P118 Slim-line Short Stroke Linear Sensor

Position feedback for industrial and scientific applications


This sensor at a glance

Available in any measurement range from 0-2mm to 0-50mm
(for 51-100mm range see P138)

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% 
< ±0.1% option available

Resolution: Infinite

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

The P118 with its compact 19 mm diameter stainless steel body 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 0-2mm to 0-50mm and with full EMC protection built in.

Overall performance, repeatability and stability are outstanding over a wide temperature range. The sensor 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 P118 also offers a range of mechanical options, environmental sealing is to IP67.


Body Diameter
Any stroke from 0-2mm to 0-50mm (e.g. 21mm)
Independent Linearity
<±0.25% at 20°C
<±0.1% available on request
Temperature Coefficient
<±0.1%/°C Gain & <±0.1%FS/°C Offset

<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

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


EMC Susceptibility
EN 61000-6-2
EMC Radiated
EN 61000-6-3
IEC 68-2-6: 10g
IEC 68-2-29: 40g
350,000 hrs 40°C Gf
Electrical Connections
Screened cable or M8 4 pin 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 0-2mm to 0-50mm in increments of 1mm. For example, if your application requires 1" (25 mm) measurement, then Positek will manufacture the sensor specifically for this length. The mechanical length and calibration will be set up for 25 mm.

Electronic Options

Output Signal
Supply Input
Option Code

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

Connector/Cable Options

Option Code
Connector, Axial, IP67, M8 4 pin
Cable, Axial, Gland IP67
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 Code
Front flange mount
Body clamps (see drawing)

Plunger Options

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

<+/-0.1% FSO Linearity error (10mm minimum stroke length) 
Option Code

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