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Opacimeter

SENTRY. Opacimeter. SENTRY Opacimeter Electro-optic sensor used to measure opacity through suspension dust, gas emissions, smoke, rain, snow, fog, dust and haze.

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Opacimeter

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  1. SENTRY Opacimeter DURAN ELECTRONICA. Tomás Bretón 50, 28045 Madrid, Spain marketing@duranelectronica.com www.duranelectronica.com I-OPACIMETROSENTRY2009

  2. SENTRY Opacimeter Electro-optic sensor used to measure opacity through suspension dust, gas emissions, smoke, rain, snow, fog, dust and haze. Its integrated one-piece housing design keeps all cabling internal to the sensor, so that it is fully protected against hard weather conditions. View of the lens SENTRY opacimeter has been designed to work in all weather conditions. 1 DURAN ELECTRONICA. Tomás Bretón 50, 28045 Madrid, Spain marketing@duranelectronica.com www.duranelectronica.com I-OPACIMETROSENTRY2008

  3. Principle of functioning SENTRY opacimeter uses the principle of forward scattering. The infrared light projected from the transmitter (TX) intersects the field of view of the receiver (RX) with a forward angle of 42º. The area of intersection is known as the sample volume. This 42º forward angle ensures performance over a wide range of particle sizes, including smoke, dust, haze, fog, rain and snow. The sensor uses ”look down” geometry to reduce window contamination and clogging from blowing snow. 2 DURAN ELECTRONICA. Tomás Bretón 50, 28045 Madrid, Spain marketing@duranelectronica.com www.duranelectronica.com I-OPACIMETROSENTRY2008

  4. Elements of the installation SENTRY opacimeter can be installed attached to an existing structure or as a stand-alone installation. Its major components, mounted to a cross arm, are the following: • TX head & RX head : consists of waterproof enclosures which holds the electrical and optical assemblies and a hood to protect the optics from direct sunlight and precipitation. • The Main Electronics Enclosure is also a waterproof cabinet with hinged door for easy access. The mounting flange is attached at the bottom of the main enclosure for attaching the mounting pipe (40mm section). The latter will fix the opacimeter to the floor. 3 DURAN ELECTRONICA. Tomás Bretón 50, 28045 Madrid, Spain marketing@duranelectronica.com www.duranelectronica.com I-OPACIMETROSENTRY2008

  5. Advantages ●Sentry does not need to be calibrated at installation like other opacimeters. ● It is not sensitive to external vibrations. ● It uses forward scattering technology (not back scattering*). *Back scattering technology implies that light is taken in a backward direction towards a receiver. It is not the most effective method, due that it relays on the weaker energy scattered backwards. Forward measuring, used by SENTRY, is considered to be the most accurate solution, as it measures light in a forward 42º angle, which makes the result to be more precise. 4 DURAN ELECTRONICA. Tomás Bretón 50, 28045 Madrid, Spain marketing@duranelectronica.com www.duranelectronica.com I-OPACIMETROSENTRY2008

  6. Installation 1No professional staff required: “plug & play” 2Use a sturdy pole or pedestal to reduce vibration. 3Locate the sensor in an area that is representative of the surrounding area you wish to monitor. 4Do not locate the sensor near light, smoke, fog or mist sources, unless you are trying to measure the reduction of visibility from these sources. 4The area within 5-6 meters of the sensor should be free of all vegetation and well drained. 5Mount the sensor so that the optics are 2.5 - 3meters high above ground level. SENTRY opacimeter is initially calibrated at factory: However, it is recommended that the calibration is checked during field installation, and every 6 months afterwards. “Just one person” & without specific tools SENTRY opacimeter is easily installed 5 DURAN ELECTRONICA. Tomás Bretón 50, 28045 Madrid, Spain marketing@duranelectronica.com www.duranelectronica.com I-OPACIMETROSENTRY2008

  7. Applications: TUNNELS Ventilation systems Using SENTRY opacimeter allows ventilation systems to be optimized while reducing energy usage. 6 DURAN ELECTRONICA. Tomás Bretón 50, 28045 Madrid, Spain marketing@duranelectronica.com www.duranelectronica.com I-OPACIMETROSENTRY2008

  8. Technical Characteristics Outputs available: 4-20mA current loop (isolated) Control relay with user selectable visibility threshold Power: From 100V to 240V AC Analog voltage 0-5V DC or 0-10V DC Accuracy: +/-1% RMSE Working temperature -40ºC a 60ºC Spectral sensitivity: 880 nm, Infrared Protection grade IP66, NEMA-4X Surge & EMI protection on all power & signal leads 8 DURAN ELECTRONICA. Tomás Bretón 50, 28045 Madrid, Spain marketing@duranelectronica.com www.duranelectronica.com I-OPACIMETROSENTRY2009

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