PT8420
Cable Actuated Sensor
Industrial • 4..20 mA • 0..20mA
Absolute Linear Position to 60 inches (1524 mm)
Aluminum or Stainless Steel Enclosure Options
VLS Option to Prevent Free-Release Damage
IP68 / NEMA 6 • Hazardous Area Certification
GENERAL
Full Stroke Range Options
Output Signal Options
Accuracy
Repeatability
Resolution
Measuring Cable Options
Enclosure Material
Sensor
Potentiometer Cycle Life
Max. Retraction Acceleration
0-2 to 0-60 inches
4...20 mA (2-wire) and
0...20 mA (3-wire)
see ordering information
± 0.05% full stroke
essentially infinite
stainless steel or thermoplastic
powder-painted aluminum or stainless
steel
plastic-hybrid precision potentiometer
see ordering information
see ordering information
3.6” [91 mm]
5.6” [141 mm]
The PT8420 with its 4-20 mA feedback signal,
is ideal for monitoring the stroke of a hydraulic
cylinder and other applications requiring po-
sition data acquistion in harsh environments.
As a member of our family of NEMA 4-rat-
ed cable-extension transducers, the PT8420
provides a feedback signal that is proportional
to the linear movement of a traveling stain-
less-steel extension cable. Simply mount the
body of the transducer to a fixed surface and
attach the extension cable to the moving ob-
ject.
Output Signal
ELECTRICAL
Input Voltage
Input Current
Max. Loop Resistance (Load)
Circuit Protection
Impedance
Signal Adjust, Zero
Signal Adjust, Span
Thermal Effects, Zero
Thermal Effects, Span
see ordering information
20 mA max.
(loop supply voltage - 8)/0.020
38 mA max.
100M ohms@100 VDC, min.
from factory set zero to 50% of full stroke
range
to 50% of factory set span
0.01% f.s./°F, max.
0.01% f.s./°F, max.
4.
(0% fs.)
*
0 mA
..2
(100% fs.)
ENVIRONMENTAL
Enclosure
Hazardous Area Certification
Operating Temperature
Vibration
Weight, Aluminum Enclosure
Weight, Stainless Steel Encl.
NEMA 4/4X/6, IP 67/68
see ordering information
-40° to 200°F (-40° to 90°C)
up to 10 g’s to 2000 Hz maximum
3 lbs. max.
6 lbs. max.
cable extension
spring loaded
cable reel
*Optional 3-wire, 0...20mA output signal available.
SENSOR SOLUTIONS
/// PT8420
PAGE 1
PT8420
Industrial • 4–20mA / 0–20mA Output Signal
Outline Drawing:
see eyelet detail
A
eyelet detail
Ø.191
[4,19]*
Ø.375
[9,52]**
.165 [4,19]**
0.99 [25,1]
1.80 [45,7]
0.08 [2,0]
3.50 [88,9]
1.50 [37,6]
2.49 [63,3]
3.60 [91,4]
RANGE
2”, 10”
5”, 25”, 50”
15”
20”, 40”
30”, 60”
1.30 [33,3]
5.56 [141,2] max.
A
0.60 [15,2]
1.16 [29,5]
0.66 [16,8]
0.99 [25,7]
0.85 [21,6]
0.52 [13,3]
3.00 [76,2]
DIMENSIONS ARE IN INCHES [MM]
tolerances are ±0.02 in. [±0,5 mm] unless otherwise noted
note: *tolerance = +.005 –.001 [+.13 –.03]
**tolerance = +.005 –.005 [+.13 –.13]
Ø.27
[6,8] thru
(4 places)
1.64 [41,6]
Ordering Information:
Model Number:
Sample Model Number:
PT8420
-
order code:
PT8420 - 0030 - 111 - 1110
R
-
A
B
1 - 1
C
D
0015
E
F
G
Full Stroke Range:
R
order code:
full stroke range, min:
accuracy (% of f.s.):
potentiometer cycle life*:
R
A
B
E
F
G
range:
enclosure/cable tension:
measuring cable:
output signal:
electrical connection:
cable guide option:
30 inches
aluminum/standard (13 oz.)
.034 nylon-coated stainless
4...20mA, 2-wire
6-pin plastic connector
standard nylon cable guide
2 in.
1.00%
2.5 x 106
0002
5 in.
1.00%
2.5 x 106
0005
10 in.
0.18%
5 x 105
0010
15 in.
0.18%
5 x 105
20 in.
0.18%
5 x 105
0020
25 in.
0.18%
5 x 105
0025
30 in.
0.18%
5 x 105
0030
40 in.
