Jetperch LLC is the Maryland company behind the Joulescope name, known for making accessible precision energy analyzers for engineers developing battery-powered and always-on electronics. Its instruments help teams understand how embedded hardware and software affect energy use, with open-source computer software supporting analysis and automation.
ISO 17025:2017 NIST-traceable calibration
USB 2.0 inrush and suspend current pre-compliance testing
Compliance program
Landt InstrumentsFor more than 20 years, Landt Instruments has made precision battery-test systems and related lab supplies for energy-storage researchers and manufacturers. Its testers run across universities, national laboratories and major battery companies worldwide, with custom configurations spanning small research cells through battery modules and packs. Landt also pairs the equipment with purpose-built software and practical accessories, including four-wire clips for Kelvin testing.VESTAL, NY
BatteryDAQ LLCFounded in 2007 by engineers rooted in industrial data acquisition, Maryland-based BatteryDAQ LLC designs and manufactures battery monitoring systems for critical power operations. Its Sentry hardware and MyBattery platform provide utility, telecom, and industrial operators with continuous battery-health data, including systems built for NERC PRC-005 compliance. With more than 10,000 units deployed across 20-plus countries, the company supports large distributed fleets while providing direct engineering assistance from its U.S. operation.TOWSON, MD
Core Technology GroupFounded by principal engineer John F. Iannuzzi, Core Technology Group develops electronic test instruments and provides design engineering from its Chalfont, Pennsylvania facility. The company is best known for its Circuit Sleuth frequency-response analyzers, supported by signal-conditioning hardware, software tools and consulting for projects ranging from power-supply testing to aerospace and military systems.CHALFONT, PA
AYA Instruments, IncSince 1990, Pittsburgh-based AYA Instruments has supplied measurement and monitoring equipment for conventional and alternative electrical energy, serving customers in fields from solar to semiconductor and process control. Alongside its standard instruments, the company develops customized measurement and signal-conditioning solutions and provides integrated energy systems through industry partners. AYA also brings that expertise into the classroom through its Energy Discovery Zone projects, including a solar power and weather-station installation at Fort Cherry schools.PITTSBURGH, PA