weight1...3.5 kg
Material1.4841
Dimensions clamp head75 x 80 x 60 mm
Clamps3 x Phönix MBK 2.5/E
Protection degreeIP52, IP 65 on request
Range0...1500 mV
Accuracy< 5 % rel. error
Working temperature500...1100 °C
Thermocoupletype B
(800 °C corresponds to 3.2 mV)
Reference gasambient air
Reference gas flow5...10 l/h
General Information
The main part of the QE-probe XS11 is a potentiometric solid electrolyte cell (zirconia sensor).
This sensor continuously receives a gas sample via gas flow over a heated catalyst (complete decomposition of NH3). Cell and catalyst have a temperature of 760 °C to avoid unwanted reaction products (e.g. CH4). The designation QE-Probe points out that the quotient of partial pressures of the reactive furnace gases (only gases reacting with oxygen) at totally reached equilibrium can be calculated from the probe signal. Water vapour and hydrogen or H2O+CO2 and H2+CO in the water gas equilibrium shall serve as an example.
The QE-Probe is calibration-, drift- and maintenance-free. The use of high-quality components and materials guarantees high long-term stability.
Applications
The QE-probe is used in hardening technology in nitriding and nitrocarburizing processes.
It serves the monitoring of the protective gas. By combining the signals of a QE-probe and a Q-probe, the nitriding character KN or carburizing character KC can be adjsuted and controlled as well as, if necessary, the carburizing character KC considering the unburnt gas compound.
Technical Data QE-Probe XS11.QE
Length300...1800 mm
Diameter25 mm
Weight1...3.5 kg
Material1.4841
Dimensions clamp headapprox. 90x90x200
Protection degreeIP20
Power supply24 V (DC or AC)
Heating resistance AC / DC20 Ω
Heating current AC / DC1.2 A
Heating power AC / DC30 VA
Range0...1500mV
Accuracy< 5 % rel. error
Sensor temperature
(in the probe head)760 °C
Offset<10 mV
Thermocoupletype B (800 °C corresponds to 3.2 mV)
Flow measuring gasmax. 1 l/h
Mounting recommendation:
stuffing box or cutting ring fitting
Probe Electronics E2000
General Information
The electronic unit E2000 is a comfortable device for the use of ZIROX oxygen probes.
The signals of ZIROX probes are recorded with the E2000, processed to the oxygen concentration (normally in Vol.-%) according to the NERNST equation and provided by standard interfaces.
The electronic unit E2000 supplies the probe with reference air via internal pump.
Additionally, the E2000 accomplishes the power supply and the heating control for heated ZIROX probes. Furthermore, the probes are monitored by the E2000 via cyclic measurements of the cell resistance. An error message is displayed, as necessary.
The user can program two limit values (output via relay).
In incompletely burnt gases (reducing conditions) more values can be calculated (air factor , dew point, H2O/H2-ratio, CO2/CO-ratio, c(CO2) and c(H2O) in the water gas equilibrium. Precondition: known fuel gas composition, e.g. C/H-ratio.
If requested, the E2000 can be delivered with an automatic calibration function.
Features
Signal processing and display of ZIROX probes measuring values
Calibration and monitoring function for ZIROX probes
Measuring value output via standard interfaces
Process monitoring via standard interfaces
Customized solutions
Auto-calibration function (option)
Technical Data Probe Electronics E2000
Signal inputcell und thermal voltage ZIROX probes
Range0...20.64 Vol.-% O2 (up to 100 Vol.-% on request)
Accuracyrel. error < 5 %
Reference gas supplyvia internal pump (flow monitored)
Plain text displayLCD dot-matrix
Keypad6 membrane keys
Digital interfaceRS232
Output2 potential free current outputs 0/4...20 mA, adjustable (alternative: voltage output 0...5/10 V) 2 programmable limit values (relay output) alarm message (relay output)
Power supply110-230 V, 50-60 Hz
Dimensions300 x 300 x 120 mm3
Weightapprox. 4 kg
Protection degreeIP65
Working temperature0...+50 °C, 0...95 % rel. humidity
Storage temperature-20...+60 °C, 0...95 % rel. humidity
Probe Electronics E2010
General Information
The electronic unit E2010 is the basic device for the use of ZIROX oxygen probes.
