- 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

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

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