The Sentry 4202GFC is a highly integrated gas flow computer incorporating a multivariable sensor and a complete PLC. The product is compatible with standard programming environments including IEC 61131-3. Coupled with a second multivariable transmitter, the Sentry 4202GFC can be used as a two-run gas flow computer!

The Watchdog 1100, our most basic callout monitor, has been designed and engineered with the field operator in mind. Utilizing our unique “English” speaking voice communication and auto dial-out features, this high tech remote monitoring system provides unparalleled performance, reliability and dependability. The Watchdog 1100 supports both Altronic and Frank W. Murphy Annunciators.

FEATURES and BENEFITS

• AGA-3, 7, 8, V-Cone and API 21.1 compliant
• Two RS-232/485 selectable serial ports
• 1 RTD, 1 turbine meter input
• 1 digital pulse/input/output, 1 analog output – DR version
• 1 digital pulse/I/O, 2 AI, 1 DO shared with the turbine meter input – DS version
• Modbus master/slave and Modbus EFM protocols
• Small and lightweight with flexible installation options and easy retrofit applications
• cULus Class 1, Division 1, Hazardous Area Rating

APPLICATIONS

With a choice of I/O configurations available, the 4202GFC can accommodate multiple input and output devices and can be easily expanded for more complex installations. The 4202GFC’s two discrete inputs are versatile, the first of which can use level or pulse input up to 10 kHz. The second discrete input has
an integral pre-amplifier for use with turbine meters. An optional analog output can be used for variable speed motor drives, control valves, emergency shutdown and more.

Alternatively the 4202GFC can be ordered with two analog inputs that could be used for measuring tubing and casing pressures in well applications.

The Sentry 4202GFC provides two, fully functional RS-232/485 serial ports that can be used with remote I/O, radios, local displays or other serial devices. The unit provides Modbus master/slave and EFM Modbus as its native protocols. DNP 3.0 is optionally available and custom protocols can be
easily implemented using the TelePACE C programming tools.

As a fully programmable gas flow computer with remote configuration capabilities, the Sentry 4202GFC can be used in a wide range of process control applications including: well optimization, pressure control, odorant injection and more. The cULus Class 1 Division 1 Hazardous Area Rating also makes it ideal for use in petrochemical, industrial and below-grade municipal applications.

FLEXIBLE INSTALLATION

The Sentry 4202GFC incorporates a highly accurate multivariable sensor that is
compact and rugged. The 2-1/8” tap centers enable cost effective use of 3 and 5 valve instrument manifolds. The 4202GFC flow computer can be installed horizontally or vertically for easy retrofit of any conventional differential pressure transmitter.

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