GENERAL MONITORS Protection for life. Model S4100T H2S Addressable Transmitter Features • RS-485 Dual MODBUS Serial Interface in addition to 4-20mA • Provides measurement, set-up and status of up to 247 nodes • Allows longer cable runs and lower cost installation • User changeable H2S range • Convenient, flexible operation • Displays over-scale readings and alarm status • Single-point calibration • Easy, fast and simple one-man calibration • Fully adjustable and configurable opencollector outputs • Lower wiring cost and flexible operation The General Monitors Model S4100T Hydrogen Sulphide Addressable Transmitter is a highly reliable, self contained, microprocessor-controlled single point monitor with integral 3 digit readout. It is designed to measure and display concentrations of H2S in three ranges: 0-20ppm, 0-50ppm or 0-100ppm, but will continue to display concentrations up to 120% FSD. The sensing element may be incorporated in the transmitter housing or remotely mounted at distances in excess of 600m. The S4100T will record the number of successful calibrations and compute the sensor resistance in Kohms during calibration and store sensor condition data in a non-volatile memory, together with calibration and set-up parameters. • Desulphurisation Facilities The S4100T’s user interface is menu driven. In addition the instrument may be addressed via the Dual MODBUS RTU interface which is based on the RS-485 standard. The MODBUS output provides status, alarm, fault and other information for operation, trouble-shooting or configuration of the unit. A1 and A2 Alarm Trip levels are user selectable in 1ppm increments from 1-19ppm for 0-20ppm, 5-45ppm for 0-50ppm or 10-95ppm for 0100ppm measuring range. Calibration level is 50% of selected measuring range. • Drilling Platforms and Rigs • Gas and Oil Production Platforms • Mud Logging Operations • Heavy Water Nuclear Facilities • Wastewater Treatment Plants • Chemical Plants • Well Head Sites • Oil Recovery/Reinjection Sites

Sensor Type: Hydrogen Sulphide Gas Monitor Continuous diffusion. Thin-fim MOS, adsorption type Display flashes for readings Calibration level: 50% of selected measuring A1 Trip level: * 1ppm increments 1-19ppm for measuring range, default 10ppm measuring range, default 25ppm A2 Trip level: * 1 ppm increments 1-19ppm for measuring range, default 25ppm measuring range, default 50ppm Output: * Energised/de-energised. Fault Open Collector Output: Normally energised Analogue Output during Serial Communications Interface: Dual RS485 MODBUS, min. Stability, Long whichever is greater (over 21 Response...