Positek short stroke X138 linear position sensor

X138 Linear Position Sensor

The intrinsically safe X138 is ATEX and IECEx approved linear sensor for use in potentially explosive gas/vapour atmospheres.

The X138 is designed for a wide range of industrial applications and is ideal for OEMs seeking good sensor performance in situations where a short-bodied sensor is required for operation in hazardous areas. 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 rugged stainless steel body and plunger. It is easy to install and set up, mounting options include flange and body clamps. The plunger can be supplied free or captive, with female M4 thread, or spring-loaded with a ball end. The X138 also offers a wide range of mechanical options, environmental sealing is to IP65 or IP67 depending on selected cable or connector options.

Positek intrinsically safe sensors are designed to be used with a galvanically isolated amplifier. Approved galvanic isolation amplifiers (X005) are available from Positek; there is a choice of 0.5-9.5V or 4-20mA transmission outputs.
The sensor can be installed with a cable length up to 1km between the sensor and the amplifier.

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Description

The Positek short stroke X138 linear position sensor is ATEX and IECEx approved linear sensor for use in potentially explosive gas/vapour atmospheres.

The X138 is designed for a wide range of industrial applications and is ideal for OEMs seeking good sensor performance in situations where a short-bodied sensor is required for operation in hazardous areas. 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 rugged stainless steel body and plunger. It is easy to install and set up, mounting options include flange and body clamps. The plunger can be supplied free or captive, with female M4 thread, or spring-loaded with a ball end. The X138 short stroke sensor also offers a wide range of mechanical options, environmental sealing is to IP65 or IP67 depending on selected cable or connector options.

Positek intrinsically safe sensors are designed to be used with a galvanically isolated amplifier. Approved galvanic isolation amplifiers (X005) are available from Positek; there is a choice of 0.5-9.5V or 4-20mA transmission outputs.

The X138 linear position sensor can be installed with a cable length up to 1km between the sensor and the amplifier.

With over 25 years’ experience as a sensor manufacturer and using our onsite production facility, Positek has the flexibility to manufacture and customise any industrial position sensor, including tilt sensors and inclinometers, to any size or specification.

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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" (76 mm) measurement, then Positek will manufacture the sensor specifically for this length. The mechanical length and calibration will be set up for 76mm.

 

 

Connector/Cable Options

Option Option Code
Connector - Axial, IP67, M8 4 pin J
Cable with axial gland, IP67 L (3 core cable)
LQ (5 core cable)
Cable length - The standard length of cable supplied with a Positek position sensor is 50cm although you can specify any length you require up to a maximum of 15,000cm Specified in cm after the L/LQ e.g. L200 for 200cm cable from axial cable gland

 

Mounting Options

Option Option Code
Front flange mount N
Body Clamps 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

Intrinsic Safety

ATEX/IECEx approval

The sensor is ATEX/IECEx approved to:
Ex II 1G
Ex ia IIC T4 GA (Ta = -40°C to +80°C).
This designates the sensor as belonging to; Group II: suitable for all areas except mining, Category 1 G: can be used in areas with continuous, long or frequent periods of exposure to hazardous gas (Zone 0). Protection class ia, denotes intrinsically safe for all zones. Apparatus group IIC: suitable for IIA to IIC explosive gas. Temperature class T4: maximum sensor surface temperature under fault conditions 135°C. Ambient temperature range extended to -40°C to 80°C.
Approval only applies to the specified ambient temperature range and atmospheric conditions in the range 0.80 to 1.10 Bar, oxygen <=21%.
Galvanic Isolation Amplifier

Intrinsically safe sensors must be used with a galvanically isolated amplifier with safety parameters not exceeding:- Ui: 11.4V, Ii: 0.2A, Pi: 0.51W.  Sensor can be installed with a cable length up to 1000m maximum from the amplifier, cable capacitance and inductance can be up to:- Capacitance: 200 nF max, Inductance: 810 µH max.

Approved amplifiers are available from Positek; there is a choice of 0.5-9.5V or 4-20mA transmission outputs. 

 

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)

 

Temperature Limits

Operating -40 to +80°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 M8 4 pin connector

DATA SHEET

BODY CLAMPS

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