Electrolytic Cell

SO-B0-001 Limiting Current Type Zirconia Oxygen Sensor Operational Principle When voltage is applied to a zirconia electrolyte cell, oxygen is pumped through the zirconia disc from the cathode side to the anode side because the carriers of the current flowing through the zirconia electrolyte are oxygen ions. By attaching a cap with a pinhole on the cathode side of the cell and by increasing the voltage over the cell the current shows saturation due to the rate limiting step in the transfer of oxygen to the cathode. This saturation current is called limiting current and is nearly proportional to the ambient oxygen concentration. Below the advantages of the Zirconia Oxygen Sensor SO-B0-001: * Measuring range 10 ppm to 1000ppm oxygen * High accuracy * For many types a more or less linear characteristic * Small temperature dependence of the sensor signal * Low interference with other gases * Long service life * In many cases "Single point calibration" necessary only once SO-B0-001 Limiting Current Type Zirconia Oxygen Sensor Applications: * Medical * Laboratory * Food industry * Household/Gastronomy * Measuring technique * Security technology/Monitoring * (Electrical-) industry SO-B0-001 Limiting Current Type Zirconia Oxygen Sensor Characteristic Data: * TO8 Housing * Measuring gas: Oxygen concentration * Measuring medium: Gaseous atmosphere * Measuring principle: Limiting current type sensor * Measuring ranges: 10 ppm - 1000 ppm O2 * Output current: 70 A - 140 A * Accuracy: ±20 ppm O2 * Reproducibility:

SO2-AE Sulfur Dioxide Sensor SO2 Sensor Description Alphasense Sulfur Dioxide gas sensors operate using proven fuel cell technology. SO2-AE Sulfur Dioxide Sensor sizes: 20mm diameter, the industry standard size for portable gas detectors The SO2 range provides OEMs with reliable sensors for use in a variety of applications. Strong signal levels combined with low zero current allows resolution below 1ppm and an operating range for safety applications up to 2,000ppm. The sensors are designed for use in both fixed site and portable instrumentation. The SO2 sensors offer our electrolyte leak-free guarantee and reliable long-term detection performance. The leakproof housing is moulded with a colour coded top for ease of identification. SO2-AE Sulfur Dioxide Sensor SO2 Sensor Specifications * Range: 2,000ppm limit of performance warranty * Sensitivity: 55 to 80nA/ppm in 400ppm SO2 * Response time t90: < 30s from zero to 400ppm SO2 * Resolution: < 1.5 RMS noise (ppm equivalent) * Temperature range: -30 to 50'C * Pressure range: 80 to 120 kPa * Humidity range:15 to 90 % rh continuous * Weight: < 6 g

CL2-A1 Chlorine Sensor (CL2 Sensor) Description Alphasense Chlorine gas sensors operate using proven fuel cell technology. CL2-A1 Chlorine Sensor size: 20mm diameter, the industry standard size for portable gas detectors The Cl2 range provides OEMs with reliable sensors for use in a number of high volume applications. Strong signal levels combined with low zero current allows resolution to 20ppb and an operating range from +0 to 20ppm. The sensors are suitable for inclusion in fixed installation sensing heads and portable safety instruments. These sensors have improved transient response to humidity changes compared to competitors' equivalent sensors. The Cl2 sensors offer our electrolyte leak-free guarantee and reliable long-term detection performance. The leakproof housing is moulded with a colour coded top for ease of identification. CL2-A1 Chlorine Sensor (CL2 Sensor) Specifications * Range: 20 ppm limit of performance warranty * Sensitivity: -350 to -750 nA/ppm in 10ppm Cl2 * Response time t90: < 60s from zero to 10ppm Cl2 * Resolution: < 0.02 RMS noise * Operating life: > 24 months * Temperature range: -20 to 50'C * Pressure range: 80 to 120 kPa * Humidity range: 15 to 90 %rh continuous * Weight: < 6 g