0.15%
2.5 x 105
0040
50 in.
0.15%
2.5 x 105
0050
60 in.
0.15%
2.5 x 105
0060
*–1 cycle is defined as the travel of the measuring cable from full retraction to full extension and back to full retraction
Enclosure Material and Measuring CableTension:
A
order code:
enclosure:
cable tension:
max. acceleration:
1
5
2
3
6
303 stainless
medium
12 g
15 in.
26 oz.
43 oz.
77 oz.
20 in.
20 oz.
33 oz.
60 oz.
4
high
18 g
25 in.
16 oz.
26 oz.
47 oz.
8
standard
6g
30 in.
13 oz.
22 oz.
40 oz.
7
316 stainless
medium
12 g
40 in.
20 oz.
33 oz.
60 oz.
50 in.
16 oz.
26 oz.
47 oz.
9
high
18 g
60 in.
13 oz.
22 oz.
40 oz.
aluminum
standard
15 g
Range:
Standard:
Medium:
High:
medium
25 g
2 in.
39 oz.
65 oz.
116 oz.
high
40 g
5 in.
16 oz.
26 oz.
47 oz.
standard
6g
10 in.
39 oz.
65 oz.
116 oz.
cable tension option
specifications
tension tolerance: ± 50%
SENSOR SOLUTIONS
/// PT8420
PAGE 2
PT8420
Industrial • 4–20mA / 0–20mA Output Signal
Ordering Information (cont.):
Measuring Cable:
B
order code:
cable construction:
available ranges:
general use:
1
Ø.034-inch
nylon-coated
stainless steel rope
all ranges
indoor
2
Ø.047-inch
bare
stainless steel rope
5, 15, 20, 25, 30-inch only
outdoor, debris,
high temperature
3
Ø.058-inch
PVC jacketed
vectra fiber rope
thru 30 inches only
high voltage or
magnetic field
4
Ø.031-inch
bare
stainless steel rope
40, 50, 60-inch only
outdoor, debris,
high temperature
Output Signals:
E
order code:
output signal options:
4
4...20 mA
20
1
20...4 mA
20
4
2
0...20 mA
0
20
3
20...0 mA
20
0
4
4...20 mA
4
20
5*
20...4 mA
20
4
6*
sensitivity:
wiring configuration:
input voltage:
hazardous area certification:
Example:
16 mA/full stroke ±0.25%
2 – wire
8 – 34 vdc
20 mA/full stroke ±0.25%
3 – wire
14 – 29 vdc
ordercode =
1
= 4...20 mA
{
not certified
16 mA/full stroke ±0.25%
2 – wire
14 – 32 vdc
CSA
Hazardous Area Certi cation:
R
= 4 mA
= 20 mA
CSA Standard 22.2
Class 1
Groups A, B, C and D
*IMPORTANT:
intrinsically safe when powered from a CSA certi ed zener barrier rated 28 VDC max, 110 mA max per installation drawing#677984
Electrical Connection:
F
order code:
1
2
10-ft. [3 M]
waterproof cable
IP 67, NEMA 4X**, 6
3
6-pin metal connector
w/mating plug
IP 65, NEMA 4
2.4 in.
[60 mm]
4
25-ft. [7.5 M]
instrumentation cable
IP 67, NEMA 6
6-pin plastic connector
w/mating plug
IP 67, NEMA 4X**,6
3.0 in.
[78 mm]
1/2 - 5/16" [14 - 8 mm] cable dia.
16 AWG max conductor size
connector: MS3102E-14S-6P
mating plug: MS3106E-14S-6S
10 ft. x 0.4-in. dia.
[3 M x 10 mm dia.]
3-conductor, 18 AWG
type SJTOW
3/8-in. [9 mm] max cable dia.
16 AWG max conductor size
connector: MS3102E-14S-6P
mating plug: MS3106E-14S-6S
25 ft. x 0.2-in. [7,5 M x 5 mm] dia.
6-conductor, 24 AWG
shielded
F
order code:
5
100-ft. [30 M]
waterproof cable
IP 67, NEMA 4X**,6
6
10-ft. [3 M]
pressure tested*
waterproof cable
IP 68, NEMA 4X**, 6P
7
100-ft. [30 M]
pressure tested*
waterproof cable
IP 68, NEMA 4X**, 6P
100 ft. x 0.4-in. dia.
[30 M x 10 mm dia.]
18 AWG, type SJTOW
10 ft. x 0.4-in. dia.
[3 M x 10 mm dia.]
3-conductor, 18 AWG
type SJTOW
100 ft. x 0.4-in. dia.
[30 M x 10 mm dia.]
