The OnlineNH3 contains a selective amperometric sensor with gas selective membranes, membrane pumps for gas transportation and sample transfer and an integrated PC for continuous recording of measurement data, trends and alarm states. The measurement values can be transmitted via digital (alarm-) and analog outputs into the control room.

Due to an integrated cleaning system the gas analysis in O2 free gases (e. g. biogas) is realized without any drift effects. Because of the stress free mode of operation, the sensor lifetime is considerable increased.

The operation principle makes the OnlineNH3 ideal as a basis for NH3 adjusted regulation of enrichment and cleaning steps.

The instrument is available in the same design for monitoring of hydrogen sulphide (H2S), sulfur dioxide (SO2) or ozone (O3).

Applications

• As basis for NH3 adjusted regulations (e. g. monitoring of air quality in livestock buildings)
• Environment analysis

Fields of applications:

• Industrial sectors
• Animal husbandry
• Biogas plants

Advantages

• Continuous NH3 determination in gases (measurement duration < 5 min)
• Robust method of analysis
• Automatic sample dosing
• Easy calibration steps
• Selective electrochemical sensor with no cross-sensitivity
• Software easy-to-use
• Output value of NH3 as a 4 - 20 mA signal for integration into the local control system
• Long lifetime of the sensors due to the intermittent gas switching
• Integrated rinsing steps for measuring of continually fresh samples
• Active sample intake of the gas up to a distance of 100 m – variable setup of device (wall mounted)
• Also available for determination of hydrogen sulphide (H2S), sulphur dioxide (SO2) or ozone (O3)