P138 Slim-line Mid Stroke Linear Sensor

Position feedback for industrial and scientific applications

Linear

This sensor at a glance

Available in any measurement range from 0-51mm to 0-100mm
(for 2-50mm range see P118)

Longer operating life than a potentiometer

Fast delivery options available

Body Diameter: 19mm

Sensor Mounting: Flange or body clamps

Spring loaded pushrod option available

Sealed to IP67

Independent Linearity:
< ±0.25%
< ±0.10% option available

Resolution: Infinite

Temperature range: -40° to +125°C (depending on electronics version)

P138  is an affordable, durable, accurate position sensor designed for a wide range of industrial applications. It is particularly suitable for OEMs seeking good sensor performance in situations where a small diameter, short-bodied sensor is needed and cost is important. The unit is compact and space-efficient, being responsive along almost its entire length, and like all Positek® sensors provides a linear output proportional to displacement.

Each unit is supplied with the output calibrated to the travel required by the customer, from 0-51mm to 0-100mm and with full EMC protection built in.

Overall performance, repeatability and stability are outstanding over a wide temperature range. The sensor has a compact 19 mm diameter stainless steel body, is easy to install and set up. Mounting options include body clamps or a stainless steel mounting flange with two 3.2 mm by 30 degree wide slots on a 25 mm pitch. The stainless steel plunger can be supplied free or captive, with female M4 thread, or spring-loaded with a ball end. The P138 also offers a range of mechanical options, environmental sealing is to IP67.

Dimensions

Body Diameter
19mm
Travel
Any stroke from 0-51mm to 0-100mm (e.g. 76mm)
Independent Linearity
<±0.25% at 20°C
<±0.1% available on request
Temperature Coefficient
<±0.01%/°C Gain & <±0.01%FS/°C Offset
Resolution
Infinite
Noise

<0.02% FSO

Frequency Response

>10KHz (-3dB)


Output Signal and Output Load

Output Signal
Output Load
0.5 to 4.5 V DC ratiometric
5k Ohms min
0.5 to 4.5 V DC
5k Ohms min
0.5 to 9.5 V DC ratiometric
5k Ohms min
4 to 20mA300 Ohms max
Supply Current
10 mA Typical 20 mA max + O/P Current


Temperature Limits

Operating
-40 to +125°C (5V input only)
-20 to +85°C
Storage
-40 to +125°C


Other

EMC Susceptibility
EN 61000-6-2
EMC Radiated
EN 61000-6-3
Vibration
IEC 68-2-6: 10g
Shock
IEC 68-2-29: 40g
MTBF
350,000 hrs 40°C Gf
Sealing
IP67
Electrical Connections
Screened cable or integral connector

Positek offers a range of options for its standard sensors. Each sensor is manufactured to suit each customer's preferences. If your requirement is outside the options given below, Positek can modify/ redesign a sensor to suit your specific requirement. Standard options are available as below:


Measurement Range

Factory set to any length from 0-51mm to 0-100mm in increments of 1mm. For example, if your application requires 3" (76mm) measurement, then Positek will manufacture the sensor specifically for this length. The mechanical length and calibration will be set up for 76mm.


Electronic Options

Output Signal
Supply Input
Option Code
Standard


0.5V to 4.5V DC ratiometric
+5V DC nom. ±0.5V
A
0.5V to 4.5V DC
+9 - 28V DC nom 24V
G
0.5V to 9.5V DC
+13 - 28V DC nom 24VC
4 to 20mA
+13-28V DC nom 24VH


Connector/Cable Options

Option
Option Code
Connector, Axial, IP67, M8 4 pin
J
Cable, Axial Gland IP67
L
Cable length - The standard length of cable supplied with a Positek position sensor is 50cm although you can specify any length you require.
Specified in cm after the L e.g. L200 for 200cm cable from axial cable gland


Mounting Options

Option
Option Code
Front flange mount
N
Body clamps (see drawing)
P


Plunger Options

Option
Option Code
Spring loaded (extended)
R
Dome end on plunger
T
Non-captive plunger (not with options "R" or "T")
V


<+/-0.1% FSO Linearity error
Option Code
Z650


image missing