GD heavy duty
The Heavy Duty gas detection units are used for monitoring and warning of hazardous Ammonia gas concentrations. They are intended for ATEX/ IECEx applications and consists of a robust flameproof metal enclosure that can be kept closed after wiring, since programming (configuration) is performed by magnetic field to the display via a magnetic pen. Depending on the application, they are available with an electrochemical, a semiconductor or a Pellistor sensor covering a wide range of ppm.
The Heavy Duty gas detection units are intended as Stand-alone, or connected to a central system like Gas Detection Controller Unit, or a PLC.
As stand-alone the on-board relay can be used for activation of alarm devices, while the Analog or RS485 Modbus connection to a central system allows additional centralized monitoring and alarm activation.
The gas detection units come with a factory default, 2-step alarm set-up ready for use.The integrated software enables the user to configure two individual alarm ranges. Alarm 1, a pre-alarm indicating the gas level has passed a predefined threshold 1, and - if the gas level passes predefined threshold 2 - the final alarm 2.
Features and benefits
- Digital, factory configured and pre-calibrated gas detectors for plug-and-play installation (no adjustment required)
- Easy configuration via Display and Magnetic pen and intuitive user-interface; helps simplify operator handling andminimize risk of operational, settings and calibration errors
- Stand-alone (integrated relay) and/or flexible connection to central controller - by either Analog or RS485 openModbus communications
- A wide selection of sensor types and detection ranges is available, and the display background turns red to indicate an alarm or communication fault
- Fieldbus wiring allows connection and power for up to 96 sensors with a maximum segment length of 900 m (2953 ft), and controller expansion modules enable additional segments and alarm relays. The system also features automatic self-diagnostics to ensure proper communication and operation, with an on-board fault relay
- A sensor seal cap prevents premature exposure during installation, while the digital user interface ensures high accuracy and temperature-compensated sensors reduce the risk of false alarms
- Password-protected alarm settings allow authorized access only, and the LCD display with status LED works together with a magnetic pen or on-board acknowledge button to reset alarms and verify that no gas leaks are present
- Service alerts on the unit, controller, or both are readable via the service tool display, and quick, precise calibration can be performed using Plug & Play replacement sensors or calibration gas—no potentiometers or multimeters required
- For improved safety and to optimize the lifetime of the sensor, degenerated sensors with too low sensitivity (<30%) are rejected during calibration process
- Conforming to Ex d EN 60079-0/-1, Ex d IEC 60079-0/-1, EN 50402, EN 61508-1/-2/-3, and EN 50271, and certified under BVS 18 ATEX E 052 X and IECEx BVS 18.0044X, the device also enables regulatory compliance with EN 378:2016, ISO 5149:2014, IIAR 2-2017, and ASHRAE 15:2016