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A complete suite of Hart-enabled gas and flame detectors is now available from General Monitors.

These safety instruments are designed to protect employees, equipment and facilities from the dangers of hydrocarbon gases, toxic gases, oxygen depletion and flames.

Designed to detect combustible gas in the lower explosive limit (LEL) range, the company’s compact IR400 infrared gas detector offers fail-to-safe operation for high reliability.

The S4000CH combustible gas detector, designed for use with General Monitors robust catalytic bead sensors also protects against explosive gas in the LEL range.

The Hart-enabled S4000TH H2S detector guards against the hazards of hydrogen sulphide gas with metal oxide semiconductor (MOS) sensing technology.

The TS4000H toxic gas detector is designed with galvanic isolation that allows hot swapping of electrochemical gas sensors to detect a wide range of toxic gases as well as oxygen depletion.

The FL4000H multi-spectral IR flame detector is Hart compatible, designed with neural network intelligence for false alarm immunity and features a wide field of view over a long range.

The company’s FL3100H UV/IR and FL3101H UV flame detectors are also Hart compatible and suitable for a wide range of flame detection applications.

Hart is a communications protocol that provides uniform and consistent communication without disturbing the integrity of the 4-20mA analogue signal.

In addition to the process variable, the Hart protocol permits access to device configuration, diagnostics, as well as maintenance and alarm records.

As a result, a whole host of additional information related to plant operation is available to the control room through Hart.

Hart is backwards compatible with the installed base of instrumentation currently in use.

Standard Hart commands can allow systems to configure and adjust the gas and flame detectors to the particular requirements of the plant.

A flame detector, for example, can be tagged with a name for greater ease of use (for example, Reactor 1 Flame Detector).

Alarm and warning set points can be adjusted, delay times set and alarms acknowledged or reset by simply sending a command.

Such real-time, continuous access to device variables improves control.

Because these detectors are equipped with event logging, managers and technicians have access to time-stamped records of all maintenance performed on the device.

These records are particularly useful during quality system audits, and since they are generated automatically, make producing documentation on demand more efficient.

Through Hart, users can also check the status of the safety instruments and respond to a fault when it is issued.

Guesswork is eliminated.

Supplied with information about the nature of the fault and its frequency, workers can make accurate diagnostics about the condition of the device before setting foot on the field.

Incorporating Hart into gas and flame detectors is said to enhance the usefulness of these detectors, permitting users to integrate the devices more fully into process automation.

Beyond maintenance, plants stand to gain from greater workforce efficiency, asset performance and fewer unplanned shutdowns.

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