M133 Mid Stroke Linear Position Sensor

ATEX & IECEx approved intrinsically safe sensors for hazardous mining environments

Linear

This sensor at a glance

Available in any measurement range from 0-51mm to 0-100mm
(for 2-50mm range see M103)

Longer operating life than a potentiometer

Fast delivery options available

Body Diameter: 35mm

Sensor Mounting: Flange

Spring loaded pushrod option available

Sealed to IP67

Independent Linearity:
< ±0.25%
< ±0.1% option available

Resolution: Infinite

Temperature range: -40°C to +80°C

The intrinsically safe M133 is ATEX and IECEx approved for use in potentially explosive gas/vapour and dust atmospheres and mining environments. It is designed for a wide range of industrial applications and is ideal for OEMs seeking good sensor performance in situations where a mid-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, the stainless steel mounting flange has two 4.5mm by 30 degree wide slots on a 48mm pitch. The plunger can be supplied free or captive, with female M4 thread, or spring-loaded with a ball end. The M133 also offers a range of mechanical options, environmental sealing is to IP67.

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.

Intrinsic Safety

ATEX/IECEx Approval

This sensor is ATEX/IECEx approved to:
Ex I/II M1/1GD
Ex ia IIC T4 Ga (Ta = -40°C to + 80°C )
Ex ia 111C 20 T135°C Da (Ta = -40°C to + 80°C )
Ex ia I Ma (Ta = -40°C to + 80°C )
This designates the sensor as belonging to; Groups I and II: suitable for all areas (including mining), Category M1/1 GD: can be used in areas with continuous, long or frequent periods of exposure to hazardous gas (Zones 2 to 0) and dust (Zone 20), equipment remains energised.

Gas:
Protection class ia, denotes intrinsically safe for all zones.
Apparatus group IIC: suitable for IIA, IIB and IIC
explosive gases.
Temperature class T4: maximum sensor surface
temperature under fault conditions 135°C .

Dust:
T135°C: maximum sensor surface temperature under fault conditions 135°C.

Ambient temperature range extended to -40°C to +80°C .

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
35mm
Body Length
Travel: 51-70mm - Length: 141.3mm
Travel: 71-100mm - Length: 171.3mm
Push Rod Outside Diamteter
6mm
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
See Graph
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 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.


Connector/Cable Options

Option
Option Code
Connector IP67 M12 4 pin
J
Cable with axial gland, IP67
L (3 core cable)
LQ (5 core cable)
(click for more information)
Cable with axial short gland, IP67
M (3 core cable)
MQ (5 core cable)
(click for more information)
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 or M/MQ e.g. L200 for 200cm cable from axial cable gland


Plunger Options

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


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


Click Here for approved Galvanic Isolation Amplifier Options


Galvanic Isolation Amplifier
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Outline
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Request AutoCAD Drawing
Datasheet
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Installation Sheet
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