- 1 General Specifications
- 1.1 1.1. Casing Types
- 1.2 1.2. Dimensions
- 1.3 1.3. Assignment of Sensor Types to possible Sensor Combinations
- 1.3.1 Part 1: Pre‐configured SensorsIncl. casing type 1 with gas connection fittings, data port, power supply Ready for use
- 1.3.2 Part 2: Pre‐configured SensorsIncl. casing type 2 with gas connection fittings, data port, power supply Ready for use
- 1.3.3 Part 3: Individually combinable sensor modules Composition according Customer Specification Delivery incl. casing of suitable size according to number and type of modules Ready for use
- 1.3.4 Part 4: Casings for Sensor Modules assembled according to Customer Specification
- 1.3.5 Part 5 Built‐in Options
- 1.3.6 Part 6: Accessories / Options
- 2 Disadvantages of electrochemical (EC) sensors in comparison to the optical gas sensors RITTER »MultiGas«
- 3 Preventive / Protective Measures regarding the Gas to be measured
- 4 Scope of Supply
- 5 Setup
- 6 Infrared Sensors
- 7 Ultraviolet Sensors
- 8 Optionen (installed inside of the sensor casing)
General Specifications
1.1. Casing Types
1.2. Dimensions
| Casing Type 1 | Casing Type 2 | |
|---|---|---|
| A | 171 mm | 444 mm |
| B | 290 mm (1) | 305 mm |
| C | 86 mm | 145 mm |
| Weight, approx. (2) | 2+ kg | 6.5 – 8 kg |
| Connections gas in-/outlet | PVDF screw-type tube connection for tube Ø 4i / 6o mm | PVDF screw-type tube connection for tube Ø 4i / 6o mm |
| Interfaces | USB ( Standard) / RS232 ( Option) | USB ( Standard) / RS232 ( Option) |
| Power | 24 V DC | 24 V DC |
(2) Depending on type and number of built-in sensor modules
1.3. Assignment of Sensor Types to possible Sensor Combinations
- Part 1 – Pre‐configured sensors, incl. casing type 1 with gas connection fittings, data interface, plug‐in power supply – ready for use
- Part 2 – Pre‐configured sensors, incl. casing type 2 with gas connection glands, data interface, fittings, data interface, plug‐in power supply ‐ ready for use
- Part 3 – Individually combinable sensor modules, composition according to customer specification, delivery incl. housing in suitable size according to number and type of modules – ready for use
- Part 4 – Casings for sensor modules, assembled according to customer’s specification
- Part 5 – Built‐in options mounted inside of the casing
- Part 6 – Accessories / options
Part 1: Pre‐configured Sensors
Incl. casing type 1 with gas connection fittings, data port, power supply Ready for use
| Sensor Type: RITTER MultiGas xxx | Article No. | Group of Gases IR | Number of Detectable Gases in this Group | Group of Gases UV | Number of Detectable Gases in this Group |
|---|---|---|---|---|---|
| xxx = mono IR1 | 2678 | CO2 CO N2O CH4 CnHm* CF4 SF6 H2O | 1 | ||
| xxx = duo IR2 | 2742 | CO2 CO N2O CH4 CnHm* CF4 SF6 H2O | 2 | ||
| xxx = trio IR3 | 2743 | CO2 CO N2O CH4 CnHm* CF4 SF6 H2O | 3 | ||
| xxx = mono UV1 | 2749 | O3 Cl2 ≤ 5% SO2 NO2 | 1 | ||
| xxx = mono UV1 Cl2 30% | 2763 | Cl2 ≤ 30% | 1 | ||
| xxx = duo UV2 | 2766 | O3 Cl2 ≤ 5% SO2 NO2 | 2 | ||
| xxx = duo IR1 + UV1 | 2797 | CO2 CO N2O CH4 CnHm* CF4 SF6 H2O | 1 | O3 Cl2 ≤ 5% SO2 NO2 | 1 |
| xxx = trio IR1 + UV2 | na | CO2 CO N2O CH4 CnHm* CF4 SF6 H2O | 1 | O3 Cl2 ≤ 5% SO2 NO2 | 2 |
Part 2: Pre‐configured Sensors
Incl. casing type 2 with gas connection fittings, data port, power supply Ready for use
| Sensor Type: RITTER MultiGas xxx | Article No. | Group of Gases IR | Number of Detectable Gases in this Group | Group of Gases UV | Number of Detectable Gases in this Group |
|---|---|---|---|---|---|
| xxx = mono UV1 H2S ≤ 5.000 ppm | 2672 | H2S ≤ 5.000ppm | 1 | ||
| xxx = mono UV1 H2S ≤ 1% | 2855 | H2S ≤ 1% | 1 | ||
| xxx = UVRAS | 2812 | SO2 NO2 NO | 1 | ||
| xxx = duo IR1 + H2S ≤ 5000 ppm | 2959 | CO2 CO N2O CH4 CnHm* CF4 SF6 H2O | 1 | H2S | 1 |
