Skip Links

USGS - science for a changing world

Open-File Report 2013–1173

Laboratory Evaluation of the Level TROLL 100 Manufactured by In-Situ Inc.—Results of Pressure and Temperature Tests

By Mark V. Carnley, Janice M. Fulford, and Myron H. Brooks

Thumbnail of report PDF 1.14 MB)

Abstract

The Level TROLL 100 manufactured by In-Situ Inc. was evaluated by the U.S. Geological Survey (USGS) Hydrologic Instrumentation Facility (HIF) for conformance to the manufacturer’s accuracy specifications for measuring pressure throughout the device’s operating temperature range. The Level TROLL 100 is a submersible, sealed, water-level sensing device with an operating pressure range equivalent to 0 to 30 feet of water over a temperature range of −20 to 50 degrees Celsius (°C). The device met the manufacturer’s stated accuracy specifications for pressure within its temperature-compensated operating range of 0 to 50 °C. The device’s accuracy specifications did not meet established USGS requirements for primary water-stage sensors used in the operation of streamgages, but the Level TROLL 100 may be suitable for other hydrologic data-collection applications. As a note, the Level TROLL 100 is not designed to meet USGS accuracy requirements. Manufacturer accuracy specifications were evaluated, and the procedures followed and the results obtained are described in this report. USGS accuracy requirements are routinely examined and reported when instruments are evaluated at the HIF.

First posted September 25, 2013

For additional information contact:
Chief, Hydrologic Instrumentation Facility
U.S. Geological Survey
Building 2101, Room 154
Stennis Space Center, MS 39529
http://water.usgs.gov/hif//

Part or all of this report is presented in Portable Document Format (PDF); the latest version of Adobe Reader or similar software is required to view it. Download the latest version of Adobe Reader, free of charge.


Suggested citation:

Carnley, M.V., Fulford, J.M., and Brooks, M.H., 2013, Laboratory evaluation of the Level TROLL 100 manufactured by In-Situ Inc.—Results of pressure and temperature tests: U.S. Geological Survey Open-File Report 2013–1173, 12 p., http://pubs.usgs.gov/of/2013/1173/.



Contents

Abstract

Introduction

Description of the Level TROLL 100

Methods

Measurement Units and Conventions for Pressure

Results

Summary

References Cited


Accessibility FOIA Privacy Policies and Notices

USA.gov logo U.S. Department of the Interior | U.S. Geological Survey
URL: https://pubs.usgs.gov/of/2013/1173/
Page Contact Information: Contact USGS
Page Last Modified: Wednesday, September 25, 2013, 02:50:02 PM