M502 Small Angle Rotary Sensor
ATEX & IECEx approved intrinsically safe sensors for hazardous mining environments
This sensor at a glance
Available in any measurement angle from 5° to 15°
(for 16-160° range see M500)
Longer operating life than a potentiometer
Fast delivery options available
Body Diameter: 35mm
Sensor Mounting: Flange or servo
Spring loaded shaft option
Sealed to IP67
<±0.25% FSO at 20°C
Temperature range: -40°C to +80°C
The intrinsically safe M502 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, 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.
This sensor is ATEX/IECEx approved to:
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.
|Body Length (to seal face)
||15mm, OD 6mm
For full mechanical details see drawing
||Any angle from ±2.5° to ±7.5°
||<±0.25% FSO at 20°C|
||<±0.01%/°C Gain & <±0.01%FS/°C Offset
||-40 to +80°C
||-40 to +125°C|
||IEC 68-2-6: 10g
||IEC 68-2-29: 40g|
||350,000 hrs 40°C Gf
||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:
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 - Axial, 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)
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|