IOThrifty Blog

Learn how to wire a pressure transducer with a DIN connector in this step-by-step tutorial using the NP400 and NP640 models. We show how to remove the DIN connector, access the screw terminals, and correctly connect power and signal wires for two-wire 4–20 mA transmitters. Perfect for anyone setting up pressure sensors in industrial automation, HVAC, or fluid control systems.

Explore the origins of pressure units like psi, bar, and Pascal, and learn how to convert between English and metric systems. This article explains why pressure units differ globally, how the Pascal became the SI standard, and how units like psi, bar, and kg/cm² relate. Includes a free pressure conversion spreadsheet to help convert between psi and bar for 4–20 mA transmitters and industrial instrumentation setups. Ideal for engineers, technicians, and anyone working with pressure sensors or transmitters.

Pressure transducers are essential for measuring gas and liquid pressure in industrial systems ranging from hydraulic equipment and process air to barometric and vacuum applications. This guide explains the types of pressure—gauge, absolute, and sealed gauge—as well as key considerations when selecting a pressure transducer, including input/output specs, wetted parts, temperature compensation, overpressure limits, and compatibility with hazardous or specialty gases like oxygen and helium. Learn the differences between sensors, transducers, and transmitters, and how modern strain gauge technology has replaced traditional Bourdon tubes for accurate, rugged pressure measurement.