| xxx = duo IR1 + (H2S ≤1% / NO) | 2960 | CO2 CO N2O CH4 CnHm* CF4 SF6 H2O | 1 | H2S ≤ 1% NO | 1 |
Part 3: Individually combinable sensor modules
Composition according Customer Specification
Delivery incl. casing of suitable size according to number and type of modules Ready for use
| Sensor Type: RITTER MultiGas xxx | Article No. | Group of Gases IR | Number of Detectable Gases in this Group | Group of Gases UV | Number of Detectable Gases in this Group |
|---|---|---|---|---|---|
| xxx = Mod IR1 | 2813 | CO2 CO N2O CH4 CnHm* CF4 SF6 H2O | 1 | ||
| xxx = Mod IR2 | 2814 | CO2 CO N2O CH4 CnHm* CF4 SF6 H2O | 2 | ||
| xxx = Mod IR3 | 2815 | CO2 CO N2O CH4 CnHm* CF4 SF6 H2O | 3 | ||
| xxx = Mod UV1 | 2830 | O3 Cl2 ≤ 5% SO2 NO2 | 1 | ||
| xxx = Mod UV1 Cl2 30% | na | Cl2 ≤ 30% | 1 | ||
| xxx = Mod UV1 H2S ≤ 5.000 ppm | 2841 | H2S | 1 | ||
| xxx = Mod UV1 H2S ≤ 1% | 2856 | H2S | 1 | ||
| xxx = Mod UV2 | 2831 | O3 Cl2 ≤ 5% SO2 NO2 | 2 | ||
| xxx = Mod UVRAS | 2917 | SO2 NO2 NO | 3 |
Part 4: Casings for Sensor Modules assembled according to Customer Specification
| Casing Type: RITTER MultiGas xxx | Article No. | Casing Type | Suitable for |
|---|---|---|---|
| xxx = Cas-2 (1) | 2817 | Casing type 2 | … multiple modules up to 444 x 145 x 305 mm |
| xxx = Cas-3 (1) | 2818 | Casing type 3 | … multiple modules up to 464 x 189 x 305 mm |
Part 5 Built‐in Options
| Option Type: RITTER MultiGas xxx | Article No. | Name | Messbereich |
|---|---|---|---|
| xxx = O2 (2) (3) | 2767 | Oxgen Sensor | 0 – 100% |
| xxx = O2-resist (3) | 2824 | Oxygen Sensor, H2S resistant | 0.5 – 35% |
| xxx = P (2) (3) | 2771 | Pressure Sensor | 800 – 1200 mbar abs.[/wpml-string] / Resolution <1 mbar |
| xxx = P-resist (3) | 2825 | Pressure Sensor, H2S resistant | 0.2 – 3.5 bar abs. / Resolution 2 mbar |
| xxx = H (2) (3) | 2773 | Humidity Sensor | 0 – 100% RH |
| xxx = A/O | 2648 | Analog Voltage Output 0-2V / 0-5V / 0-10V | 4 Analog output ports for 4 separate gas concentrations, 16 bit |
| xxx = Therm-Cas | 2954 | Thermostated Casing | Heating and thermostatting of the sensor casing at 50°C |
(2) Not suitable for SO2, Cl2, H2S
(3) Available as supplement to IR or UV sensor only
Part 6: Accessories / Options
| Option Type: RITTER MultiGas xxx | Article No. | Name | Range |
|---|---|---|---|
| xxx = Cal-ZP-N2 | 2805 | Calibration Gas N2 | For zero-point calibration of all gases |
| xxx = Flow-V | 2806 | Mini Flow Valve | Control of flow rate, incl. Manometer for calibration gas bottle |
| xxx = Cal-CG-Cat1 | 2948 | Calibration with special carrier gas (Ar, H2, He) for gases category 1 | Category 1 gases: CO2 CO < 0Vol-% N2O CH4 CnHm* CF4 SF6 O3 CL2 SO2 < 10Vol-% NO2 NO |
| xxx = Cal-CG-Cat2 | 2949 | Calibration with special carrier gas (Ar, H2, He) for gases category 2 | Category 2 gases: CO > 10Vol-% H2S SO2 > 10Vol-% |
| xxx = Cal-ReCal-Cat1 | 2950 | Calibration for gases category 1 | Category 1 gases: CO2 CO < 0Vol-% N2O CH4 CnHm* CF4 SF6 O3 CL2 SO2 < 10Vol-% NO2 NO |
| xxx = Cal-ReCal-Cat2 | 2951 | Calibration for gases category 2 | Category 2 gases: CO > 10Vol-% H2S SO2 > 10Vol-% |
Infrarot-Modul NDIR Ultraviolett-Modul NDUV Ultraviolett-Modul NDUV / UVRAS
* Kalibrierung mit Propan
Disadvantages of electrochemical (EC) sensors in comparison to the optical gas sensors RITTER »MultiGas«
Preventive / Protective Measures regarding the Gas to be measured
Important: Please specify the desired options when ordering
a) Additional tube connection for flushing of the casing
The gas lines inside the casing and the measuring cuvette are gas-tight by means of O-rings and other gas-tight connections. However, as with all connections, a leakage rate, however slight, cannot be ruled out. With an additional tube connection for flushing of the casing, an accumulation of the measuring gas inside the casing can be prevented.
