HDI sensors from Sensortechnics Inc., Walpole, MA, measure absolute, differential, or gauge pressures in ranges from 10 mbar up to 5 bar (4 in.H2O to 150 psi) and are suitable for use in portable or handheld devices. Features include 3 V supply versions, total error band better than ±0.5% F.S. over a 0°C–85°C temperature range, I2C interface, and analog 0.5–4.5 V output signals. Sensors are for use with air and noncorrosive gases and offer various unidirectional, bidirectional, or barometric calibrations and different accuracy classes. Applications include medical devices, instrumentation, environmental controls, and HVAC.