Combustible Gas GENERAL MONITORS Protection for life. Model S4100C Combustible Gas Addressable Transmitter Features • RS-485 Dual MODBUS Serial Output in addition to 4-20mA • Provides measurement, set-up and status of up to 247 nodes • Allows longer cable runs and lower cost installation • Selectable calibration gas level • Calibration with non-standard gas concentrations possible • Displays up to 120% LEL and alarm status • Fully adjustable alarm levels with open collector outputs • Lower wiring costs and flexible operation The General Monitors Model S4100C hydrocarbon gas Addressable Transmitter is a highly reliable, self-contained, microprocessor-controlled monitor with integral 3 digit readout. It is designed to measure and display concentrations of combustible gases in the range 0-100% LEL, but will continue to display concentrations up to 120% LEL. The sensing element may be incorporated in the transmitter housing or remotely mounted at distances in excess of 600m. • Refineries • Drilling and Production Platforms • Fuel Loading Facilities • Compressor Stations • Oil Well Logging The S4100C will record the number of successful calibrations, compute the sensor output as a percentage of the new sensor reference output during calibration and store in non-volatile memory, along with calibration and set-up parameters. • LNG/LPG Processing and Storage Facilities • Wastewater Treatment Facilities The S4100C’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, troubleshooting or configuration of the unit. Calibration level, A1 and A2 Alarm Trip levels are user selectable. Calibration from 25% to 90% LEL in 1% LEL increments and A1 and A2 Alarms from 10% to 60% in 1% increments. Calibration may be completed in less than 2 minutes. All parameters are tested by advanced software routines before being accepted. • Gas Turbines (remote high temperature sensor approved to 180°C) • Solvent Vapours • Chemical Plants

Sensor Type: temperature catalytic bead Hazardous area Display flashes for readings Fault Open Collector Output: Normally energised Analogue Output during Serial Communications Interface: Dual RS485 MODBUS, min. Zero Drift: Less than 5% of full scale per Response Time (input step): T50 < 10 seconds Approvals: Hazardous area standard - * User selectable The Electronics and Detector are suitable for a SIL 3 Stand Alone, Non Voting application and have a Safe Fail Figure of >99%(SFFF) Mechanical Specification Height excl. sensor: Height incl. sensor: Weight incl. sensor: Mounting holes: EExe II...