Bridge Type Detectors for Flammable Gases - OLC20/20D Sensor

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:

version OLC20 or OLCT20

- designed to be screwed onto a housing using the equipment's 3⁄4 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.

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.