Product Details  Inficon Bayard-Alpert Gauge Model BAG100S  Inficon Bayard-Alpert Gauge Model BAG100S The Bayard-Alpert Gauge BAG100S covers an extremely wide measurement range with excellent reproducibility in the process pressure range. The sensor employs two filaments which are made of long-life yttrium oxide coated iridium for standard applications or alternatively tungsten, which is more compatible with halogens (Cl, Fl, Br) or hydrogen gas compositions. The gauge features selectable analog as well as digital communications by RS 232 C interface or fieldbus options like ProfibusDP and DeviceNet. The IP54 rating ensures protection against dust, water spray, and electromagnetic interferences. User Advantages Wide measurement range of 2 x 10 -10 to 1 x 10 -1 (1.5 x 10 -10 to 7.5 x 10-2 Torr) with a single sensor  High reproducibility of ±10% of the measurement value within the process pressure range  Fully encapsulated sensor with a very stable electrode geometry  Longer life through dual cathodes - automatic switchover in case of failure  Long-life iridium cathodes with yttrium oxide coating Continuous measurement available during electron bombardment degas  Easy-to-exchange sensors with automatic self-adjustment to maintain reproducibility  Relay contact switching threshold adjustable over a wide range  Analog output with selectable logarithmic / linear characteristic  Digital interfaces: RS 232 C / Fieldbus: Profibus DP or DeviceNetTM  Rugged IP 54 metal enclosure  High EMI compatibility through screened enclosure, screened sensor, and interference suppression on all inputs and outputs  The innovative Bayard-Alpert Transmitters BAG100-S offer a wide measurement range spanning from 2 x 10 -10 to 1 x 10 -1 mbar. The wide range Bayard-Alpert measuring system is mechanically protected by the metal tube which surrounds it. The rugged arrangement of the electrodes ensures highly repeatable measurements over the entire range. Each sensor is individually calibrated in the factory. The calibration data are stored in an EEPROM which is fully integrated into the sensor. When exchanging the sensor, the electronics of the transmitter are automatically adjusted to the currently connected sensor so that the specified reproducibility can be guaranteed. The sensor with a CF flange is equipped with a welded current feedthrough which enables degassing of the sensor at a temperature of 150 oC with the electronics in place. Sensor supply and processing of the measurement data is performed by microprocessor controlled electronics which require a 24 V power supply and draw a very low current. The microcontroller also controls the BAG100-S and BAG101-S in that it monitors the emission, converts and corrects the measurement data (automatic correction of the sensor's sensitivity, matching of the unit etc.) and monitors the trigger thresholds for the relay. The selectable signal output characteristics (linear / logarithmic) as well as the digital computer interfaces permit easy integration in existing or future system concepts. Fieldbus  Fieldbus allows processes or applications the flexibility and control of network communications. It permits communication of exact digital information, independent control, maintenance and diagnostic routines for each connected instrument and simplifies your connection diagram. The measures of control include: monitoring of measurement values, automatic zero point adjustment of gauges, update operator of scheduled maintenance work, warning signals in case of instrument failure, and more. Profibus DP  The central automation systems, e.g. PLC/PC or process control systems, communicate through a fast serial connection with decentralized instruments such as I/O, motors, valves and pressure transducers. The exchange of data with the decentralized instruments takes place mostly in cycles. The basic functions of the Profibus DP Communication Profile also include acyclic communication services for parameter setting, controlling, monitoring, and alert functions of intelligent instruments. DeviceNetTM  The DeviceNet interface supports polling, bit strobe and change of state/cyclic commands. Like with other DeviceNet instruments the user can monitor and control all available sensor functions.