In the case of toxic or aggressive gases, a suction line can be connected via this tube connection, which creates a under-pressure inside the housing thus preventing the gas from escaping from the casing.
In case of ignitable gases (methane, hydrogen, etc.), a pressure or suction line can be connected via this tube connection creating an over- or under-pressure inside the casing thus preventing the accumulation of an ignitable gas mixture.
Achtung: H2S can be perceived as an unpleasant smell even in the ppb range. Even with an O-ring seal, micro-leaks can occur, which can be extracted by flushing the housing.
b) Heated and thermostatted casing
A condensation of the measuring gas inside of the sensor must be prevented. This is done in general for example by a condensation trap or gas cooler.Alternatively, the inside of the sensor casing can be heated and thermostatted at 50°C (standard). The heating not only avoids condensation inside of the sensor but ensures constant measurement results as well.
c) Particle filter
Please make sure by use of a suitable filter that no particles are carried into the sensor. These might block the small orifices of the internal fittings. It is recommended to use filters of 5 micron or smaller.
Scope of Supply
| No. of Items | Item |
|---|---|
| 1 | Document folder including : Calibration Certificate / Datenblätter / Software Manual |
| 1 | Sensor in table top casing |
| 1 | Power adapter |
| 1 | Data acquisition software (on USB memory card) 1 USB connection cable (sensor computer ) |
| 3m | Viton tubing Øi 4mm/Øo 6mm |
Setup
- Unpack all items carefully
- Install the data acquisition software according to the “RITTER MultiGas Software Manual”.
Don’t start the software at this point in time. - Place the sensor next to the gas source
Bitte beachten: A tube connection between gas source and sensors that is as short as possible allows a small dead space created by the tubing. In turn, a small dead space enables a fast response time of the sensor. - Connect the power adapter to socket “DC 24 V” at the rear side of the sensor and to mains.
- Connect the data acquisition cable to the respective socket at the rear side of the sensor and to the computer:
- USB cable to the socket “USB”
- RS232 cable to the socket “RS 232” (option )
- Connect the gas source to the gas inlet port of the sensor by using the provided tubing as follows:
- Unscrew the screw cap from the gas inlet port.
- Slide the screw cap onto the end of the tube with the thread of the screw cap facing the tube end.
- Push the tube onto the cone in the center of the gas inlet port.
- Slide the screw cap to the gas inlet port and screw it hand-tightly in place.
- Falls zutreffend: Verbinden Sie den Gasausgang des Sensors mit anderen Komponenten wie Gasspeicherbeuteln, Abgasschläuchen usw.
- Switch-on the power switch at the front side of the sensor casing.
- Start the software and open the COM port(s) of the connected sensor module(s) according to the software manual.
The RITTER »MultiGas« Sensor is now ready for use.
Infrared Sensors
Beschreibung
Gas analysis based on the NDIR technique is an established method to determine the concentrations of gases in complex mixtures. The RITTER »MultiGas« sensors use new optical components for optimal analysis results: Up to 3 optical filters analyse the gas which flows through the sensor as one gas stream. The optional oxygen, pressure, and humidity sensors are in-line with the same single gas stream.
The individual internal modules are sealed by means of O-ring connections.
In order to achieve an optimum adaptation to the required measuring range, the lengths of the modular measurement cells (= cuvettes) can be implemented in the range of 5 mm (large measurement range in percentage level) up to 250 mm (small measurement range in ppm level).
Cuvettes with a length ≥ 20 mm are coated with a resistant gold layer in order to improve the reflection properties for low concentration level detection. Cuvettes used with aggressive gases are gold-coated as well.
The other internal mechanical parts are made out of aluminium, optionally out of stainless steel.
For fast response applications the measuring system delivers a stable result within t90 ≈ 3 seconds.
The entire unit can be disassembled for easy maintenance/service.