The signals of ZIROX probes are recorded with the E2010, processed to the oxygen concentration according to the NERNST equation and provided by standard interface (4-20 mA). The E2010 realizes the power supply and the heating control for heated ZIROX probes.
Features
Signal processing and measuring value display for ZIROX probes
Measuring value output via standard interface
Power supply and heating control for heated ZIROX probes
Technical Data Probe Electronics E2000
Signal inputcell und thermal voltage ZIROX probes
Range0...20.64 Vol.-% O2 (up to 100 Vol.-% on request)
Accuracyrel. error < 5 %
Reference gas supplynone, must be supplied by user
Plain text displayLCD dot-matix, 2 x 16 characters
Keypad2 membrane keys
Output4...20 mA (corresponds to 0...20 Vol.-% O2)
Power supply24 V DC +/- 10 %, 5 A
Dimensions96 x 96 x 125 mm3
Weightapprox. 650 g
Protection degreeIP30 (Front IP52)
Working temperature0...+40 °C, 0...95 % rel. humidity
Storage temperature-20...+50 °C, 0...95 % rel. humidity
Probe Electronics E713
General Information
The electronic unit E713 is the basic device for the use of ZIROX® oxygen probes.
The signals of ZIROX® probes are recorded with the E713, processed to the oxygen concentration according to the NERNST equation and provided by standard interface (4-20 mA). The E713 realizes the power supply and the heating control for heated ZIROX® probes.
Features
Signal processing and measuring value display for ZIROX® probes
Measuring value output via standard interface
Power supply and heating control for heated ZIROX® probes
Technical Data Probe Electronics E713
Signal inputcell und thermal voltage ZIROX® probes
Range0...20.64 Vol.-% O2 (up to 100 Vol.-% on request)
Accuracyrel. error < 5 %
Reference gas supplynone, must be supplied by user
Plain text displayLCD dot-matrix, 2 x 16 characters
Keypad2 foil keys
Output4...20 mA (corresponds to 0...20 Vol.-% O2)
Power supply24 V DC +/- 10 %, 5 A
Dimensions96 x 96 x 150 mm3
Weightapprox. 0.3 kg
Protection degreeIP22
Working temperature0...+40 °C, 0...95 % rel. humidity
Storage temperature-20...+50 °C, 0...95 % rel. humidity
PM.21
General Information
The electronic unit E713 is the basic device for the use of ZIROX® oxygen probes. The signals of ZIROX® probes are recorded with the E713, processed to the oxygen concentration according to the NERNST equation and provided by standard interface (4-20 mA). The E713 realizes the power supply and the heating control for heated ZIROX® probes.
Technical Data Probe Electronics E713
Signal inputcell und thermal voltage ZIROX® probes
Range0...20.64 Vol.-% O2 (up to 100 Vol.-% on request)
Accuracyrel. error < 5 %
Reference gas supplynone, must be supplied by user
Plain text displayLCD dot-matrix, 2 x 16 characters
Keypad2 foil keys
Output4...20 mA (corresponds to 0...20 Vol.-% O2)
Power supply24 V DC +/- 10 %, 5 A
Dimensions96 x 96 x 150 mm3
Weightapprox. 0.3 kg
Protection degreeIP22
Working temperature0...+40 °C, 0...95 % rel. humidity
Storage temperature-20...+50 °C, 0...95 % rel. humidity
Analyzers
Oxygen Analyzer SGM5
General Information
The compact high-precision oxygen analyzer SGM5T contains the approved calibration- and drift-free ZIROX zirconia measuring cell as well the electronic unit (for cell heating control, flow monitoring, cell signal processing, calculations and signal output, e.g. oxygen concentration, air factor , redox-quotient or H2O/H2-ratio). A microprocessor changes the cell signal to the oxygen concentration according to the NERNST equation. The value is displayed as an analog current signal (option: digital interface RS232, software for measuring value recording and storage is available). In addition, the electronic unit can process and provide the signals of another, optionally integrable sensor (e.g. CO2-, humidity- or pressure sensor with standard interface).
