The RT9420 has a sealed design which meets NEMA 4 standards, protecting its sensing element from dust, moisture, hydraulic fluid and other environmental elements. Its 4-20mA feedback signal enables data aquisition over long distances while resisting electromagnetic interference. And since the sensor is potentiometric, it maintains "absolute" position information even if power is lost.

The RT9420 takes only minutes to install and adjust to specific full-scale ranges. Simply mount its housing to a reference surface and connect its rotational shaft to the rotating element to be sensed.

Configurable for full-stroke ranges of 0.25 to 50 turns (90 to 18,000 degrees), the RT9420 is extremely accurate. For full scale ranges of less than 5 turns, its accuracy is +/- 0.3% of full scale. Higher turn units are accurate to +/- 0.15% of full scale. All ranges have essentially infinite resolution. Both transducer zero and span settings are adjustable through access holes in the housing.

The RT9420's sealed design, 4-20mA output current and 38mA circuit protection make it ideal for use in hydro-electric plants, factories, outdoors and applications requireing the monitoring or aquisition of rotational position data in harsh environments.

The RT9420 is a member of Celesco's complete family of industrial-grade transducers which are available in a variety of measurement ranges and mechanical and electrical options. For applications requiring linear position feedback, Celesco offers the PT8000 and PT9000 series. All of these industrial-grade transducers have a sealed cylindrical housing based on NEMA 4 standards.

Celesco, headquartered in Canoga Park, California, designs, manufactures and markets a wide range of transducers and related precision instruments. The company is the world's largest supplier of cable-extension position transducers which are used to detect and measure linear position and velocity. Its other families of transducers are used for measuring rotational position and differential pressure. Celesco also manufactures thermocouple reference junctions. OEMs and end users choose Celesco transducers because of their high accuracy, resolution, and repeatability. The company, founded in 1968, is a wholly owned subsidiary of Tedea, Ltd.