M502 Rotary Position Sensor

Description

The Positek M502 small angle rotary position sensor is ATEX and IECEx approved for use in potentially explosive gas/vapour, dust atmospheres and mining environments.

It is designed for industrial and scientific feedback applications, like the M500 but with better resolution at smaller angles of deflection, and is ideal for OEMs seeking good sensor performance for arduous applications in hazardous areas.

The M502 small angle rotary position sensor, like all Positek® sensors, provides a linear output proportional with angle of rotation. Each unit is supplied with the output calibrated to the angle required by the customer, between 5 and 15 degrees and with full EMC protection built in. There is a machined registration mark to identify the calibrated mid point.

Overall performance, repeatability and stability are outstanding over a wide temperature range. The M502 has long service life and environmental resistance with a rugged stainless steel body, shaft, flange or servo mount. The flange or servo mounting options make the sensor easy to install, it 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.

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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 ±2.5° to ±7.5° in increments of 1°. For example, if your application requires 10° measurement, then Positek will manufacture the sensor specifically for this angular range. The sensor will measure 10° however will still rotate through 360°.

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)
Cable with axial short gland, IP67	M (3 core cable) MQ (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 or M/MQ e.g. L200 for 200cm cable from axial cable gland

Mounting Options

Option	Option Code
Flanged housing	Blank
Servo mount	P

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 (to seal face)	44mm
Shaft	15mm, OD 6mm
Measurement range	Any angle from ±2.5° to ±7.5°
Independent Linearity	<±0.25% FSO at 20°C
Temperature Coefficient	<±0.01%/°C Gain & <±0.01%FS/°C Offset
Resolution	Infinite
Noise	<0.02% FSO
Shaft Torque	<020mNm static
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

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M502 Rotary Position Sensor

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M505 Rotary Position Sensor