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Crowcon PL4+


The PL4+ represents the most cost-effective solution for the detection of flammable, toxic and Oxygen contents in small systems.

This panel provides 4 analog 4-20 mA that can be upgraded to 8 by using a 4-input expansion module, easily connectable directly onto the unit. The control panel comes complete with 5 relays, one for each threshold (AL1, AL2, AL3), 1 for fault (FLT) and 1 programmable.

The extension board ST.PL4/ESP offers 4 additional inputs and 16 electrical Open-Collector outputs.

The LCD display assures a precise indication of the gas concentration being measured and the alarm set points.

Mode status LED’s provide a visual indication for alarm levels, fault and power-on. An internal buzzer is provided for an audible alarm with front panel reset facility.


The PL4+ ABS cabinet is rated to IP65 and can accommodate a 12 VDC, 7Ah additional battery to ensure its correct working when power supply fails. The PL4+ is SIL1 and ATEX certified according to EN60079-29-1.

Crowcon PL4+

SIL1 and ATEX Certified
Manufacturer: Crowcon
SKU: PL4+
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Crowcon PL4+

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