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1
Description
1.1
General
OLC 20
gas detectors are catalytic type detectors intended for the detection of combustible
gases. They are flameproof certified (OLC 20d).
OLCT 20
gas detectors are 4-20 mA transmitters and are intended for the measurement of
combustible and toxic gases and oxygen. They are either flameproof certified (OLCT 20d)
or intrinsically safe certified (OLCT 20i).
OLC 20s
and
OLCT 20s
are available in ¾ NPT or M25 screw fittings and are designed to
be attached on a junction box or any compatible generic transmitters.
1.2
Main characteristics of the various versions
OLC 20
OLCT 20
LEL
LEL
TOX/O2
Flameproof design
X
X
X
Intrinsic safety design
X
3-wire cable / Wheatstone bridge
X
3-wire cable / 4-20 mA output
X
2-wire cable / 4-20 mA output
X
Catalytic sensor
X
X
Electrochemical sensor
X
Replaceable sensor
X
Replaceable and pre-calibrated sensor
X
X