Oil on water measurement systems


measure oil on water
mitigate risk of water pollution
minimal maintenance


PS-220 Controller is an analog signal processor and power supply in a NEMA 4 enclosure, and supports a single oil sheen sensor

Temperature range

-40 to 85 °C (-40 to 185 °F)

Cable length to sensor

Up to 1,200 m (3,937 ft) subject to hazardous area restrictions


Two alarm relay dry contacts and one fail contact: SPDT rated 4A (3A for fail contact) at 250 VAC or 30VDC, normally open and normally closed, and four indicating lights: Air/Oil/Water/Fail.  Includes a built-in diagnostics feature.

Wiring connections

Terminal blocks: 14 AWG maximum for sensor and 4 to 20 mAoutput wires; 12 AWG mximum for power and relays wires.


For options of enclosures, input power, and added features, contact IMA Ltd.


North America

NEMA 7, Class I, Div 1, Groups B,C,&D; NEMA 4


II2GD Ex d IIC T6 IP66


Other controllers are available; contact IMA Ltd to discuss


All specifications subject to change