The oxygen analyzer SGM5S was especially developed for measurements in CO2-atmosphere of breweries. It contains additional parts for gas filtering and pressure reduction.
In the SGM5, the measuring cell is continuously monitored. In case of an error, an alarm signal is generated.
Applications
In many technological processes under protective or inert gases, oxygen traces are disadvantageous for the product properties. Precondition for detection and prevention of problems is the fast and precise measurement of oxygen and the determination of the reducing force of inert gases respectively. Due to the increasing adoption of a quality management system (e.g. ISO 9000), a constant monitoring and documentation of quality parameters becomes more important. The SGM5 provides various options for process optimization (soldering and welding processes, heat treatment of metallic surfaces, microelectronic production, food packing technology). For the monitoring of reducing gases, further parameters (redox-quotient, air factor λ, H2O/H2-ratio or CO2/CO-ratio) can be calculated by special mathematical methods.
Technical Data Oxygen Analyzer SGM5T
Range2.0 · 105...0.1 Vol.-ppm, (20.6...10-4 Vol-%) measurements up to 10-20 Vol.-ppm on request (reducing conditions),
range up to 100 Vol.-% on request
Signal output4-20 mA (0-5 V, 0-10 V on request)
Accuracy at normal pressurerel. error < 3% for 2 · 105... 10 ppm
rel. error < 5% for 10 ... 0.1 ppm
Gas flow5...10 l/h
Max. measuring gas pressure100mbar overpressure, at higher pressures a pressure reducing is required (e.g. by hand-operated needle valve), (more than 1 kPa overpressure: an error correction is required)
Max. measuring gas temperature80 °C at gas input
Pressure drop over measuring cellapprox. 1 kPa (100 mm WS) at 10 l/h
Dimensions (DxWxH)320 mm x 240 mm x 90 mm
Weight4 kg
Protection degreeIP 30
Working conditions10...40 °C, rel. humidity < 80% at 20 °C
Storage conditions-20...60 °C, rel. humidity < 95% at 20 °C
Power supply
Voltage
Power consumption
Heating measuring cell
110...230 V/50 ... 60 Hz
30 VA
24 V DC, ca. 15 W (internally controlled)
Keypad and display
Keypad
Plain text display
membrane keypad with 6 keys
LCD dot-matrix
Digital interfaceRS232
Oxygen Analyzer SGM7
General Information
For optimum quality and process protection, the avoidance of oxygen, also as traces, is necessary in many technological applications. Due to the increasing adoption of a quality management system (e.g. ISO 9000), a constant monitoring and documentation of quality parameters becomes more important.
The compact oxygen analyzer SGM7 is based on the approved, drift-, calibration- and maintenance-free ZIROX® zirconia technique. It contains the measuring cell as well as the electronic unit for cell heating control, flow monitoring, integrated pump and signal processing.
Via microprocessor, the measuring cell signal is processed according to the NERNST equation. The requested value is displayed as an analog current signal.
(Option: digital interface RS232 with software).
In the SGM7, the measuring cell is monitored continuously. In case of an error, an alarm signal is generated.
