Performance Results Plus Inc. products

The USGS Pygmy Current Meter, at two-fifths the size of the standard Type AA current meter, is specifically designed for measuring shallow streams using a wading rod. It does not include a tailfin assembly. This instrument operates within a range of 0.1 to 4.9 feet per second (0.03 to 1.5 meters per second). The 2-inch diameter bucket wheel features six cups, and each full revolution of the wheel triggers a single contact closure. The pygmy meter package includes a carrying case, a USGS standard rating table available in either English or metric units, spare parts, a screwdriver, instrument oil, and a cleaning cloth. These components ensure the meter is well-maintained and ready for accurate hydrological measurements in field conditions.

The Elwha River Sediment Sampler, known by its model number US-ER1, is a precision-engineered bedload sampler specifically designed for hydrological studies. Weighing 52 pounds (23.6 kg), it is a cable-suspended apparatus with a 4 inch by 8 inch inlet nozzle and a 1.4 expansion ratio. Constructed from a quarter-inch aluminum plate, it is robust yet lightweight compared to its heavier counterpart, the Toutle River Sampler, US-TR-2, which weighs 180 pounds. The US-ER1 sampler comes equipped with its own sediment bag, making it a comprehensive tool for sediment collection and analysis. For those requiring heavier equipment, an alternative heavier version of the Elwha Sampler is available on special order. This sampler is ideal for a range of applications demanding precision and durability in sediment collection from riverine environments.

The USGS Type AA current meter, often referred to as the Price-type current meter, is designed for precise streamflow measurement. It is deployed in water using either a cable with sounding weight or a wading rod, accurately measuring velocities from 0.1 to 25 feet per second (0.025 to 7.6 meters per second). The meter features a uniquely designed bucket wheel with six conical cups rotating on a vertical axis, coupled with tungsten carbide bearings that exclude water and silt, minimizing friction. The contact chamber includes a penta gear and platinum alloy contact wires for signal transmission during varying flow speeds. Each unit comes with a USGS-approved rating table, spare parts, instrument oil, and a water-tight case that floats, ensuring safe transportation and storage. Constructed from brass and stainless steel with corrosion-resistant plating, the Type AA is compatible with counters and the AquaCalc 5000 Digital Flow Computer, requiring no additional conversion kits.

These heavy-duty Keson tapes are designed for durability and accuracy. The tape features a nylon coating that protects against wear and withstands extreme temperatures, water, and chemicals. It includes wear-resistant graduations and a high-tempered steel tape core for flexibility. The open reel is made of impact-resistant ABS plastic and comes with a chrome-plated handle with a metal insert. The zipline reel offers a 3 to 1 rewind ratio, and the crank handle folds flat for easy storage. Measurement starts at the end of the hook, ensuring precise results in various field conditions.