Anwendungen
Specifications
General features
| Messverfahren: | Innovative NDIR Sensor (non-dispersive infrared sensor) |
| Detectable gases: | CO2 CO N2O CH4 CnHm* CF4 SF6 H2O |
| Number of simultaneously detectable gases: | max. 3 per sensor unit |
| Measurement ranges: | See below |
| Volumenstrom-Bereich: | 5 ~ 300 ltr/h – For higher flow rates the sensor can be operated in bypass |
| Max. gas inlet pressure: | 300 mbar |
| Pressure loss (without additional optional sensors): | 10 @ 100 / 35 @ 200 / 70 @ 300 (mbar @ ltr/h) |
| Temperature compensation: | Yes |
| Datenerfassungs-Software: | Yes |
| Lifetime of IR radiation source: | > 40 000 h |
| Measurement cuvette: | Aluminium, with measurement ranges ≤1% gold-plated inside |
| Cuvette sealing: | Viton O-ring |
| Gehäuse: | High-quality table-top casing, aluminium |
| Dimensions (W x H x L): | 171 x 86 x 290 mm |
| Gewicht: | approx. 2 kg |
| Gas connections: | PVDF screw-type tube connection for tube Øi 4mm, Øo 6 mm |
Measuring response
| Linearity error: | < ± 1% F.S. |
| Repeatability: | ± 0.5% F.S. |
| Long term stability zero: | < ± 2% F.S. / week |
| Long term stability span: | < ± 2% F.S. / month |
| Temperature influence of zero point: | < 1% F.S. / 10K |
| Temperature influence of span: | < 2% F.S. / 10K |
| Cross sensitivity: | < 2% F.S. |
| Pressure influence: | < 1.5% / 10hPa of reading |
| Aufwärmzeit: | 2 min |
| Ansprechzeit (t90): | ≈ 3 sec |
| Sampling frequency by software: | ≤ 10 Hz |
| Detection limit: | See below |
| Resolution: | 0.5 x detection limit |
| Water vapour: | No influence with measurements of CO2 and CH4 |
Electrical features
| Spannungversorgung: | 24 VDC inkl. Steckernetzteil 100 ~ 240 VAC / 24 VDC |
| Average power consumption: | < 1W |
| Schnittstelle: | USB (standard), RS232 (option) – incl. data transmission cable 1 m |
| Analogue voltage output (option): | 0-2V / 0-5V / 0-10V |
Climatic conditions
| Max. Betriebstemperatur: | +15 ~ +45 °C |
| Storage temperature: | –20 ~ +60 °C |
| Betriebsdruck: | 800 ~ 1200 hPa (mbar) |
| Ambient humidity: | 0 ~ 95% rel. humidity // Condensing inside of sensor must be prevented! |
* Analysis of CnHm*
The calibration of sensors for CnHm will be performed with propane. Aromatic hydrocarbons are also measured but with a different weighting. This means that the sensitivity of the sensor is significantly smaller with these gases than with other hydrocarbons.
Tabelle der Messbereiche
Messbereiche / Messbereichs-Endwert (F.S.) 100 Vol.% 50 Vol.% 30 Vol.% 20 Vol.% 10 Vol.% 5 Vol.% 1 Vol.% 5.000 ppm 2.000 ppm 1.000 ppm 500 ppm 300 ppm 100 ppm 50 ppm 10 ppm CO2 CO N2O CH4 CnHm* CF4 SF6 H2O Weitere Messbereiche auf Anfrage
Infrarot-Modul NDIR Ultraviolett-Modul NDUV Ultraviolett-Modul NDUV / UVRAS
* Kalibrierung mit Propan
Table of Detection Limits (= 3 σ) in Percent of Full Scale
Nachweisgrenzen / % vom Messbereichs-Endwert (F.S.) 100 Vol.% 50 Vol.% 30 Vol.% 20 Vol.% 10 Vol.% 5 Vol.% 1 Vol.% 5.000 ppm 2.000 ppm 1.000 ppm 500 ppm 300 ppm 100 ppm 50 ppm 10 ppm CO2 < 0,1% < 0,1% < 0,1% < 0,1% < 0,1% < 0,1% < 0,1% < 0,1% < 0,1% < 0,1% < 0,3% < 0,3% CO < 0,2% < 0,2% < 0,2% < 0,2% < 0,2% < 0,2% < 0,2% < 0,3% < 0,5% < 0,5% N2O < 0,1% < 0,1% < 0,1% < 0,1% < 0,1% < 0,1% < 0,1% < 0,3% CH4 < 0,1% < 0,1% < 0,1% < 0,1% < 0,1% < 0,1% < 0,1% < 0,3% < 0,5% CnHm* < 0,1% < 0,1% < 0,1% < 0,2% < 0,2% < 0,2% < 0,2% < 0,5% < 0,5% CF4 < 0,2% < 0,2% < 0,2% SF6 < 0,1% < 0,1% < 0,1% < 0,2% < 0,5% < 0,3% < 0,3% H2O Weitere Messbereiche auf Anfrage
Infrarot-Modul NDIR Ultraviolett-Modul NDUV Ultraviolett-Modul NDUV / UVRAS
* Kalibrierung mit Propan
Definition der Nachweisgrenze
Die Nachweisgrenze ist der kleinste Messwert, der mit einer bestimmten Unsicherheit ermittelt werden kann. Diese Unsicherheit beinhaltet die Auflösung, das Rauschen und die Stabilität des Gassensors für ein bestimmtes Gas und einen bestimmten Messbereich. Zur Ermittlung der Nachweisgrenze werden mehrere Einzelmessungen unter identischen Messbedingungen durchgeführt. Mit den erhaltenen Werten der Einzelmessungen wird die Standardabweichung "Sigma" (σ) berechnet. Die in der Tabelle angegebenen Werte entsprechen dem dreifachen Betrag von Sigma.