Applications
Protective gas monitoring in the food industry
Measurements in CO2-applications of breweries
Protective gas monitoring in the soldering and welding technology (SGM7.2.4)
Production processes in the microelectronics
Technical Data Oxygen Analyzer SGM7
Range2.0 · 105...1 Vol.-ppm, (20.6...1x10-4 Vol-%),
up to 10-20 Vol.-ppm possible (reducing conditions), range up to 100 Vol.-% on request
Accuracyrel. error < 5%
Gas flow5 ... 10 l/h
Max. measuring gas pressure20 mbar overpressure
Max. measuring gas temperature80 °C at gas input
Pressure drop over measuring cellapprox. 1 kPa (100 mm WS) at 10 l/h
Dimensions (W x H x D)135 mm x 100 mm x 240 mm
Weight3kg
Protection degreeIP 40
Gas inputSwagelok® 3 mm
Gas outputtube nipple 3 mm
Working conditions10...45 °C, rel. humidity < 80% at 20 °C
Storage conditions-20...60 °C, rel. humidity < 95% at 20 °C
Power supply
Voltage
Power consumption
Heating measuring cell
100 - 240 V AC, 47 - 63 Hz
20 VA
24 V DC, ca. 10 W (internally controlled)
Keypad and display
Keypad
Plain text display
3 keys
LCD dot-matrix
InterfaceRS232
Analog output
Current output
Option: Voltage output
0/4...20 mA, galvanically isolated, freely scalable, working resistance max. 500 Ω
0/2...10 V, galvanically isolated, freely scalable
Oxygen Measuring Module ZR5
General Information
For optimum quality and process protection, the avoidance of oxygen, also as traces, is necessary in many technological applications. Due to the increasing adoption of quality management systems (e.g. ISO 9000), a constant monitoring and documentation of quality parameters becomes more important. The oxygen measuring module ZR5 is based on the approved zirconia technology. It serves the continuous measurement of oxygen concentration in industry and laboratory gases and the monitoring of protective gases. Deviations of the oxygen concentration from set points can be signalized, the ZR5-module can monitor the procedure of special production processes under inert gas.
Applications
Protective gas monitoring in food processing, e.g. in packaging
Protective gas monitoring in technological processes, e.g. soldering, welding
Monitoring tasks in microelectronic manufactures
Monitoring of protective and inert gases in surface treatment processes
Technical Data Oxygen Measuring Module ZR5
Sensorpotentiometric zirconia cell
Range1 Vol.-ppm...100 Vol.-%, 10-15
Vol.-ppm...20.6 Vol.-%(1)
Accuracyrel. error < 5 %
T90T90 ≤ 1 s (measuring cell without tube)
Housing19''-slot (21 TE)
Gas connectioninput: Swagelok 3 mm,
output: tube nipple 4 mm
Gas flow8 ± 2 l/h, controlled via internal pump
(can be turned off)
Signal outputanalog: 0/4...20 mA for O2
(digital: RS 232 as option)
Power supply24 V DC (± 20 %)
DisplayLED for failure display only
Protection degreeIP20
Working conditions0...50 °C, max. 80 % rel. humidity
Storage conditions-20...60 °C, max. 95 % rel. humidity
Dimensions (W x H x D)100 mm x 105 mm x 170 mm
Warm-up< 15 min
Power consumptionapprox. 20 W
(1) On request (for reducing gas mixtures)
Special Measuring Systems
Selected Devices
Lambda Measuring System
This device serves the measurement of the air factor λ in gas combustion equipments.
For correct application a detailed consulting by manufacturer is necessary.
Please contact us by e-mail.
SWM2000
Oxygen Hydrogen Measuring Device. Main parts are a zirconia oxygen sensor and a TCD for
the hydrogen detection. Additionally, further thermodynamic values (or data) can be calculated on the basis of the oxygen/hydrogen measurement. We provide more information on request. Please contact us by e-mail.
SGM5-NGW
This device serves the determination of the Non-Equilibrium-Oxygen (NGW-Sauerstoff in German) in reducing atmosphere. It is mainly used in applications where the equilibrium oxygen cannot be used as target value. As for the devices before, a detailed consulting is necessary for correct application. Please contact us per e-mail.
EC-Module
Inexpensive oxygen measuring device based on aqueous electrolyte systems. It is mainly used for the oxygen detection in the percent range. For further information contact us by e-mail please.
H2-Measuring Device TCS
General Information
The hydrogen sensor TCS (thermal conductivity sensor) is a compact measuring device, which is directly mounted on the measuring chamber by vacuum components.
The sensor is pre-thermostatted by its own electronics, whereby a very high stable sensor signal is ensured.
Originally developed for nitriding equipment of contract heat treatment workshops, the sensor is applicable for special measuring problems (e.g. low pressure application) due to a sophisticated calibration method.
Applications
In many technological processes, hydrogen plays a big role in achieving the desired product properties. By means of TCS, the hydrogen concentration can be monitored and/or provided to the process control via standard interfaces.
