Sierra Monitor Corporation T10008 - Manual (Page 5)

OXYGEN DEFICIENCY MONITOR PAGE 3
3. Mechanical Description
3.1 The Model 55 is housed in a rugged, high impact enclosre. The
sliding ON/OFF power switch is located on the left side, the
calibration potentiometer is accessible on the right side and the
digital display is on the front surface. The top of the monitor and
the digital display is on the front surface. The top of the monitor
contains the sensor opening, jacks for earphone and remote
sensor , the alarm LED and audible alarms. See Figure 1.
3.2 Located on the back surface of the monitor are a belt clip and the
battery cover.