VisiPro™ DO Ex First optical DO sensor with ATEX approval

Definition of VisiPro DO Ex Sensor The VisiPro DO is the only optical dissolved oxygen (DO) sensor for use in explosive environment. Benefits Reliable and robust optical measurement Easy installation Wireless connection mobile devices with Ex approval Zone 0 Laboratory calibration possible with HDM and mobile devices Simplifies maintenance Flow independence and rapid start – up with no polarization. Direct analog or digital HART communication to the process control system via 4-20 mA signal with integrated transmitter. Features ATEX / IEcEx certification for Zone 0 Sensor and mobile device Optical DO 2-wire 4-20mA connection HART 7.0 Bluetooth 4.0

IECEx / BVS 13 ATEX Conformity VisiPro DO Ex is the only optical sensor for use in explosive atmosphere.

IECEx / BVS 13 ATEX Conformity View Device Mobile for use in explosive atmosphere.

Fluorescence Quenching by Oxygen 1 Fluorescence process (without oxygen) Light Fluorescence Luminophore Light Absorption Excited State 2 Quenching in the presence of oxygen The measurement principle is based on the effect of dynamic luminescence quenching by molecular oxygen.  Oxygen dependent luminescence The following scheme explains the principle of dynamic luminescence quenching by oxygen. (1) Luminescence process in absence of oxygen The luminophore (special molecule) absorbs photons and release a part of the absorbed energy by emission of photons with a longer wavelength (lower energy) (2) Deactivation of the luminescent indicator molecule by molecular oxygen The collision between the luminophore in its excited state and the quencher (oxygen) results in radiationless deactivation and is called collisional or dynamic quenching. After collision, energy transfer takes place from the excited indicator molecule to oxygen which consequently is transferred from its ground state to its excited state. As a result, the indicator molecule does not emit luminescence and the measurable luminescence signal decreases. no fluorescence Energy transfer O2 O2 O2 Light Absorption Excited State

Optical DO Sensor: Measuring principle Phase shift in relation to oxygen concentration Oxygen free Oxygen level in air This graph illustrates the phase shift in relation to oxygen concentration. In oxygen free atmosphere (like N2) the phase shift is highest. Close to the air saturation the phase shift is smallest.

Design of Optical Sensor Blue LED Photodiode Red filter How is this optical theory designed in the VisiFerm sensors. The VisiFerm DO monitors the status of the sensors blue LED light using a photodiode. The photodiode with red filter measures the oxygen dependent red light generated on the luminophore through fluorescensce caused after exitation by the blue light. O2 molecules diffuse through an isolation layer toward the luminophore. When the luminophore comes into contact with elemental oxygen the O2 molecules absorb energy. The carrier layer needs to have good optical properties: transparency, less absorption, less luminescence. The isolation layer is in direct contact with the measuring fluid and therefore it needs a good permeability to oxygen. Notice that VisiFerm DO sensors measure the partial pressure of oxygen just like classical sensors. With VisiFerm there is only one consumable part, the sensor cap. It includes a membrane with the luminophore. Just one single replaceable spare part in robust design. Carrier layer Luminophore Isolation layer

No Transmitter With the µ-transmitter integrated, VisiPro sensor offer fully compensated signal directly to the process control system. Fully compensated signal Temperature compensated E.g. Pressure, Salinity Direct connection to the PCS via Digital HART 4-20mA analog Integrated µ-transmitter stores Last calibration data Diagnostic information Sensor configuration

VisiPro DO Ex Installation in Ex Environment The VisiPro DO Ex is intended for the measurement of dissolved oxygen (DO) in explosive atmosphere. Typical application include biotechnology, chemical pharmaceutical application and chemical industry. Measuring Loop in Hazardous Environment

Easy 2-wire Installation The VisiPro DO sensor is fitted with a M12 male, A coded connector. The four golden contacts are denoted as pin 1 to pin 4. For easy identification of each pin the M12 has a mark between pin 1 and pin 2.

Typical Connection to HART Interface VisiPro DO sensor supports the platform-independent HART 7.0 communication protocol. If no resistor in the HART interface card is integrated, an external 250 Ω resistor has to be installed in series between the sensor and the process control system as described on Figure 10 B.

Typical Connection to Analog 4-20 mA Interface The 4–20 mA interface enables direct connection of the VisiPro DO sensor to a data recorder, indicator, control unit or PCS with analog I/O. The VisiPro DO works as a current sink sensor and is passive.

Laboratory Calibration The VisiPro DO Ex allow simple calibration and maintenance in the Lab. Offline Calibration and Configuration in the Lab Simplify calibration and maintenance Robust industrial design Sensor Cap easily replaceable Full online wireless option for easy monitoring, configuration and calibration with mobile devices and HDM Sensor status and self-diagnostic information

Simple Maintenance With only one spare parts the VisiPro Do Ex sensors are very robust and easy to maintain. No electrolyte Quality indicator specifies when oDO cap needs to be replaced Cap replacement is very simple and rapid. No polarization time required.