Recalibrations
The following recalibration intervals are recommended for IR sensors:
Ultraviolet Sensors
Beschreibung
The RITTER »MultiGas« UV sensor is the world’s first gas analysis module based on miniaturized UV-LEDs. The stability and lifetime of these UV-LEDs enables high-precision gas analyses down to the ppm range. By using two UV-LEDs two gases can be detected simultaneously. Furthermore, with this approach measuring ranges from ppm to Vol.-% can be realized.
In the spectral range from 200 nm to 500 nm, nitrogen oxides (NO + NO2), aromatic hydrocarbons, hydrogen sulphide, ozone, sulphur dioxide and chlorine can be reliably detected with this new sensor platform.
The entire unit can be disassembled for easy maintenance/service.
The individual internal modules are sealed by means of O-ring connections.
In order to achieve an optimum adaptation to the required measuring range, the lengths of the modular measurement cells (= cuvettes) can be implemented in the range of 5 mm (large measurement range in percentage level) up to 250 mm (small measurement range in ppm level).
Cuvettes with a length ≥ 20 mm are coated with a resistant gold layer in order to improve the reflection properties for low concentration level detection. Cuvettes used with aggressive gases are gold-coated as well.
The internal mechanical parts are made out of aluminium, optionally out of stainless steel.
For fast response applications the measuring system delivers a stable result within t90 ≈ 1-2 seconds.
Anwendungen
Specifications NDUV Sensor
General features
| Messverfahren: | Innovative NDUV Sensor (nicht-dispersiver UV-Sensor) |
| Detectable gases: | O3 CL2 H2S SO2 NO2 |
| Number of simultaneously detectable gases: | max. 2 |
| Measurement ranges: | See below |
| Volumenstrom-Bereich: | 1 ltr/d ~ 300 ltr/h – For higher flow rates the sensor can be operated in bypass |
| Max. gas inlet pressure: | 300 mbar |
| Pressure loss (without additional optional sensors): | 10 @ 100 / 35 @ 200 / 70 @ 300 (mbar @ ltr/h) |
| Temperature compensation: | Yes |
| Datenerfassungs-Software: | Yes |
| Lifetime of UV radiation source: | > 8 000 h |
| Measurement cuvette: | Stainless steel with silicone coating inside |
| Cuvette sealing: | Viton O-ring |
| Gehäuse: | High-quality table-top casing, aluminium |
| Dimensions (W x H x L): | 464 x 189 x 305 mm |
| Gewicht: | approx. 6.5+ kg |
| Gas connections: | PVDF screw-type tube connection for tube Øi 4mm, Øo 6 mm |
Measuring response
| Linearity error: | < ± 1% F.S. |
| Repeatability: | ± 0.5% F.S. |
| Long term stability zero N2: | < ± 1% F.S. / 24h |
| Long term stability span: | < ± 1% F.S. / month |
| Temperature influence of zero point: | < 1% F.S. / 10K |
| Temperature influence of span: | < 2% F.S. / 10K |
| Cross sensitivity: | < 2% F.S. |
| Pressure influence: | < 1.5% / 10hPa of reading |
| Aufwärmzeit: | 1 min (initial), <60 min for full specification |
| Ansprechzeit (t90): | 1.5 – 15 sec |
| Sampling frequency by software: | ≤ 10 Hz |
| Detection limit: | See below |
| Resolution: | 0.5 x detection limit |
Electrical features
| Spannungversorgung: | 24 VDC inkl. Steckernetzteil 100 ~ 240 VAC / 24 VDC |
| Supply current (peak) | <0.4 A |
| Average power consumption | < 7.5 W |
| Schnittstelle: | USB (standard), RS232 (option) – incl. data transmission cable 1 m |
| Analogue voltage output (option): | 0-2V / 0-5V / 0-10V |
Climatic conditions
| Max. Betriebstemperatur: | +25 ~ +45 °C |
| Storage temperature: | –20 ~ +60 °C |
| Betriebsdruck: | 800 ~ 1200 hPa (mbar) |
| Ambient humidity: | 0 ~ 95% rel. humidity // Condensing inside of sensor must be prevented! |
Specifications H2S Sensor
The H2S sensor works according to the principle of non-dispersive UV absorption (NDUV).
