ISC/Oldham OLC20 Series User Manual

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2.2.3. Characteristics and Special precautions for oxygen detectors
• When the sensor is powered up or the measurement cell is replaced, it takes between 30 and
60 minutes for the measurement to stabilise at 20.9% v/v in pure ambient air.
• The use of an oxygen-rich atmosphere (> 25%) can compromise safety.
3. MARKINGS
3.1. Explosion-proof safety version : OLC20d and OLCT20 d
OLDHAM Arras
0080
OLC20d or OLCT20d
II 2GD
IP66
EEx dIIC T6 (85°C)
INERIS 01ATEX0004X
Do not open when powered.
Serial number, year of manufacture
3.2. Explosion-proof safety version: OLC20d High temperature HT
OLDHAM Arras
0080
OLC20d
II 2G
EEx d IIC T4 AmbT -25°C + 110°C
EEx d IIC T3 AmbT -25°C + 180°C
EEx d IIC T2 AmbT -25°C + 200°C
INERIS 01ATEX0004X
Do not open when powered.
Serial number, year of manufacture
3.3. Intrinsic safety version: OLCT20 i
OLDHAM Arras
0080
OLCT20i
II 1 GD
IP66
EEx ia IIC T4 (T135°C)
INERIS 01ATEX0004X
Do not open when powered
Serial number, year of manufacture

ISC/Oldham OLC20 Series Specifications

General

Brand	ISC/Oldham
Model	OLC20 Series
Category	Security Sensors
Language	English