Calibration of Optical Sensors Single point (air) calibration is sufficient for most processes. Measure ambient pressure Put sensor over stirred water to account for humidity (room temperature) Calculate pO2 Current I (nA) A zero point calibration is only advisable if very high accuracy is required at low oxygen concentrations. Electrochemical and optical DO sensors are calibrated with air. Periodically the zero point of DO sensors is checked with nitrogen gas. However, please note that a zero point calibration is only advisable if very high accuracy is required at low oxygen concentrations. Calibration with air-saturated water is less accurate due to the slow saturation process of air in water. Zero point check with a sulfite solution containing no oxygen is also less accurate and needs poisonous material. Electrochemical and optical DO sensors measure directly the partial pressure of oxygen pO2 in mbar. Calibration with air: The electrochemical DO sensor must be connected to the Transmitter for a certain time to stabilize the current. This time depends on the type of sensor  please check the manual. The optical DO sensor is ready to use. Wait until the signal is constant and store the signal. Check with nitrogen: General rule for recalibration: Begin with frequent tests. If the sensor parameters are stable, expand the period of recalibration. 50 100 150 200   15

Several ODO Caps for your Application ODO Cap H0 ODO Cap H1

Order Information for VisiPro DO Ex Delivery Condition: How to order VisiPro DO Ex sensor? ODO Cap H0 / H1 VisiPro DO Ex P/N: 243400 P/N: 243401 P/N: 243402 P/N: 243403 P/N: 243500 P/N: 243515 Note: The VisiPro DO Ex sensors are delivered without ODO Cap. They have been calibrated with a reference cap during final inspection at Hamilton.

Ordering Information P/N Description 243400 VisiPro DO Ex 120 without Cap 243401 VisiPro DO Ex 225 without Cap 243402 VisiPro DO Ex 325 without Cap 243403 VisiPro DO Ex 425 without Cap 243500 ODO Cap H1 243515 ODO Cap H0 355283 Sensor Cable M12 3m 355284 Sensor Cable M12 5m 355285 Sensor Cable M12 10m 355288 Sensor Power Cable M12 243499 Wireless Converter BT 243688 View Ex Mobile ( Ex Zone 0)

Definition of VisiPro DO Ex Sensor The VisiPro DO is the only optical dissolved oxygen (DO) sensor for use in explosive environment. Benefits Reliable and robust optical measurement Easy installation Wireless connection mobile devices with Ex approval Zone 0 Laboratory calibration possible with HDM and mobile devices Simplifies maintenance Flow independence and rapid start – up with no polarization. Direct analog or digital HART communication to the process control system via 4-20 mA signal with integrated transmitter Wireless connection to mobile device with Ex approval Features ATEX / IEcEx certification for Zone 0 Optical DO 2-wire 4-20mA connection HART 7.0 Bluetooth 4.0

Technical Data Key Specification ATEX Approval Yes, EX II 1G Ex ia IIC T6/T5/T4/T3 Ga 4-20 mA current range: 3.5 to 22 mA 4-20 mA accuracy: <0.3% current value +0.05 mA Analog Interface Two wire sink needs to be powered by external power supply Sensor Accuracy at 25 °C 1 ± 0.05 %-vol: 21± 0.2 %-vol; 50 ± 0.5 %-vol Operation Voltage: 18 to 30 VDC Operating Temperature: -10 to 140 °C; the Sensor provides no DO reading above 85 °C Autoclavable No Steam Sterilizable Yes, max. temperature 140°C Tightness: IP 68 Wireless Interface Bluetooth 4.0

Further Information Operation Instructions VisiPro DO DE,FR,EN, IT VisiPro DO Ex Flyer DE, FR,EN, IT Quick Guide Wireless Converter BT DE,FR,EN, IT Quick Guide View Ex Mobile DE,FR,EN,IT Leaflet Sensor Cable M12 DE,FR,EN,IT Leaflet Sensor Power Cable M12 DE,FR,EN,IT ATEX, IECEx Certificates Specification Sheet End customer presentation Visit our Intercompany Cloud or Website for downloading the marketing materials: http://www.hamiltoncompany.com/item/view/c/1322/p/3952/

Thank you for your attention! Hamilton Company, Reno / USA Hamilton Bonaduz AG, Switzerland

Fluorescence In optical sensors fluorescence is applied to get an information of light. Fluorescence is the emission of light by a substance that has absorbed light or other electromagnetic radiation. It is a type of luminescence. The emitted light has a longer wave length (smaller energy) than the absorbed light. Fluorescence is the emission of light by a substance that has absorbed light or other electromagnetic radiation. It is a type of luminescence. The emitted light has a longer wave length (smaller energy) than the absorbed light.

Optical DO Sensor: Measuring principle The phase shift between the incident blue light and the fluorescent red light is dependent on pO2. Relative fluorescence intensity F 100% F0 Excitation profile Emission profile without O2 Emission profile with O2 The blue excitation LED is sinusoidally modulated. The measured parameter of interest is the phase shift (essentially a time delay) between the exciting blue LED signal and the detected red emission from the luminophor. The phase delay is inversely related to the amount of dissolved oxygen near the luminophor, typically oxygen in the water of interest. The smaller the phase shift the smaller the about of oxygen. This phase-modulation technique is used to measure the lifetime of the oxygen-dependent quenching of luminescence. Much has been published on optical oxygen sensors which are based on intensity quenching of the fluorescence. It has now been established that these sensors have many drawbacks. These include susceptibility to light source and detector drift, to changes in optical path, and drift due to degradation or leaching of the dye. These effects can be minimised by operating the sensor in the time domain instead of the intensity domain. The lifetime, t, is an intrinsic property of the fluorophore which, unlike intensity, is virtually independent of external perturbations. Time (ms)