The measuring wavelength used is in the lower nanometer range, which enables inter-ference-free measurements with water vapour and hydrocarbons. This makes the sensor ideal for use in biogas measurements, as accompanying gases such as NH3, CO2, CH4 and H2O do not affect the accuracy of the measurements.
General features
| Messverfahren: | Innovative NDUV Sensor (nicht-dispersiver UV-Sensor) Dual beam |
| Detectable gases: | H2S SO2 |
| Number of simultaneously detectable gases: | max. 2 |
| Measurement ranges: | See below |
| Volumenstrom-Bereich: | 6 ~ 300 ltr/h – For higher flow rates the sensor can be operated in bypass |
| Max. gas inlet pressure: | 300 mbar |
| Pressure loss (without additional optional sensors): | 10 @ 100 / 35 @ 200 / 70 @ 300 (mbar @ ltr/h) |
| Temperature compensation: | Yes |
| Datenerfassungs-Software: | Yes |
| Lifetime of UV radiation source: | > 8 000 h |
| Measurement cuvette: | Stainless steel with silicone coating inside |
| Cuvette sealing: | Viton O-ring |
| Gehäuse: | High-quality table-top casing, aluminium |
| Dimensions (W x H x L): | 464 x 189 x 305 mm |
| Gewicht: | approx. 6.5+ kg |
| Gas connections: | PVDF screw-type tube connection for tube Øi 4mm, Øo 6 mm |
Measuring response
| Linearity error: | < ± 1% F.S. |
| Repeatability: | ± 0.5% F.S. |
| Long term stability zero N2: | < ± 1% F.S. / 24h |
| Long term stability span: | < ± 1% F.S. / month |
| Temperature influence of zero point: | < 1% F.S. / 10K |
| Temperature influence of span: | < 2% F.S. / 10K |
| Cross sensitivity: | < 2% F.S. |
| Pressure influence: | < 1.5% / 10hPa of reading |
| Aufwärmzeit: | 1 min (initial), < 15 min for full specification |
| Ansprechzeit (t90): | 1.5 – 15 sec |
| Sampling frequency by software: | ≤ 10 Hz |
| Detection limit: | See below |
| Resolution: | 0.5 x detection limit |
Electrical features
| Spannungversorgung: | 24 VDC inkl. Steckernetzteil 100 ~ 240 VAC / 24 VDC |
| Supply current (peak): | <0.4 A |
| Average power consumption: | < 7.5 W |
| Schnittstelle: | USB (standard), RS232 (option) – incl. data transmission cable 1 m |
| Analogue voltage output (option): | 0-2V / 0-5V / 0-10V |
Climatic conditions
| Max. Betriebstemperatur: | +5 ~ +45 °C |
| Storage temperature: | –20 ~ +60 °C |
| Betriebsdruck: | 800 ~ 1200 hPa (mbar) |
| Ambient humidity: | 0 ~ 95% rel. humidity // Condensing inside of sensor must be prevented! |
Specifications UVRAS Sensor
Für den Nachweis von NO wird eine elektrodenlose Gasentladungslampe (EDL) eingesetzt. In der EDL wird N2 und O2 zu NO umgewandelt und erzeugt selektive UV-Strahlung. Mit dieser Strahlung wird eine querempfindlichkeitsfreie NO-Messung ermöglicht. Dieses Verfahren wird als UV-Resonanzspektroskopie (UVRAS) bezeichnet.
A combination of both the UVRAS and NDUV technology allows the simultaneous gas analysis of NO, NO2 and SO2 in the lower ppm range which is particularly important in flue gas analysis (Continuous Emission Monitoring, CEM).
