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Flammable Gases and Vapors

Process Monitoring System

Sampling
  • Control Instruments Corp.:
    1. Heated Sampling System:
      To avoid condensation during sampling, the entire analyzer pneumatic assembly is heated to 60°C (140°F). This eliminates both inaccurate readings caused by solvent dropout as well as excessive maintenance time due to sample condensation and clogging.
      It is suitable for monitoring many common solvent vapors. The analyzer is unaffected by the temperature of the process and can sample streams above 1500°F.
      The assembly mounts directly onto the process ductwork, as close as possible to the sample pickup point. This eliminates external heated sample lines and allows the fastest response time. An optional modification allows the assembly to mount to the wall with side access to sample and exhaust ports (limited by application).
      The analyzer employs customer-supplied compressed air to drive its integrated air-aspirated sampling system. This method is simple, has no moving parts and requires very little maintenance. The sampling system does not require bottled air or sample pumps. Autocalibration solenoids, which allow remote activation of calibration tests, are standard
      SNR671 PrevEx® Flammability Analyzer
    2. Heated Sampling System:
      To avoid condensation during sampling, the entire analyzer pneumatic assembly is heated to 120°C (248°F). This eliminates both inaccurate readings caused by solvent dropout as well as excessive maintenance time due to sample condensation and clogging.
      It is suitable for monitoring many common solvent vapors. The analyzer is unaffected by the temperature of the process and can sample streams above 1500°F.
      The assembly mounts directly onto the process ductwork, as close as possible to the sample pickup point. This eliminates external heated sample lines and allows the fastest response time.
      The analyzer employs customer-supplied compressed air to drive its integrated air-aspirated sampling system. This method is simple, has no moving parts and requires very little maintenance. The sampling system does not require bottled air or sample pumps. Autocalibration solenoids, which allow remote activation of calibration tests, are standard
      SNR672 PrevEx® Flammability Analyzer
    3. Heated Sampling System:br> To avoid condensation during sampling, the entire analyzer pneumatic assembly is heated to 120°C (248°F). This eliminates both inaccurate readings caused by solvent dropout as well as excessive maintenance time due to sample condensation and clogging.
      It is suitable for monitoring many common solvent vapors. The analyzer is unaffected by the temperature of the process and can sample streams above 1500°F.
      The assembly mounts directly onto the process ductwork, as close as possible to the sample pickup point. This eliminates external heated sample lines and allows the fastest response time.
      The analyzer employs customer-supplied compressed air to drive its integrated air-aspirated sampling system. This method is simple, has no moving parts and requires very little maintenance. The sampling system does not require bottled air or sample pumps. Autocalibration solenoids, which allow remote activation of calibration tests, are standard
      SNR674 PrevEx® Flammability Analyzer
    4. Heated Sampling System:br> To avoid condensation during sampling, the entire analyzer pneumatic assembly is heated to 120°C (248°F). This eliminates both inaccurate readings caused by solvent dropout as well as excessive maintenance time due to sample condensation and clogging.
      It is suitable for monitoring many common solvent vapors. The analyzer is unaffected by the temperature of the process and can sample streams above 1500°F.
      The assembly mounts directly onto the process ductwork, as close as possible to the sample pickup point. This eliminates external heated sample lines and allows the fastest response time.
      The analyzer employs customer-supplied compressed air to drive its integrated air-aspirated sampling system. This method is simple, has no moving parts and requires very little maintenance. The sampling system does not require bottled air or sample pumps. Autocalibration solenoids, which allow remote activation of calibration tests, are standard
      SNR675 PrevEx® Flammability Analyzer
    5. Control Instruments’ Model 650 FID replaces each of the rack-mount’s design weaknesses with a superior solution. For example, the Model 650’s duct mount design eliminates heated external sample lines. The entire sensor section is heated to avoid condensation during sampling. Its air-aspired sample draw system eliminates the use of failure-prone pumps. And the Model 650 uses ambient air – not bottled air – to support the flame.