NH3 3E 100 Ammonia Sensor (NH3 Sensor) FEATURES * Amperometric 3 electrode sensor cell * Fixed organic gel electrolyte * No CO2 interference * 0 volt bias operation NH3 3E 100 Ammonia Sensor (NH3 Sensor) TYPICAL APPLICATIONS * TLV-monitoring, leakage detection * Fixed point applications in cold storages & refrigeration plants only * For other applications please use NH3 3E SE versions * No background concentrations of ammonia & alcohols NH3 3E 100 Ammonia Sensor (NH3 Sensor) TECHNICAL SPECIFICATIONS * Measuring Range: 0-100 ppm * Sensitivity Range: 90 nA/ppm ± 40 nA/ppm * Zero Current at 20 deg C: < ± 150 nA * Resolution at 20 deg C: < 2 ppm * Bias Potential: 0 mV * Linearity:

Electrochemical Sensing Module Chlorine (HOCl, HOBr or ClO2 ) & Temperature KAPTA 2000-AC2 In-line Chlorine Sensors General description The KAPTA 2000-AC2 probe has been specifically developed to measure free chlorine (HOCl) and temperature directly within a pressurised pipe for many applications including management and control of a drinking water network, real-time, rapid control of chemical dosing for industrial water processes and cleaning regimes and management of chlorine levels within swimming pools and spas. The KAPTA 2000-AC2 is an amperometric sensor using a structured photo-polymerised membrane directly on the electrode which suppresses the well-known drawbacks of amperometric sensors with electrolyte, such as pressure and flow sensitivity, and enables the probe to be installed directly within pipes up to 10 bar flow pressure without flow or pressure control. The sensor principal also eliminates the need for field re-calibration and on-going routine membrane replacement allowing both long-term stability of the signal and reduced maintenance costs. The principal of the measurement is based on a Clark-type cell with a working, counter and reference electrode. The sensor design includes a simple replaceable head which is easy to handle and requires no reagent or electrolyte. As the lifetime of the sensor can vary with the application, this design allows more flexibility and price improvement for critical applications. KAPTA 2000-AC2 In-line Chlorine Sensors Benefits * Real-time water network monitoring * No on-going membrane / electrolyte maintenance * Chemical free operation KAPTA 2000-AC2 In-line Chlorine Sensors Main features * Amperometric sensor * Measurement of the main disinfection species: HOCl, HOBr or ClO2 * User replaceable sensing head * Inline monitoring at up to 10 bar pressure * Easy conditioning * > 1 year shelf life KAPTA 2000-AC2 In-line Chlorine Sensors Typical applications * Water quality control * Drinking water security * Industrial process control * Chemical dosing measurement and control * RO membrane security * Swimming pool water quality * Cooling towers * Fish farming

NO-B1 Nitric Oxide Sensor (NO Sensor) Description Alphasense Nitric Oxide gas sensors operate using proven fuel cell technology. NO-B1 Nitric Oxide Sensor size: 32mm diameter package, the best choice for fixed site applications The NO range provides OEMs with reliable sensors for use in a number of high volume applications. Strong signal levels combined with low zero current allows resolution to 200 parts per billion (ppb) whilst giving linear outputs to as high as 250ppm. The sensors are suitable for inclusion in fixed installation sensing heads, portable safety instruments, urban air monitoring and stack gas analysers. Alphasense NO sensors provide a significant improvement in stability of response to transient relative humidity changes. The NO sensors offer our electrolyte leak-free guarantee and reliable long-term detection performance. The leakproof housing is moulded with a colour coded top for ease of identification. NO-B1 Nitric Oxide Sensor (NO Sensor) Specification * Range: 250ppm NO limit of performance warranty * Sensitivity: 400 to 620nA/ppm in 50ppm NO * Resolution: < 0.15 RMS noise (ppm equivalent) * Response time t90: < 30s from zero to 50ppm NO * Temperature range: -30 to 50 deg C * Pressure range: 80 to 120 kPa * Humidity range: 15 to 90 % rh continuous * Weight: < 13g

