Geologic Resources: Tools for Geoscientists & Engineers

H.OIL Oil/Water Interface Meters
by Heron Instruments, Inc.

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The H.OIL oil/water interface probe/meter is used to accurately measure the thickness of floating product (LNAPL) above the water table. It will also detect and measure sinking layers of dense non-aqueous phase liquid (DNAPL).  The H.OIL with it's slim probe 5/8-inch (16 mm), is ideal for wells, piezometers, and direct push equipment as narrow as 3/4-inch (19 mm) ID.  The end probe and tape will withstand hydrocarbons, solvents, and other contaminants. This unit is used by professionals involved with the monitoring and remediation of groundwater contaminated by oil products. The H.OIL oil/water interface probes are suitable for wells, boreholes, underground and above ground storage tanks.  Features include:

  • Top Quality Kynar Jacketed Accurate Engineering Grade Tape. Complies with US tape standard (US 999-T-106E)
  • Certified Intrinsically safe CSA/NRTL Class 1 Gr A.B.C.D.
  • Will detect LNAPLs and DNAPLs without changing probe.
  • 5 Year Warranty*
  • Carrying bag and cleaning kit included

If you're interested in a smaller, more portable instrument equipped with 60 feet (20 m) of tape, check the Sm.OIL oil/water interface.

*Some conditions apply


                                                   FREE Ground Shipping to destinations in the 48 contiguous US States.


H.01L Oil/Water Interface Probes/Meters
(Tape markings are in feet and fractions or metric units)

      Tape Length
(Either feet or meters)

Item Number

Shipping Wgt.
      50 ft or 15 m 3000FT or 3007M 12.5 lb $980.00      
      100 ft or 30 m 3001FT or 3008M 14.0 lb $1,050.00      

H.OIL oil/water
interface meter

  150 ft or 45 m 3002FT or 3009M 15.0 lb $1,100.00      
    200 ft or 60 m 3003FT or 3010M 17.0 lb $1,200.00      
    300 ft or 100 m 3004FT or 3011M 20.0 lb $1,350.00      
    500 ft or 150 m 3005FT or 3012M 26.0 lb $1,750.00      

 *Price is in U.S. Dollars

- H.01L Support Kit - $162.00 (Includes probe, probe shield, battery,
  panel knobs, wrenches, and cleaning brush.
- Other lengths and materials available on request
- Click Here if you need to order a replacement tape and probe.
- Click Here for other Heron replacement parts.

- Click Here if you need to return a Heron Instrument for repairs.
- Click here for a printable Product Brochure.




      U.S. (48 Contiguous States):

Free Ground Shipping ($25 for 2nd day air and $50 for next day air)

All other Destinations:

Please request a quote

We use Fedex, UPS, USPS, and DHL currier services.


      Our PayPal gateway is a secure online ordering system that permit payments to be transmitted in a safe environment.   We accept orders and payments by several modes indicated by the Pay and Order buttons below.   If you have additional questions about items, ordering, or shipping, do not hesitate to contact us.

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  • USA:   Standard shipping for orders to locations within the 48 contiguous United States is by ground parcel service.   If more rapid delivery is required, please enquire about availability of the resource and possibility of shipment by 2nd day (additional $25) or next day (additional $50) air.
  • Hawaii, Alaska, Canada, and Mexico:   Standard shipping for orders to these destinations is by UPS.   Costs vary.   Please request a quote..
  • All Other International Destinations:   Standard shipping for orders to all other international destinations is by international air currier.   Long-air shipment is expensive and can vary widely.   Please request a shipping quote to your location.   If you provide us with your City, Country and Postal Code (where applicable) we will furnish you with a specific cost for shipment to your location.   Also a telephone number for the shipping address is required by international curriers.   

Prices and shipping charges are subject to change without notice.



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