      Sample delivery is a critical factor in obtaining accurate readings. Many FIDs, however, suffer from reading errors caused by mechanical pump fluctuations.
      The Model 650 does not use a pump, but instead draws the sample using an aspirator driven by compressed air. Microprocessor control guarantees constant sample flow and pressure through the cell, assuring you the highest level of accuracy in final readings
      The Model 650 FID (The Only Total Hydrocarbon Analyzer Specifically Designed for Industrial Monitoring)
  • RKI Instruments:
    1. Patented water repellent sensor coating S-Series
    2. Available in LEL, O2, H2S, CO, H2, HC (ppm)
      LEL and O2 available with or without transmitter
      LEL and O2 available together in one standard compact enclosure
      The 35-3000RK (A) series is a compact sample draw detector assembly with a built-in pump that accepts a 24VDC input. This unit features a NEMA 4X enclosure making it dust, water and corrosion resistant. It also features a flowmeter with adjustable flow and a low flow alarm, which warns of any obstructions or restrictions in the flow system. Combustibles, oxygen, hydrogen sulfide and carbon monoxide versions are available with or without a 4-20 mA transmitter. The 35-3000RK (A) is also available with both LEL and oxygen sensors in one unit.
      The 35-3000RK (A) is capable of single person calibrations and remote sampling at up to 5,000 ft. from a controller, and interfacing to any RKI or third party control system (utilizing a 4-20 mA feedback signal). Large versions of this efficient sample draw system are available with up to four sensors, LEL, O2, H2S and CO all in one enclosure
      35-3000RK
    3. Explosion proof housing available
      Water repellent patented sensor coating
      Available for LEL, H2, O2, CO, and H2S
      Long life sensors (2 + years typical)
      The RKI direct connect series gas sensors are highly reliable and very cost effective for the detection of common gas hazards. The direct connect series are available for LEL, H2 Specific LEL, Oxygen, H2S, and CO for a variety of RKI's controllers. All sensors are explosion-proof with flame arrestors, and approved (optional non-explosion proof version available for oxygen for use in hazardous atmospheres).
      The direct connect sensors can be used in two different ways. The sensors can be mounted directly to the controllers as a complete stand alone system, or they can be mounted to explosion proof junction boxes for remote detection.
      The direct connect sensors can be used either indoors or outdoors. The flame arrestors for the explosion-proof versions utilize a patented coating which make them water repellent. Also, splash guards are available for use in very wet environments
      Direct Connect Sensors
    4. Detection Principle: Electrochemical cell
      The GD-K77D is a complete sample drawing gas monitor, including digital readout and alarm relays. A new gas sensor technology using an intelligent sensor for remote location calibration and setup is used. The new GD-K77D sensors are designed to provide a longer time period between calibrations. Calibration intervals have been cut in half to12 months of on-line service which equates to reduced maintenance cost. In addition, the sensors can be calibrated away from the gas detector installation, for example in a service area or offsite. This eliminates the inconvenience of having calibration gases in the fab or monitoring location. GD-K77D easily connects to an existing PLC system and is ideal for applications needing a local readout or where a relay control is needed
      GD-K77D Series
    5. Detection Principle: Electrochemical cell
      RKI offers unique proprietary sensor technologies for hydrogen specific detection in either the % LEL or PPM ranges. By utilizing a proprietary molecular sieve coating that is built into both our catalytic or solid state sensors, false alarms from typical hydrocarbon interfering gases are essentially eliminated.
      For the LEL range, a special catalytic sensor is coated with a molecular sieve that eliminates the response to common background gases like IPA, methane, gasoline, etc. while providing a detection range of 0 – 100% LEL for hydrogen.
      The hydrogen PPM sensor can reliably detect leaks 20 times smaller than a standard catalytic sensor. This solid state sensor has a molecular sieve coating on the sensing element, which filters out interference from other gases and provides a 0 – 2,000 PPM range
      H2 Specific


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