Early detection of oil leaks and spills.

ID-221 Oil sheen sensor

early detection of oil spills
mitigate risk of water pollution
minimal maintenance

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The ID-221 Oil Sheen Sensor from Leakwise detects the presence of thin layers of hydrocarbons on water, and monitors their build-up. 

It is used for the early detection, warning and control of oil leaks and spills in wet sumps, tanks and groundwater monitoring wells.  It can also be used to detect and monitor hydrocarbons in oil/water separators, cooling water trenches, storm water run-offs, retention ponds, boiler condensate tanks and waste-water sewer systems. 

The ID-221 Oil Sheen Sensor is used in conjunction with one of three controllers, depending on the application.

  • The PS-220 Controller is an analog signal processor and power supply in a NEMA 4 enclosure, and supports a single ID-220 Leakwise sensor.
  • The SLC-220 Digital Signal Processor for Multiple (2 / 4 standard, more in a network) ID-220 Series sensor support, with various output options, including relay, lights, 4-20 mA, LCD, Modbus in RS-232 and RS-485 communication, and cellular remote connectivity.
  • The WSP-220 Wireless communication – Point-to-Point data radio.


Detection Range

0.3 - 25 mm (0.01 - 1.0 in) of hydrocarbon on water or brine

Water level variation

Minimum: 30 cm (~12 in) above well/tank/sump bottom; Maximum: 45 m (~150 ft.).

Water lateral velocity

~20 cm/sec (~8 in/sec) when installed in a stilling well

Water temperature

0 - 70° C (32 - 158° F); no freezing

Air temperature

-10 - 80° C (14–176° F)


Hydrocarbon resistant polymers, 316 stainless steel;


Ø: 87 mm (3.4 in), height: 150 mm (5.9 in); fits into 96 mm (4.0 in) stilling well

Integral cable

10 m (~33 ft.) supplied with sensor, additional length to order up to 50 m (164 ft.) total


ATEX Intrinsically Safe: II1G Ex ia IIC T4 Ga -40° C to +70° C. Also: IECEx and CETLUS


Combined with PS220/N4, approved for operation in hazardous location.


EPA - Conforms to Spill Prevention, Control and Countermeasure (SPCC) - Oil Pollution
Prevention regulation (40 CFR part 112), and EPA/530/UST-90/009 - Leak Detection Methods
TÜV - Type approval in accordance with WHG (Water Resources Law) § 19 h


ISO 9001:2015 Certified


Stilling well

In 1 m and 2 m long sections, which can be assembled to any required length.