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NITROUS OXIDE SENSOR USER MANUAL

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Содержание N2O-50

Страница 1: ...NITROUS OXIDE SENSOR USER MANUAL...

Страница 2: ...NITROUS OXIDE SENSOR MANUAL Copyright 2024 Unisense A S Version January 2024...

Страница 3: ...NITROUS OXIDE SENSOR MANUAL UNISENSE A S...

Страница 4: ...ion procedure 10 Polarization procedure 10 CALIBRATION PRINCIPLES 11 CALIBRATION 11 ALTERNATIVE CALIBRATION 12 Zero calibration point 12 Known concentration calibartion point 12 Approval of new sensor...

Страница 5: ...event will Unisense A S be liable for any direct indirect consequential or incidental damages including lost profits or for any claim by any third party arising out of the use the results of use or t...

Страница 6: ...g day E mail sales unisense com Unisense A S Langdyssen 5 DK 8200 Aarhus N Denmark Tel 45 8944 9500 Fax 45 8944 9549 Further documentation and support is available at our website www unisense com CONG...

Страница 7: ...N2O R SR N2O R IR N2O R HR N2O MR N2O NP N2O FT N2O SL N2O ST N2O PEEK Tip diameter 40 60 m 90 110 m 400 600 m 400 600 m with cap 400 600 m with cap 400 600 m with cap 400 600 m with cap 500 m for Mic...

Страница 8: ...nitrous oxide from the environment will penetrate through the sensor tip membrane and be reduced at the metal cathode surface The picoammeter converts the resulting reduction current to a signal The i...

Страница 9: ...e sensor to work This is done by applying a voltage of 1 3 V for 30 minutes prior to the period of polarization which is required for most electrochemical sensors Stabilization period The electrolyte...

Страница 10: ...e adaptor cable not the yellow banana plug and turn the polarization voltage to 1 3 V Leave the polarization at 1 3 V for approx 30 min You will see a very high signal in the beginning but this will d...

Страница 11: ...s can thus be linearly converted to partial pressure Check and repeat calibration at appropriate intervals Shortly after taking a sensor into use the appropriate interval may be 2 hours when the senso...

Страница 12: ...amage to the sensor see Table 1 for the measuring range for your sensor A defined nitrous oxide concentration can be obtained by two different procedures a Use a gas mixture controller to obtain a def...

Страница 13: ...ents ambient air from entering the vessel We recommend the Unisense Calibration chamber CAL300 and rubber stoppers for calibrations b Add a defined volume of nitrous oxide saturated water to a defined...

Страница 14: ...cal noise to the signal The nitrous oxide in the water will slowly escape to the atmosphere and the concentration can only be considered constant for a few minutes concentration can only be considered...

Страница 15: ...s environment Therefore when working with glass tip microsensors we recommend that measurements are performed only in a stable set up free of moving or vibrating devices We recommend the Unisense labo...

Страница 16: ...hould be avoided as it can affect the sensitivity of the nitrous oxide microsensor Nitric Oxide NO is interfering the N2O sensor signal CO2 in mM concentrations may affect the zero signal of the senso...

Страница 17: ...ons at an additional cost Unisense provides several options for customizations and adaptions e g tip size response time pressure tolerance and stirring sensitivity making accurate measurements possibl...

Страница 18: ...approx 4 C which may give a longer lifetime If the sensor is used regularly it can be stored polarized CLEANING THE SENSOR Depending on which substance is present on the sensor tip or membrane the sen...

Страница 19: ...gh nitrous oxide production from thawing permafrost Nature geoscience 3 332 335 Abstract Horn M A Schramm and H L Drake 2003 The earthworm gut an ideal habitat for ingested N2O producing microorganism...

Страница 20: ...h 96 ethanol rinse with 0 01M HCl and rinse with water Problem An unstable signal or the signal fluctates if the setup is touched or equipmen is introduced in the medium you are measuring in Possible...

Страница 21: ...vacuum treatment Immerse the sensor tip for 20 min in the degassed water Repeated or prolonged treatment may be necessary Problem The signal is very low Possible cause Contamination of the cathode su...

Страница 22: ...giving the solubility of N2O at a given combination of temperature and salinity Tools N2O Calculator or the N2O table button in the calibration dialog O C 0 5 10 16 22 26 30 36 40 0 59 35 48 46 40 16...

Страница 23: ...www unisense com sales unisense com...

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