10 • Chapter 2: Description HS-04 Operator’s Manual
Chapter 2: Description
Overview
This chapter describes the HS-04 instrument and its accessories.
Instrument Description
Case
The HS-04’s sturdy, high-impact plastic case is radio frequency (RF) resistant and is suitable for
use in many environmental conditions, indoors and out. The case is dust proof and water resistant.
A clear plastic window is located on the front of the case for viewing the LCD. The sensor
retainer is located on the right side of the case and allows access to the filters and sensor. A feature
in the lower left corner of the rear case is used to install the optional wrist strap.
LCD
A digital LCD (liquid crystal display) is visible through a clear plastic window in the top case.
The LCD shows the gas reading. The LCD also shows information for each of the HS-04’s
operating modes.
Battery Cover Screw
Battery Cover
AIR
H
2
S
LCD
Buzzer Opening
IrDA Port
Control Buttons
Wrist Strap
Connection
POWER
MODE
Diffusion Port
Alarm LED
Figure 1: Component Location
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