3-conductor, 18 AWG
type SJTOW
6-pin Mating Plug
pin
A
B
C
D
2-wire
8...34 vdc***
4...20 mA out
–
case ground
3-wire
14...29 vdc
common
0...20 mA out
–
A
B
C
D
F
E
Waterproof Cable
color code
2-wire
WHITE
8...34 vdc***
BLACK
4...20 mA out
GREEN
case ground
3-wire
14...29 vdc
common
0...20 mA out
Instrumentation Cable
color code
2-wire
3-wire
RED
8...34 vdc***
14...29 vdc
BLACK
4...20 mA out
common
GREEN
case ground 0...20 mA out
Note: WHITE, BLUE, BROWN are not used.
contact view
*–Test pressure: 100 feet [30 meters] H2O (40 PSID) Test Medium: Air; Duration: 2 hours. ** –applies to stainless steel enclosure only. ***14-32 VDC for hazardous area option.
SENSOR SOLUTIONS
/// PT8420
PAGE 3
PT8420
Industrial • 4–20mA / 0–20mA Output Signal
Ordering Information (cont.):
Cable Guide Options:
G
order code:
0
1
stainless steel cable guide
2*
polyurethane cable bellows
3
integral cable brush
standard cable guide
1.87 in.
1.87 in.
3.75 in.
*note: all ranges up to 25 inches only
Output Signal Selection:
The output signal direction can
be reversed at any time by
simply changing the dip-switch
settings found on the internal
signal board. After the settings
have been changed, adjust-
ment of the Zero and Span
trimpots will be required to
precisely match signal values to
the beginning and end points
of the stroke.
output signal
0...20 mA
or
4...20 mA
switch setting
1 2 3 4
signal board
internal dip switches
& signal board
20...0 mA
or
20...4 mA
1 2 3 4
1 2 3 4
dip-switch location
To gain access to the signal board,
remove four Allen-Head Screws and
remove rear cover.
1.88 in.
SENSOR SOLUTIONS
/// PT8420
PAGE 4
VLS Option
- Free Release Protection
The patented Celesco Velocity Limiting System
(VLS) is an option for PT8000 Series cable ex-
tension transducers that limits cable retraction
to a safe 40 to 55 inches per second.
The VLS option prevents the measuring cable
from ever reaching a damaging velocity during
an accidental free release. This option is ideal
for mobile applications that require frequent ca-
ble disconnection and reconnection. It prevents
expensive unscheduled downtime due to acci-
dental cable mishandling or attachment failure.
VLS is NOT available for medium and high ca-
ble tension options, stainless steel enclosure,
cable bellows or 2, 5 and 15-inch stroke rang-
es.
How To Configure Model Number for VLS Option:
VLS8420
-
R
- 1
A
B
1 - 1
C
D
E
F
G
0015
0020
0025
0030
0040
0050
0060
= available options**
creating VLS model number (example):
1. select PT8420 model
2. remove “PT” from the model number
3. add “VLS”
4. completed model number !
1
2
3
4
1
2
3
4
5
6
1
2
3
4
5
6
7
0
1
3
PT8420-0060-111-1110
PT
8420-0060-111-1110
VLS + 8420-0060-111-1110
VLS8420-0060-111-1110
**Note: please contact factory for a solution to options not supported.
NORTH AMERICA
Measurement Specialties, Inc.
a TE Connectivity Company
20630 Plummer Street
Chatsworth, CA 91311
Tel +1-800-423-5483
Tel +1-818-701-2772
Fax +1-800-701-2799
customercare.chtw@te.com
te.com/sensorsolutions
Measurement Specialties Inc. a TE Connectivity company
Measurement Specialties, TE Connectivity, TE Connectivity (logo) and Every Connection Counts are trademarks. All other logos, products and/
or company names referred to herein might be trademarks of their respective owners.
The information given herein, including drawings, illustrations and schematics which are intended for illustration purposes only, is believed to
be reliable. However, TE Connectivity makes no warranties as to its accuracy or completeness and disclaims any liability in connection with its
use. TE Connectivity‘s obligations shall only be as set forth in TE Connectivity‘s Standard Terms and Conditions of Sale for this product and in
no case will TE Connectivity be liable for any incidental, indirect or consequential damages arising out of the sale, resale, use or misuse of the
product. Users of TE Connectivity products should make their own evaluation to determine the suitability of each such product for the specific
application.
© 2016 TE Connectivity Ltd. family of companies All Rights Reserved.
SENSOR SOLUTIONS
/// PT8420
version: 13.0 // January 10, 2017
PAGE 5
