A 4-20mA pressure transducer is a type that outputs an electrical current signal. Here's the cool part: the current changes based on the pressure. So, if there's no pressure, it sends out a 4mA signal. And if it's at full pressure, you get a 20mA signal. Anything in between gets a proportional current value. It's a popular choice because this format can be less susceptible to electrical interference, making it reliable even in noisy industrial environments.