S125 Rugged IP68 350bar Submersible Stand Alone Linear Position Sensor

Position feedback for underwater marine and offshore applications

Underwater

This sensor at a glance

Available in any measurement angle from 0-5mm to 0-800mm

Longer operating life than a potentiometer

Fast delivery options available

Body Diameter: 40mm

Sensor Mounting: M8 rod eyes, body clamps or M8 threads

Spring loaded pushrod option available

Sealed to IP68 350bar, 3500msw, 5000psi

Independent Linearity:
< ±0.25% up to 450mm
< ±0.5% over 450mm
< ±0.1 % option available

Resolution: Infinite

Temperature range: -4 to +50°C

The 350bar S125  is a higher pressure version of the S115 sensor with a larger electronics housing and wet mate high pressure connector. The S125 is sealed for continual submersion up to 3500m (350bar 5000psi). The unit is compact, space-efficient and responsive along almost its entire length.

Like all Positek sensors, the S125 provides a linear output proportional to displacement. Each sensor is supplied with the output calibrated to the travel required by the customer, our standard range covers any measurement range from 0-5mm to 0-800mm. As with all of our packaged sensors full EMC protection is built in.

The sensor is very robust, the body and push rod being made of 316 stainless steel for long service life and environmental resistance.

Overall performance, repeatability and stability are outstanding over a wide temperature range. The sensor is easy to install with mounting options including 316 stainless steel M8 rod eye bearings and 316 stainless body clamps. The push rod can be supplied free or captive, with M8 thread, or an M8 stainless steel rod eye. The S125 also offers a wide range of mechanical and electrical options, environmental sealing is to IP68 350Bar (5000psi).
This sensor is waterproof for submersion to 3500 meters.

Dimensions

Body Diameter
40mm end cap, 35mm body tube
Body Length (Axial version)
Measurement Length + 184mm
Body Length (Radial version)Measurement Length + 189mm
Push Rod Extension
Measurement Length + 7mm
Push Rod Outside Diameter
12.6mm
Travel
any stroke from 0-5mm to 0-800mm (e.g. 305mm)
Independent Linearity
<±0.25% up to 450mm
<±0.50% over 450mm at 20°C
<±0.1% available on request
Temperature Coefficient
<±0.01%/°C Gain & <±0.01%FS/°C Offset
Output Characteristics
See Graph
Resolution
Infinite
Noise

<0.02% FSO

Frequency Response

>10KHz (-3dB);
>300Hz (-3dB); 2 wire 4-20mA


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
± 5V DC
5k Ohms min
± 10V DC
5k Ohms min
0.5 to 9.5 V DC
5k Ohms min
4 to 20mA (2 wire)
300 Ohms max at 24V
4 to 20mA (3 wire sink)
950 Ohms max at 24V
4 to 20mA (3 wire source)
300 Ohms max at 24V
Supply Current
12 mA Typical 20 mA max (voltage versions)


Temperature Limits

Operating
-4 to +50°C
Storage
-4 to +50°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
Sealing
IP68 350bar, 5000psi, 3500m
Electrical Connections
Micro wet mate 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 0-5mm to 0-800mm in increments of 1mm. For example, if your application requires 10" (254mm) measurement, then Positek will manufacture the sensor specifically for this angular range. The sensor will measure 10° however will still rotate through 254mm.


Electronic Options

Output Signal
Supply Input
Option Code
Standard


0.5V to 4.5V DC ratiometric
+5V DC nom. ±0.5V
A
Buffered


0.5V-4.5V DC
+24V DC nom. +9-28V
G
±0.5V DC
±15V DC nom. ±9-28VB
0.5-9.5V DC
+24V DC nom. +13-28V
C
±10V DC±15V DC nom. ±13.5-28VD
4-20mA (2 wire)
+24V DC nom. +18-28V
E
4-20mA (3 wire sink)
+24V DC nom. +13-28V
F
4-20mA (3 wire source)
+24V DC nom. +13-28V
H


Connector/Cable Options

Axial micro wet mate bulkhead and mating connector with 50cm flying lead (standard fit)
Mating connector with longer cables avaliable as special.
J50
Radial micro wet mate bulkhead and mating connector with 50cm flying lead (standard fit)
Mating connector with longer cables avaliable as special.
K50


Mounting Options

Option
Option Code
M8 Rod eye on body (only with option "K")
N
Body clamps, 1 pair (see drawing)
P
Body clamps, 2 pairs (see drawing)P2
M8 rod eye on push rod
U


Push Rod Options

Option
Option Code
Spring loaded (extended) (up to 300m stroke - for longer strokes please contact Positek)
R
Spring loaded (retracted) (up to 300m stroke - for longer strokes please contact Positek)
S
Dome end on push rod (only with option "R")
T
Non captive push rod
V


<+/-0.1% FSO Linearity error (≥10mm and ≤400mm stroke length)Option Code
Z650


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