Oldham OLCT 20 - Description; Main Characteristics of the Various Versions; Overview

2 – Description
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| Description
Overview
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.
Main characteristics of the various versions
OLC 20
OLCT 20
LEL
LEL
TOX/O
2
Flameproof design
Intrinsic safety design
3-wire cable / Wheatstone bridge
3-wire cable / 4-20 mA output
2-wire cable / 4-20 mA output
Catalytic sensor
Electrochemical sensor
Replacement catalytic sensor
Replacement pre-calibrated
sensor