6
３−２．
Name of each part and functions
① Oxygen sensor
: Galvanic type sensor to detect oxygen content.
② Sensor holder
: This is a retainer to hold the oxygen sensor
(equipped filter inside).
③ Sensor lead
: Lead wires for oxygen signal outputs.
④ Terminal strip
: Relayed terminal for sensor lead and external cable.
⑤ Cable gland
: Entrance to lead the cable (φ8〜φ11mm) from outside.
⑥ Hinge
: Hinge for front door.
⑦ Lock
: Lock for front door.
⑧ Mounting hole
: Mounting hole to fix this unit on the wall surface.
⑨ Protective earth bolt
: Bolt for protective grounding.
３−３．
System composition
(1) Intrinsically safe system
①
⑦
②
③
④
⑤
⑥
⑧
Detector
head
Ze
n
e
r
b
a
r
ri
e
r
Indicator
/alarm
unit
Hazardous area
Non-hazardous area
CVVS1.25sq
・
2C or
equivalent (MAX600m)
⑨