Due to the increasing adoption of quality management systems (e.g. ISO 9000), a constant monitoring and documentation of quality parameters becomes more important.
With the TCS, the user can monitor hydrogenous atmospheres efficiently and continuously.
Technical Data H2-Measuring Device TCS
Range0...100 Vol.-%
Accuracyrel. error < 5 %
Response timet90 (sensor) approx. 180 s (depends on gas distribution at measuring chamber)
Sensor temperature50 °C (pre-thermostatted, electronically controlled)
Dimensions (WxHxD)80 mm x 125 mm x 83 mm
Signal outputanalog output 0/4-20 mA (scaling by software) and serial interface RS232 (0-5/10 V on request)
Power supply24 V DC +/- 20 %, approx. 20 W
Displaynone, operation via software
Protection degreeIP 65
Ambient temperature10...50 °C, rel. humidity 0...95 % at 20 °C
Storage temperature-20...60 °C, rel. humidity 0...95 % at 20 °C
Gas connectionvia DIN40KF (others on request)
Gas supplyvia diffusion (Gas distribution at measuring chamber)
Ambient pressure950...1100 hPa (Low pressure applications need special calibration) Note: Measuring value depends on pressure
Warm-up10 min.
Calibrationfirst calibration (characteristic line determination) by manufacturer, a 2-point-calibration approx. every 3 month (process pressure must be known and provided to manufacturer) by user
Mountingno requirements
Cross-sensitivityGases with high thermal conductivity falsify the measuring result
Elektrolysis
General Information
The electrolysis device SGM5EL is based on the approved zirconia solid electrolyte technology.
It serves the convenient dosing or removal of oxygen from protective gases (N2, Ar) or reactive gas flows (e.g. inert gas N2/H2) in order to produce gases with defined oxygen concentration or gases with a requested reduction force.
The SGM5EL is a combination of a complex cell module with a control unit. Main parts of the cell module are an electrolysis cell and a potentiometric measuring cell. The potentiometric cell allows an exact measurement of the oxygen concentration adjusted by electrolysis cell. The necessary cell temperature is guaranteed by an electrical heating.
Besides its application as a test gas generator, the SGM5EL can be used for the solid electrolyte coulometry. In this case, the cell voltage of the potentiometric cell is kept constant as a set point of a control circuit. The resulting current of the electrolysis cell is proportional to the oxygen transposition with the gas flow. The current-time integral helps to quantify the substituted amount of oxygen.
For the oxygen pump performance (volume flow of transported oxygen at 25 °C and normal pressure), the following equation applies:
V(O2) / t = 0.06339 · I cm3 / A s = 0.2282 · I l / A h
Applications
Production of defined test gases, e.g. for sensor tests
Examination of oxygen permeation of polymers (e.g. foils)
Controlled outgassing of reactors
Calibration and monitoring of TA-Systems (TG, DTA, TMA, DSC)
Examination of the decomposition gases of thermal analysis
Technical Data Electrolysis Device SGM5EL
Range (Measuring cell)20.64*104...0.5 Vol.-ppm O2,
up to 10-24 Vol.-ppm possible
Carrier gas (for electrolysis)protective gas (N2, Ar, CO2) or inert gas
Accuracyrel. error <5%
Test gas flow5...10 l/h
Max. test gas pressure100 mbar over pressure
Max. test gas temperature80 °C at gas input
Pressure drop over cell moduleapprox. 1 kPa (100 mm WS) at 10 l/h
Dimensions (T x B x H)electronic unit: 320 x 240 x 90 mm3
cell module: 262 x 119 x 119 mm3
Weightelectronic unit: 2.5 kg
cell module: 1.5 kg
Gas connection3 mm Swagelok®, others on request
Protection degreeelectronic unit: IP 30
cell module: IP 20
Working conditions10...40 °C, max. 80 % rel. humidity
Storing conditions-20...60 °C, max. 95 % rel. humidity
InterfaceRS232
Power supply110...230 V/50 ... 60 Hz
Power consumption50 VA
Keypadmembrane keypad (6 keys)
Plain text displayLCD dot-matrix
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