General features
| Messverfahren: | Innovative NDIR Sensor (non-dispersive infrared sensor) |
| Detectable gases: | SO2 NO2 NO |
| Number of simultaneously detectable gases: | max. 3 per sensor unit |
| Measurement ranges: | See below |
| Volumenstrom-Bereich: | 1 ltr/d ~ 300 ltr/h – For higher flow rates the sensor can be operated in bypass |
| Max. gas inlet pressure: | 300 mbar |
| Pressure loss (without additional optional sensors): | 10 @ 100 / 35 @ 200 / 70 @ 300 (mbar @ ltr/h) |
| Temperature compensation: | Yes |
| Datenerfassungs-Software: | Yes |
| Lifetime of IR radiation source: | > 40 000 h |
| Measurement cuvette: | Aluminium, with measurement ranges ≤1% gold-plated inside |
| Cuvette sealing: | Viton O-ring |
| Gehäuse: | High-quality table-top casing, aluminium |
| Dimensions (W x H x L): | 171 x 86 x 290 mm |
| Gewicht: | approx. 2 kg |
| Gas connections: | PVDF screw-type tube connection for tube Øi 4mm, Øo 6 mm |
Measuring response
| Linearity error: | < ± 1% F.S. |
| Repeatability: | ± 0.5 % F.S. |
| Long term stability zero N2: | < 3 ppm / 24h |
| Long term stability span: | < ± 1 % F.S. / month |
| Temperature influence of zero point: | < 1 % F.S. / 10 K |
| Temperature influence of span: | < 2 % F.S. / 10 K |
| Cross sensitivity: | |
| Pressure influence: | < 1.5% / 10 hPa of reading |
| Aufwärmzeit: | 1 min (initial), < 60 min for full specification |
| Ansprechzeit (t90): | 1.5 ~ 15 sec |
| Sampling frequency by software: | ≤ 10 Hz |
| Detection limit: | See below |
| Resolution: | 0.5 x detection limit |
Electrical features
| Spannungversorgung: | 24 VDC inkl. Steckernetzteil 100 ~ 240 VAC / 24 VDC |
| Supply current (peak): | 1.5 A |
| Inrush current: | 0.2 ~ 0.7 A |
| Power consumption: | 36 W |
| Schnittstelle: | USB (standard), RS232 (option) – incl. data transmission cable 1 m |
| Analogue voltage output (option): | 0-2V / 0-5V / 0-10V |
Climatic conditions
| Max. Betriebstemperatur: | +5 ~ +40 °C |
| Storage temperature: | –20 ~ +60 °C |
| Betriebsdruck: | 800 ~ 1200 hPa (mbar) |
| Ambient humidity: | 0 ~ 95% rel. humidity // Condensing inside of sensor must be prevented! |
Tabelle der Messbereiche
Messbereiche / Messbereichs-Endwert (F.S.) 100 Vol.% 50 Vol.% 30 Vol.% 20 Vol.% 10 Vol.% 5 Vol.% 1 Vol.% 5.000 ppm 2.000 ppm 1.000 ppm 500 ppm 300 ppm 100 ppm 50 ppm 10 ppm O3 CL2 H2S SO2 NO2 NO
Infrarot-Modul NDIR Ultraviolett-Modul NDUV Ultraviolett-Modul NDUV / UVRAS
* Kalibrierung mit Propan
(1) Full Scale (FS)
Other ranges on request
Table of Detection Limits (= 3 σ) in Percent of Full Scale
Nachweisgrenzen / % vom Messbereichs-Endwert (F.S.) 100 Vol.% 50 Vol.% 30 Vol.% 20 Vol.% 10 Vol.% 5 Vol.% 1 Vol.% 5.000 ppm 2.000 ppm 1.000 ppm 500 ppm 300 ppm 100 ppm 50 ppm 10 ppm O3 < 0,1% < 0,1% < 0,1% < 0,2% < 0,5% < 0,5% < 0,5% CL2 < 0,1% < 0,1% < 0,1% < 0,1% < 0,1% < 0,1% < 0,1% < 0,2% < 0,5% H2S < 0,1% < 0,1% < 0,1% < 0,1% < 0,2% < 0,5% SO2 < 0,1% < 0,1% < 0,1% < 0,1% < 0,1% < 0,1% < 0,1% < 0,1% < 0,5% < 0,5% < 0,5% NO2 < 0,1% < 0,1% < 0,1% < 0,2% < 0,2% < 0,5% < 0,5% < 0,5% NO < 0,1% < 0,1% < 0,1% < 0,2% < 0,2%
Infrarot-Modul NDIR Ultraviolett-Modul NDUV Ultraviolett-Modul NDUV / UVRAS
* Kalibrierung mit Propan
Definition der Nachweisgrenze
Die Nachweisgrenze ist der kleinste Messwert, der mit einer bestimmten Unsicherheit ermittelt werden kann. Diese Unsicherheit beinhaltet die Auflösung, das Rauschen und die Stabilität des Gassensors für ein bestimmtes Gas und einen bestimmten Messbereich. Zur Ermittlung der Nachweisgrenze werden mehrere Einzelmessungen unter identischen Messbedingungen durchgeführt. Mit den erhaltenen Werten der Einzelmessungen wird die Standardabweichung "Sigma" (σ) berechnet. Die in der Tabelle angegebenen Werte entsprechen dem dreifachen Betrag von Sigma.
