Model S4000T
1
2.0 Introduction
2.1 General Description
The Model S4000T is an Intelligent Sensor for the detection of Hydrogen Sulfide
(H
2
S) gas. The microprocessor-based electronics process information at the sensor
site, within an explosion-proof housing.
A digital display provides indications and display codes that can be viewed through a
window in the cover. A red LED above the digital display signifies an ALARM
condition, while a red LED below the digital display signifies a WARN condition.
Analog signal (4-20mA) optional Dual Redundant Modbus communications and
relays, provide remote and/or discrete indications of the sensor’s operation.
The model S4000T Intelligent Sensor is rated explosion-proof for use in the following
hazardous areas:
• CSA/FM: Class I, Division 1, Groups B, C, D and Class I, Zone 1, Ex d IIB+H
2
, T6
and
• CENELEC: EEx d IIB, T5 and T6
Figure 12 Model S4000T Intelligent Sensor
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