4
３−２．Name of each part and functions
① Oxygen sensor
: Galvanic type sensor to detect oxygen content.
② Sensor retainer
: This is a retainer to hold the oxygen sensor
(equipped with 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
Detector
head
Zener barrier
Indicator
/alarm
unit
Hazardous area
Non-hazardous area
CVVS-2C 1.25mm
2
or equivalent (max 600m) cable
⑥
⑨
⑤
③
⑦
①
②
④
⑧