1) Zero to Full Scale (FS)
Recalibrations
The following recalibration intervals are recommended for UV sensors:
Optionen (installed inside of the sensor casing)
8.1. Sauerstoffsensor
Der Sauerstoffsensor ist ein optional erhältliches Sensormodul zu einem RITTER MultiGas NDIR- oder NDUV-Sensor. Die gemessene Sauerstoffkonzentration wird in der mitgelieferten Software angezeigt. Es stehen zwei Versionen zur Verfügung:
a) Spezifikationen für nicht aggressive Gase
| Messverfahren: | Elektrochemischer Sensor |
| Messbereiche (Standard Version): | 0 – 25% or 0 – 100% |
| Messgenauigkeit: | ±2% der Spanne (Vollausschlag) |
| Auflösung: | < 0.5% der Spanne (Vollausschlag) |
| Ansprechzeit (t90): | ≈ 15 s; automotive Version ≈ 5 s |
| Lebensdauer: | ca. 5 Jahre |
b) Spezifikationen für H2S und ähnliche saure Gase
| Messverfahren: | Elektrochemischer Sensor |
| Messbereiche (H2S resistente Ausführung): | 0.5 – 35% |
| Messgenauigkeit: | ±2% der Spanne (Vollausschlag) |
| Auflösung: | < 0.5% der Spanne (Vollausschlag) |
| Ansprechzeit (t90): | ≈ 15 s; automotive Version ≈ 5 s |
| Lebensdauer: | ca. 5 Jahre |
8.2. Drucksensor
Eine Veränderung des Gasdrucks beeinflusst die Anzahl von Molekülen pro Volumen und führt damit zu einer Änderung der Gasdichte. Diese Dichteänderung hat wiederum einen wesentlichen Einfluss auf das Ergebnis der Konzentrationsmessung durch den Sensor. Durch die Messung des Gasdrucks im Inneren der Messzelle (Küvette) wird der Messwert der Konzentrationsmessung kompensiert / korrigiert.
Der Drucksensor ist als Sensormodul optional zu den »RITTER MultiGas« NDIR- oder NDUV-Sensoren erhältlich. Die gemessenen Druckwerte werden in der mitgelieferten Software angezeigt. Folgende Ausführungen sind verfügbar:
a) Spezifikationen für nicht aggressive Gase
| Messbereich: | 800 – 1,200 mbar abs. |
| Messgenauigkeit: | ±1% der Spanne (Vollausschlag) |
| Auflösung: | <1 mbar |
| Ansprechzeit (t90): | 1 s |
| Inkl. Temperatur-Kompensation |
b) Spezifikationen für H2S und ähnliche saure Gase
| Messbereich: | 0.2 – 3.5 bar abs. |
| Messgenauigkeit: | ±1% der Spanne (Vollausschlag) |
| Auflösung: | 2 mbar |
| Ansprechzeit (t90): | 1 s |
| Inkl. Temperatur-Kompensation |
8.3. Feuchtesensor
Der Feuchtesensor ist optional als zusätzliches Sensormodul zu einem »RITTER MultiGas« NDIR- oder NDUV-Sensor erhältlich. Die gemessenen Feuchtigkeitswerte (absolut und relativ) werden durch die mitgelieferte Software angezeigt.
Spezifikationen
| Messverfahren: | Polymer-Feuchtesensor |
| Messbereich: | 0-100% rH |
| Messgenauigkeit: | ±2% rH der Spanne (Vollausschlag) |
| Auflösung: | ±1% RH |
| Ansprechzeit (t90): | 12 s |
| Inkl. Temperatur-Kompensation | |
| Angezeigte Werte (Software): | absolut (% absH) und relative Feuchte (% rH) |
8.4. Analoger Spannungsausgang
Für den Anschluss an ein analoges Datenerfassungsgerät stellt der analoge Spannungsausgang alternativ folgende Spannungspegel zur Verfügung:
Der Spannungsbereich ist nach Kundenwunsch voreingestellt und kann vom Anwender nicht verändert werden.
Das analoge Spannungsausgangs-Modul ermöglicht die gleichzeitige Ausgabe von bis zu 4 verschiedenen Messwerten auf 4 separaten Kanälen:
Bitte beachten: Bitte beachten Sie die Zuordnung der jeweiligen Gaskonzentrations-Messungen zu den jeweiligen Kanälen. Diese ist im Kalibrierprotokoll des Sensormoduls angegeben
Zuordnung der Kontakte von Buchse und Stecker des Analogen Spannungsausgangs zu den Kanälen:
| Kontakt Nr. | Zuordnung zu Kanal | Aderfarben des Verbindungs-Kabel |
|---|---|---|
| 1 | Kanal 1 | weiß |
| 2 | Kanal 2 | grün |
| 3 | Kanal 3 | gelb |
| 4 | Kanal 4 | grau |
| 5 | Masse | braun |
Das Anschluss-Kabel wird mit offenen Enden zum Anschluss an das analoge Datenerfassungsgerät des Anwenders geliefert
8.5. Heizung und Thermostatisierung des Sensorgehäuses
Um die Kondensation von feuchtem Gas im Inneren des Sensors zu vermeiden, kann das Sensorgehäuse beheizt und thermostatisiert werden. Standardmäßig ist der Temperaturregler auf 55°C voreingestellt; niedrigere Temperaturen sind auf Anfrage möglich.
Das Heizelement und der Temperaturregler sind an der Halterung der Messküvette angebracht.
Spezifikationen
| Temperaturregler | 30-50°C |
| Regelgenauigkeit | ± 0,2 K |
| Heizleistung | 12 Watt / 30 Watt mit externem Heizelement |