S4100C Combustible Gas Detector (EU approvals)0 pages

Combustible Gas
GENERAL MONITORS
Protection for life.

Model S4100C
Combustible Gas
Addressable Transmitter
Features

Benefits

• RS-485 Dual MODBUS Serial
Output in addition to
4-20mA

• Provides measurement, set-up and
status of up to 247 nodes

• 10-35 VDC Operation

• Allows longer cable runs and lower
cost installation

• Selectable calibration gas
level

• Calibration with non-standard gas
concentrations possible

• 3 Digit display

• Displays up to 120% LEL and alarm
status

• Fully adjustable alarm levels
with open collector outputs

• Lower wiring costs and flexible
operation

Description

Applications

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