Celesco RT9420 · Absolute Rotary Position Sensor · 4–20 mA / 0–20 mA current output · 0.125–50 turns
The Celesco RT9420 (rotary version of the PT9420) uses the same structure: RT9420 – RRRR – A B C – D E F G, where the range code gives full turns of the shaft. Example: RT9420-0005-111-1110 = 5-turn range, aluminum enclosure, Ø.25 in shaft, 4–20 mA output increasing clockwise, 6-pin connector.
RT9420–0005–111–1110ModelRangeOptionsSignal / Connection
Order Code Table
R · Full Stroke Range (clockwise shaft rotations)
| Code | Meaning |
|---|
| R125 | 0.125 turns (accuracy 0.3%) |
| 0R25 | 0.25 turns (0.3%) |
| 0R50 | 0.50 turns (0.3%) |
| 0001 | 1 turn (0.3%) |
| 0002 | 2 turns (0.3%) |
| 0003 | 3 turns (0.3%) |
| 0005 | 5 turns (0.2%) |
| 0010 | 10 turns (0.15%) |
| 0020 | 20 turns (0.15%) |
| 0030 | 30 turns (0.15%) |
| 0050 | 50 turns (0.15%) |
A · Enclosure Material
| Code | Meaning |
|---|
| 1 | Powder-painted aluminum |
| 2 | 303 stainless steel |
B · Shaft Diameter
| Code | Meaning |
|---|
| 1 | 0.25 in. diameter (Ø.2497 in.) |
| 2 | 6 mm diameter (Ø5.995 mm) |
| 3 | 0.25 in. diameter with flats |
| 4 | 6 mm diameter with flats |
C · Reserved
| Code | Meaning |
|---|
| 1 | Fixed digit (reserved position) |
D · Reserved
| Code | Meaning |
|---|
| 1 | Fixed digit (reserved position) |
E · Output Signal
| Code | Meaning |
|---|
| 1 | 4…20 mA, 2-wire, increasing clockwise (8–34 VDC) |
| 2 | 20…4 mA, 2-wire (8–34 VDC) |
| 3 | 0…20 mA, 3-wire (14–29 VDC) |
| 4 | 20…0 mA, 3-wire (14–29 VDC) |
| 5 | 4…20 mA, 2-wire, intrinsically safe (CSA / Cenelec) |
| 6 | 20…4 mA, 2-wire, intrinsically safe (CSA / Cenelec) |
F · Electrical Connection
| Code | Meaning |
|---|
| 1 | 6-pin plastic connector with mating plug — IP67, NEMA 4X/6 |
| 2 | 10 ft. [3 m] waterproof cable — IP67, NEMA 4X/6 |
| 3 | 6-pin metal connector with mating plug — IP65, NEMA 4 |
| 4 | 25 ft. [7.5 m] instrumentation cable, 24 AWG shielded — IP67, NEMA 4X/6 |
| 5 | 100 ft. [30 m] waterproof cable — IP67, NEMA 4X/6 |
| 6 | 10 ft. [3 m] pressure-tested waterproof cable — IP68, NEMA 4X/6P |
| 7 | 100 ft. [30 m] pressure-tested waterproof cable — IP68, NEMA 4X/6P |
G · Reserved
| Code | Meaning |
|---|
| 0 | Fixed digit (reserved position) |
Special Options & Notes
- RT9420 range codes use R as a decimal point: R125 = 0.125 turns, 0R25 = 0.25 turns, 0R50 = 0.5 turns.
Frequently Asked Questions
What does RT9420-0005-111-1110 mean?
A Celesco RT9420 rotary position sensor with a 5-turn range (0005), powder-painted aluminum enclosure (1), 0.25 in. plain shaft (1), 4–20 mA output increasing clockwise (1) and a 6-pin plastic connector with mating plug (1). The digits C, D and the final 0 are fixed reserved positions.
What is the difference between RT9420 and PT9420?
The PT9420 measures linear movement with a retractable cable (75–550 in. stroke). The RT9420 measures rotation: its shaft accepts up to 50 turns (0.125–50 turns) with the same 4–20 mA electronics, enclosure and connector options.
Which RT9420 range has the best accuracy?
Ranges of 10 turns and above (codes 0010, 0020, 0030, 0050) are specified at ±0.15% of full stroke; 5-turn is ±0.2%; ranges up to 3 turns are ±0.3%.
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