MultiGas Ultraviolet Module NDUV / UVRAS

Overview

For the detection of NO an EDL (electrodeless gas discharge lamp) is used. In the EDL, N₂ and O₂ are converted to NO and produce selective UV radiation. With this radiation a cross sensitivity free NO measurement is made possible. This method is called UV resonance spectroscopy (UVRAS).

Recalibration

• Readjustment of the zero-point is recommended once a week.
• Contamination of the measuring cuvette can lead to shifting of the end-point. Due to the integrated filter, re-adjustment of the end-point is generally not required – but can be performed once a year.
• Additionally, cartridges filled with an inert and the respective test gas for recalibration of the zero and end-point can be provided.
• Long-term drift is < 1% of Full Scale (F.S.) / 24 h.

Additional sensors / Sensor options

• Data sheet
• MultiGasMultiGas

Oxygen Sensor

• Electrochemical sensor
• Measuring ranges:
  • Standard version 0 – 25 % or 0 – 100 %
  • H₂S resistant version 0.5 – 35 %
• Measurement accuracy ±2 % of span (full scale)
• Resolution: < 0.5 % of span (full scale)
• Response time (t₉₀): 5 - 10 s; automotive version < 3.5 s
• Lifetime: approx. 5 years

Read MoreOxygen Sensor

• Data sheet, Data sheet
• MultiGasMultiGas

Pressure Sensor

• Pressure compensation of measured gas concentrations
• Measuring ranges:
  • Standard version 800 - 1,200 mbar abs.
  • H₂S resistant version 0.2 – 3.5 bar abs.
• Measurement accuracy ±1% of span (full scale)
• Resolution: <1 mbar (2 mbar for H₂S resistant version)
• Response time (t₉₀): 1 s
• Incl. temperature compensation

Read MorePressure Sensor

• Data sheet
• MultiGasMultiGas

Humidity sensor

• Polymer humidity sensor
• Measuring range: 0-100% rH
• Measurement accuracy ±2% rH of span (full scale)
• Resolution: ±1% rH
• Response time (t₉₀): 12 s
• Incl. temperature compensation
• Indicated values: absolute [% absH] and relative humidity [% rH]

Read MoreHumidity sensor

• Data sheet
• Sensors
• MultiGas

Analog Voltage Output

• Allows the output of gas concentration values for up to 4 different gases at 4 separate channels
• 4 parallel signal outputs
• 3 x gas concentration signals including oxygen sensor
• 1 x value from humidity sensor
• Resolution: 16 bit
• Update rate: 1 sec

Read MoreAnalog Voltage Output

• Data sheet
• MultiGas

Case Heating

• Prevents condensation of humid gas inside of the sensor
• Temperature controller: 30 - 50 °C
• Control accuracy: ± 0.2 K
• Heating power: 12 Watt

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