RT9420

0–90° to 0–50 Turns • 0..20mA • 4..20mA
Industrial Grade Rotational Position Sensor
Absolute Rotary Position up to 50 turns
Aluminum or Stainless Steel Enclosure Options
IP68 / NEMA 6 • Hazardous Area Certification

GENERAL
Full Stroke Range Optionst

0-0.25 to 0-50 turns

Output Signal Optionst

4...20 mA (2-wire) and 0...20 mA (3-wire)

Accuracyt

see ordering information

Repeatabilityt

± 0.05% full stroke

Resolutiont

essentially infinite

Enclosure Material Optionst powder-painted aluminum or stainless steel
Sensort

plastic-hybrid precision potentiometer

Potentiometer Cycle Life t

see ordering information

Shaft Loadingt

up to 35 lbs. radial and 5 lbs. axial

Weight, Aluminum (Stainless Steel) Enclosuret

5 lbs. (10 lbs.) max.

ELECTRICAL
Input Voltaget

see ordering information

Input Currentt

20 mA max.

Maximum Loop Resitance (Load)t

(loop supply voltage - 8)/0.020

Circuit Protectiont

38 mA max.

Impedencet

100M ohms@100 VDC, min.

Output Signal Adjustment
Zero Adjustmentt

from factory set zero to 50% of full stroke range

Span Adjustmentt

4.5” [114 mm]

2.4” [59 mm]

The RT9420 provides rotational position feedback via 4...20
mA current loop signal. This device combines the superb
linearity and resolution of a plastic-hybrid potentiometer
and the durability of Celesco’s 4...20mA circuit to provide
an accurate and reliable electrical signal. Additionally the
zero and span settings are adjustable through access holes
in the housing.
This innovative sensor from Celesco, designed to meet
NEMA-4 and IP67 standards, is available in full stroke ranges of 1/4 to 50 turns.

to 50% of factory set span

Thermal Effects, Zerot

0.01% f.s./ºF, max.

Thermal Effects, Spant

Output Signal:

0.01% f.s./ºF, max.

4...20 mA*

EMC COMPLIENCE PER DIRECTIVE 89/336/EEC
Emission/Immunityt

EN50081-2/EN50082-2

(0% fs.)

(100% fs.)

ENVIRONMENTAL
Enclosuret
Operating Temperaturet
Vibrationt

NEMA 4/4X/6, IP 67/68
-40° to 200°F (-40° to 90°C)

*Optional 3-wire, 0...20mA output signal available.

up to 10 g to 2000 Hz maximum

20630 Plummer Street  •  Chatsworth, CA 91311
tel: 800.423.5483 • +1.818.701.2750 • fax: +1.818.701.2799
celesco.com • info@celesco.com

RT9420  | 1