NO2-A1 Nitrogen Dioxide Sensor (NO2 Sensor) Description Alphasense Nitrogen Dioxide gas sensors operate using proven fuel cell technology. NO2-A1 Nitrogen Dioxide Sensor size: 20mm diameter, the industry standard size for portable gas detectors The NO2 range provides OEMs with reliable sensors for use in a number of high volume applications. Strong signal levels combined with low zero current allows resolution to 50 parts per billion (ppb) and an operating range to 20ppm. The sensors are suitable for use in fixed installation sensing heads, portable safety instruments, urban air monitoring and stack gas analysers. The NO2 sensors offer our electrolyte leak-free guarantee and reliable long-term detection performance. The leakproof housing is moulded with a colour coded top for ease of identification. NO2-A1 Nitrogen Dioxide Sensor (NO2 Sensor) Specifications * Range: 20 ppm NO2 limit of performance warranty * Sensitivity: -250 to -650 nA/ppm in 10ppm NO2 * Response time t90: < 50 (s) from zero to 10ppm NO2 * Resolution: < 0.02 RMS noise (ppm equivalent) * Temperature range : -20 to 50 deg C * Pressure range: 80 to 120 kPa * Humidity range: 15 to 90 % rh continuous * Weight: < 6 g

NO2-B43F Nitrogen Dioxide Sensor (NO2 Sensor) Description Alphasense Nitrogen Dioxide gas sensors operate using proven fuel cell technology. Sensors are available in the following sizes: 32mm diameter package, the best choice for fixed site applications The NO2 range provides OEMs with reliable sensors for use in a number of high volume applications. Strong signal levels combined with low zero current allows resolution to 50 parts per billion (ppb) and an operating range to 20ppm. The sensors are suitable for use in fixed installation sensing heads, portable safety instruments, urban air monitoring and stack gas analysers. The NO2 sensors offer our electrolyte leak-free guarantee and reliable long-term detection performance. The leakproof housing is moulded with a colour coded top for ease of identification. * Range: 20 ppm NO 2 limit of performance warranty * Sensitivity: -175 to -450 nA/ppm at 2ppm NO2 * Response time: < 60 t90 (s) from zero to 2ppm NO2 * Temperature range: -30 to 40'C * Pressure range: 80 to 120kPa * Humidity range: 15 to 85 % rh continuous * Weight: < 13 g

NO-AE Nitric Oxide Sensor (NO Sensor) Description Alphasense Nitric Oxide gas sensors operate using proven fuel cell technology. NO-AENitric Oxide Sensor size: 20mm diameter, the industry standard size for portable gas detectors The NO range provides OEMs with reliable sensors for use in a number of high volume applications. Strong signal levels combined with low zero current allows resolution to 200 parts per billion (ppb) whilst giving linear outputs to as high as 250ppm. The sensors are suitable for inclusion in fixed installation sensing heads, portable safety instruments, urban air monitoring and stack gas analysers. Alphasense NO sensors provide a significant improvement in stability of response to transient relative humidity changes. The NO sensors offer our electrolyte leak-free guarantee and reliable long-term detection performance. The leakproof housing is moulded with a colour coded top for ease of identification. NO-AE Nitric Oxide Sensor (NO Sensor) Specification * Range: 5,000ppm NO limit of performance warranty * Sensitivity: 40 to 80nA/ppm in 250ppm NO * Resolution: < 1 RMS noise (ppm equivalent) * Response time t90: < 75s from zero to 250ppm NO * Temperature range: -30 to +50'C * Pressure range: 80 to 120 kPa * Humidity range: 15 to 90 % rh continuous * Weight: < 6 g Matched Transmitter board for NO-AE NO Sensor 4-20mA Digital Transmitter Board * Factory calibration, custom-set for immediate use * Digital zero, sensitivity and temperature compensation * Digital and 4-20mA output * Biased or unbiased operation * Calibration and range change