Spectra Scientific | Professional Grade Groundwater Monitoring
The Heron H.OIL Oil/Water Interface Probe is a slim, intrinsically safe field instrument designed to accurately detect and measure the thickness of floating or sinking product layers (LNAPL and DNAPL) in groundwater wells, tanks, and remediation sites. Featuring a rugged stainless-steel probe (5/8″ diameter) and a premium Kynar® coated tape, the meter provides reliable readings even in harsh environments. Its advanced optical sensor distinguishes between hydrocarbons and water to within 1 mm, with both audible and visual alerts for precision. Built for long-term durability, the H.OIL is certified to ATEX, IECEx, CSA, and UL standards for safe use in hazardous locations. Complete with a waterproof reel, ergonomic grip, and field accessories, the Heron Interface Probe is the trusted solution for environmental monitoring, spill response, and site remediation projects.
The Spectra Field Pro III offers decades of durability, with early models still running on minimal maintenance.
The Spectra Field Pro combines all essentials into one compact unit, eliminating bulky battery packs for ultimate convenience.
We’re with you every step of the way. Spectra's lifetime support ensures you’re never without expert guidance or reliable assistance.
Our Professional Grade products are built to last, so we hope you’ll only contact us for support or training.




At Spectra Scientific we stand behind our products through a system of world class design, manufacturing and customer support. We are not satisfied until you are satisfied.
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Nicholas M2024-03-15Trustindex verifies that the original source of the review is Google. In the past few years, Spectra has always been my go to for all my environmental equipment needs, the folks are always willing to assist and/or provide me the best possible solution for challenges I may face on field trips with reliable equipment and knowledgable employees who can provide realtime support when needed. 10/10 would recommend. Osman A2023-08-04Trustindex verifies that the original source of the review is Google. Very professional and excellent service Kerby T2023-01-06Trustindex verifies that the original source of the review is Google. Very friendly and amazing staff that will always assist you in any way they can! They are never late when it comes to orders. Their service is as good as it getsGoogle rating score: 5.0 of 5, based on 23 reviews