I
I
.
.
D
D
e
e
s
s
c
c
r
r
i
i
p
p
t
t
i
i
o
o
n
n
o
o
f
f
t
t
h
h
e
e
O
O
L
L
C
C
/
/
O
O
L
L
C
C
T
T
2
2
0
0
f
f
a
a
m
m
i
i
l
l
y
y
1. General
The gas detectors in the OLC20 series are catalytic cell type detectors intended for the
detection of combustible gases. They are only available in explosion proof protection mode,
the approved type is OLC20D. A special OLC20 HT (High Temperature) version provides
detection in ambient temperatures up to 200°C.
The OLCT20 type gas detectors are 4-20 mA transmitters (3-wire or 2-wire T signifies
Transmitter) and are intended for the measurement of combustible and toxic gases and
oxygen. They are available in explosion proof protection mode (The approved type is
OLCT20D) or in intrinsic safety protection mode (the approved type is OLCT 20i)
Series OLC20 and OLCT20 consist of two types of detectors or transmitters:
Ø version OLC20 or OLCT20
− designed to be screwed onto a housing using the equipment's ¾ NPT or M25
screw fitting (standard),
− connected to the measurement data logger inside the housing equipped with a
cable with a standard length of 40 cm.
Ø version OLC20D or OLCT20D (D signifies remote version)
− mounted in place by means of a bracket supplied as an accessory,
− supplied with 5, 10 or 15 metre length of shielded cable and which can be
connected to the measurement data logger either directly or via a branch box if
the cable length is greater.
OLC20
OLC20D
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