PA420

Liquid level preamplifier and transmitter

A two-wire, loop-powered 4–20 mA liquid level preamplifier and transmitter.

Country of origin
United Kingdom

Product Description

Because "PA420" refers to different technical products depending on the manufacturer, it most commonly describes the Spirax Sarco PA420 Preamplifier, a loop-powered 4–20 mA level transmitter used with capacitance probes in industrial boilers and tanks. Alternative meanings include a digital mini clamp meter, a process indicator, or a state relay.

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