- Model ID-221 - Oil Sheen Sensor

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Leakwise - Model ID-221 - Oil Sheen Sensor

The Leakwise ID-221 Sensor, which is used with a Leakwise controller, is installed in sumps and groundwater monitoring wells to detect floating oil sheens resulting from oil leaks in underground storage tanks and pipelines.

Additional applications include:

  • Monitoring hydrocarbons and other organic solvents during site assessment and remediation
  • Detecting and monitoring floating hydrocarbons in sewer systems, waste water treatment systems, oil/water separators, cooling water trenches and canals, storm water run-offs, retention ponds and sumps, and boiler condensate tanks

The ID-221 can detect as little as 0.3 mm layer of oil on water reliably, repeatedly, and without false alarms. It can also monitor on-line changes in oil layer thickness. The controller relays can initiate both local and remote alarms, as well as control. Continuous built-in diagnostics monitor sensor operations.

The ID-221's high frequency transmitter is mounted on a patented float, which maintains its position precisely at the liquid/air interface, despite fluctuations in the liquid level. It has two field adjustable alarm points:

  • Low oil alarm — Detection of a predefined layer of hydrocarbons
  • High oil alarm — Detection of a hydrocarbon layer at a second predefined thickness

A stilling well is recommended for all ID-221 installations

Leakwise ID-221 Sensor Specifications

Sensor Operating Range

  • 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) from the bottom of a well/tank/sump; Maximum: 45 m (~150 ft)
  • Water Lateral Velocity : ~20 cm/sec (~8 in/sec) when installed in a stilling well
  • Temperature : 0–70° C (32–158° F)

Sensor Physical Specifications

  • Detector :
    • Materials: Hydrocarbon resistant polymers, 316 stainless steel
    • Diameter 87 mm (3.4 in), height 150 mm (5.9 in), fits into 96 mm (4.0 in) stilling well
  • Cable : 10 m (~33 ft) supplied with sensor, additional length to order up to 45 m (~150 ft) total

PS-220 Controller Specifications

  • PS-220 Description : The PS-220 Controller is an analog signal processor and power supply in a NEMA enclosure that comes standard with the ID-221.
  • Temperature : Ambient temperature range: -40–85° C (-40–185° F)
  • Cable distance to PS-220 : Up to 1,200 m (3,937 ft) subject to hazardous area restrictions
  • PS-220/RL/LI : Two alarm relay contacts and one fail contact: SPDT rated 4A (3A for fail contact) at 250 VAC or 30 VDC, normally open and normally closed, and four indicating lights: Air/Oil/Water/Fail. Includes built-in diagnostics feature.
  • Wiring Connections : 14 AWG maximum for sensor and 4-20 mA output wires; 12 AWG maximum for power and relays wires

PS-220 Controller Options

  • Enclosure Options : NEMA 4X (IP-65): 300 x 190 x 120 mm (12.0 x 7.5 x 4.7 in) (standard enclosure); NEMA 7: 278 x 259 x 166 mm (11.0 x 10.2 x 6.5 in); EEx d: 302 x 233 x 154 mm (12.0 x 9.2 x 6.1 in)
  • Input Power Options : 220/110 VAC, 9–36 VDC (@ 5 Watts), may also be solar powered
  • PS-220 420 : 4–20 mA signal proportional to hydrocarbon thickness up to 25 mm (1.0 in)—current source
  • PS-220 420/BG : Bar graph display (20 bars) of hydrocarbon thickness and 4-20 mA output
  • AUD : Audio alarm option (available in weather- or explosion-proof enclosure)

Other Controllers

  • WSP-220 : Wireless communication (consult factory for more details)
  • DSP-220 : Digital Signal Processor for Multiple ID-220 Series (8 standard, up to 40 optional)
  • Sensor Control with various output options, including: relays, lights, 4-20 mA and RS-232 or RS-422 communications (consult factory for more details)

Sensor and Controller Certifications

  • ID-221 Sensor : Intrinsically Safe — EEx ia IIC T4
  • PS-220 Enclosure : For hazardous areas: North America — NEMA 7, Class I, Div 1, Groups B, C & D; NEMA 4
  • Europe — ATEX EEx d IIC T6 IP66
  • Combined System Performance : Approved for operation in hazardous location
  • EPA — Conforms to EPA/530/UST-90-009 for groundwater monitoring systems
  • TÜV — Type approval in accordance with WHG (Water Resources Law) § 19 h
  • Manufacturing : ISO 9001 Certified
  • Safety : CE Certified

GE Analytical Instruments
GE Analytical Instruments
6060 Spine Road
Boulder ,  CO 80301


Groundwater monitoring for oil tank leaks

Leakwise can detect oil leaks from tank bottoms much more quickly than other manual methods, thus reducing the risk of severe groundwater contamination.

Water discharge monitoring for retention tanks

Leakwise detects oil buildup in retention tanks at the end of the treatment process and prevents the discharge of oily water into the environment.

Stormwater Discharge Monitoring for Oil Spills

Leakwise can detect oil spills in stormwater due to runoff and open channels before discharge into public water.

Oil spill detection for offshore

Leakwise systems can be installed off rivers, oil terminals, oil ports and other locations for the early detection of oil spills. Leakwise can significantly reduce the risk of major environmental contamination.



Leakwise Oil-on-Water Demo Video

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