HS-04 Operator’s Manual Chapter 1: Introduction • 7
Chapter 1: Introduction
Overview
This chapter briefly describes the HS-04 gas monitor. This chapter also describes the
HS-04 Operator’s Manual (this document). Table 2 at the end of this chapter lists the
specifications for the HS-04.
About the HS-04
Using an advanced detection system, the HS-04 personal gas monitor detects the presence of
hydrogen sulfide (H
2
S). The HS-04’s compact size and easy-to-use design make it ideally suited
for a wide range of applications, including sewage treatment plants, utility manholes, tunnels,
hazardous waste sites, power stations, petrochemical refineries, mines, paper mills, drilling rigs,
and fire fighting stations. The HS-04 offers a full range of features, including the following:
• Liquid crystal display (LCD) for complete and understandable information at a glance
• Ultrabright alarm LED
• Distinctive audible/vibrating alarms for dangerous gas conditions and audible alarms for
unit malfunction
• Microprocessor control for reliability, ease of use, and advanced capabilities
• Data logging functions
• Alarm trend data
• STEL, TWA, and over range alarms
• Peak reading
• Built-in time function
• Lunch break feature
• QPS “C/US” classification for Class I, Division I, Groups A, B, C, and D hazardous
atmospheres
WARNING: The Model HS-04 detects elevated levels of hydrogen sulfide which can be
dangerous or life threatening. When using the HS-04, you must follow the
instructions and warnings in this manual to assure proper and safe operation of
the unit and to minimize the risk of personal injury. Be sure to maintain and
periodically calibrate the HS-04 as described in this manual.
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