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Gas Analyzers

Flammable Gases and Vapors

Process Monitoring System

  • Gas Analyzers of Control Instruments Corp.:
    1. The gas analyzer SNR671 is an industrial strength assembly consisting of a heated flame cell and an integrated controller that continuously measures total flammable vapor concentrations from 0 to 100% of the Lower Flammable Limit (LFL) range. Optional modifications allow the SNR671 to sample low oxygen and inert atmospheres.
      Operating Temperature: Sensor heated to 60°C (140°F).
      The system includes six relays: single-pole, doublethrow relays for Warning, Danger, Fault; and single-pole, single-throw relays for Horn, Calibration-in-Progress and Service Needed
      SNR671 PrevEx® Flammability Analyzer
    2. The gas analyzer SNR672 is an industrial strength assembly consisting of a heated flame cell and an integrated controller that continuously measures total flammable vapor concentrations from 0 to 100% of the Lower Flammable Limit (LFL) range.Optional modifications allow the SNR672 to sample low oxygen and inert atmospheres.
      Operating Temperature: Sensor heated to 120°C (248°F).
      The system includes six relays: single-pole, doublethrow relays for Warning, Danger, Fault; and single-pole, single-throw relays for Horn, Calibration-in-Progress and Service Needed
      SNR672 PrevEx® Flammability Analyzer
    3. The gas analyzer SNR674 is an industrial strength assembly consisting of a heated flame cell and an integrated controller that continuously measures total flammable vapor concentrations from 0 to 100% of the Lower Flammable Limit (LFL) range. Optional modifications allow the SNR674 to sample low oxygen and inert atmospheres.
      Operating Temperature Sensor heated to 200°C (392°F).
      The system includes six relays: single-pole, doublethrow relays for Warning, Danger, Fault; and single-pole, single-throw relays for Horn, Calibration-in-Progress and Service Needed
      SNR674 PrevEx® Flammability Analyzer
    4. The gas analyzer SNR675 is an industrial strength assembly consisting of a heated flame cell and an integrated controller that continuously measures total flammable vapor concentrations from 0 to 100% of the Lower Flammable Limit (LFL) range. Optional modifications allow the SNR675 to sample low oxygen and inert atmospheres.
      Operating Temperature Sensor heated to 270°C (518°F).
      The system includes six relays: single-pole, doublethrow relays for Warning, Danger, Fault; and single-pole, single-throw relays for Horn, Calibration-in-Progress and Service Needed
      SNR675 PrevEx® Flammability Analyzer
    5. The gas analyzer 650 comes equipped with solenoid valves for both Zero and Span test gas. The integral microprocessor automatically makes all calibration adjustments - You can initiate calibration from the front panel or a remote location.
      The Model 650 can display readings as Total Hydrocarbons by Volume or Weight (PPM Cv or mg/m3, respectively). An optional methane cutter enables measurement of non-methane hydrocarbons. Either calibration can be used to accurately read mixtures of solvent vapors.
      You can easily tie analyzers into your PLC , plant-wide data acquisition system or process control system. Or tie into any PC or laptop, either directly or through a modem. You can even add Control Instruments' operator interface for remote display and control
      The Model 650 FID (The Only Total Hydrocarbon Analyzer Specifically Designed for Industrial Monitoring)
  • Gas Analyzers of RKI Instruments:
    1. Available for LEL, H2S, CO, O2 , and ppm HC
      IR sensors available for LEL & CO2
      Long life sensors (2 + years typical)
      Measuring ranges: CO (65-2432RK) 0 - 500 ppm; HC (65-2460RK) 0 - 500 ppm; CO2 (65-2391RK-03) 0-5% Vol.; CH4 (65-2390RK-CH4) 0-100% LEL; HC (65-2390RK-HC) 0-100% LEL.
      The “S” series transmitters are available for LEL, Oxygen, H2S, CO, or for 0 - 500 ppm Hydrocarbon detection (for various fuels or solvents). The electronics are encased inside a potted package to avoid damage from mechanical abuse or corrosion, and the amplifier is installed inside an explosion-proof enclosure.
      The only tools required to calibrate the “S” series are a voltmeter, screwdriver, and cal gas. The zero and calibration functions are performed by adjusting potentiometers on the amplifiers. The amplifier has test jacks for connection of a voltmeter for calibration purposes, and the sensor response is viewed on the voltmeter as a 100mV to 500mV signal
      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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