Tag: current transmitters

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Greystone-CO Detectors

CARBON MONOXIDE (CO) DETECTORS
CMD Series: Precision gas control/sensing. Peace of mind through reliable gas monitoring.  The CO Detector sense and transmit to any compatible electronic analog control, DDC/PLC controller or automation system for the control of ventilation equipment.

The CO Detector features electrochemical sensing elements with a menu driven setup/calibration. It is powered by either AC or DC source with no change to circuit required. A choice of three field adjustable analog output signals, linearized over full range is available.

FEATURES:

  •  Surface or Duct mount models
  • Long-life, replaceable electrochemical sensor
  • Optional LCD display
  • Optional relay outputs & audible alarm
  • Superior Electrochemical sensing elements
  • Set up/calibration fully menu driven (requires LCD option)
  • 0-300 PPM standard (5%), other ranges available
  • 0-500 PPM for (3%)
  • Optional on board relays with field adjustable trip point.
  • Optional LCD for displaying PPM level and menu options.
  • Powered by either AC or DC source with no change to circuit required.
  • Choice of three field adjustable analog output signals, linearized over full range.
  • Modbus communications option.
  • Field replaceable calibrated sensor module.

CO DETECTOR:
Environmental, industrial and commercial indoor Carbon Monoxide (CO ) gas detector. Available in both a space and duct mount version.

APPLICATION:
To sense and transmit carbon monoxide levels to any compatible electronic analog control, DDC/PLC controller or automation system for the control of ventilation equipment. Typical usage in underground Car Parks.

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Conveyor Jam Protection – NK Technologies

When conveyors jam and the drive motor continues to run, expensive mechanical damage to the drive components often occurs. By installing an NK Technologies’ Current Operated Switch an overload condition, detected by higher than normal running amps, can be used to switch off power to the motor before mechanical damage results. The switch setting can be adjusted so it is not affected by normal changes in conveyor load. Current operated switches are the modern day equivalent of less reliable electromechanical jam relays that have been in use for many decades.

In situations where there may be large variations in load an NK Technologies Current Transducer can be used to monitor conveyor motor amp draw and output this data to the conveyor control systems, commonly a PLC. The PLC may be programmed to accomodate different setpoints for different mechanical loads so that jam protection is provided from light to heavy loads. In situations where the conveyor is not able to accept analog signals NK Technologies has developed a patented transducer with a frequency output suitable for the Digital Inputs of most PLC’s.

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Motor Monitoring Applications – NK Technologies


Electric motors are found extensively in both the manufacturing and processing industries. Both AC and DC powered motors are used to drive pumps, fans, conveyors and a broad range of specialized equipment. There are many types of motors designed for many different applications, however all require electrical current in order to generate the magnetic fields that are necessary to create rotation. By measuring this current useful information can be made available regarding the status of the motor and the equipment that is connected to it. This may be as basic as independently verifying the run status of the motor or in conjunction with a PLC, for example, to protect a pump against dry run. Thus current may be used to both monitor and protect motors and motor-driven equipment.

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