FIELDPIECE

hand-held, stick and clamp meters, sensor heads, and probes for use in measuring environmental parameters, namely, humidity, relative humidity, temperature, pressure, differential pressure, oxygen concentration, carbon dioxide concentration, carbon monoxide concentration and air velocity, as well as electrical parameters, namely, current, voltage, capacitance, impedance, frequency, and phase; weighing equipment namely scales and balances; leak detectors for vacuum pumps; and downloadable software for connecting, operating and managing networked meters, manifolds, pumps, compressors and sensors for HVAC systems in the internet of things (IoT), also software for enabling communication between a mobile device and an HVAC instrument.