Performance Results Plus, Inc. manufactures and distributes hydrological instrumentation built to U.S. Geological Survey designs and standards, including equipment for accurate water measurement and sediment sampling. Based in Columbus, the company has produced USGS hydrologic instrumentation for more than 100 years and also offers custom-designed equipment through its engineering staff. Its factory-authorized service operation evaluates, repairs, calibrates, and certifies instruments to help preserve measurement accuracy.
Gurley Precision Instruments, IncFounded in 1845, Troy-based Gurley Precision Instruments makes measurement equipment spanning optical encoders, precision optics, materials-testing instruments and open-channel flow meters. Its hydrological work dates to 1885, while its Genuine Gurley paper-testing instruments have been made since 1923, giving the company an unusually deep history in specialized measurement. Gurley is ISO 9001:2015 certified and continues to develop custom equipment for OEM, industrial, military and aerospace applications.TROY, NY
femto-TECH, INCKnown in radiation measurement since 1986, femto-TECH, INC. is a Carlisle, Ohio manufacturer whose U.S.-made instruments have become fixtures in professional and government testing. The company’s long-lived equipment is still sent back for calibration decades after manufacture, while its staff also develops specialized monitoring systems for national laboratories and nuclear-reactor applications.FRANKLIN, OH
FLO-CORPSince its Ohio incorporation in 1989, privately held, family-owned FLO-CORP has grown from a small distributor into a designer, builder and manufacturer of flow, level and process-monitoring equipment. The company configures and calibrates customized systems for demanding industrial operations, including its CONNEX 3D™ platform for local and remote process visibility. FLO-CORP also provides ISO 17025-compliant calibration services and backs its products with a five-year warranty.MEDINA, OH