M112 Gauge Head Position Sensor
ATEX & IECEx approved intrinsically safe sensors for hazardous mining environments
This sensor at a glance
Available in any measurement range from 0-5mm to 0-50mm
Longer operating life than a potentiometer
Fast delivery options available
Body Diameter: 19mm
Sensor Mounting: 1/2" UNF thread
Spring loaded plunger
Sealed to IP67
< ±0.1% option available
Temperature range: -40°C to +80° C
The intrinsically safe M112 is ATEX and IECEx approved for use in potentially explosive gas/vapour, dust atmospheres and mining environments.
It is designed for gauge head positioning in industrial and scientific applications and is ideal for OEMs seeking good sensor performance for arduous applications in hazardous areas.
The M112, like all Positek sensors, provides a linear output proportional to displacement. Each sensor is supplied with the output calibrated to the travel required by the customer, from 0-5mm to 0-50mm and with full EMC protection built in. Overall performance, repeatability and stability are outstanding over a wide temperature range.
The sensor is very robust, the body and plunger being made of stainless steel for long service life and environmental resistance. The plunger is spring loaded with a domed end. The M112 is easy to install with a long ½ inch UNF mounting thread and is supplied with two lock nuts for positioning. 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 ||See drawing|
|Mounting Thread Length||59mm|
|Spring Force||1.5 - 4.5N (approximately)|
|Travel||Any stroke from 0-5mm to 0-50mm (e.g. 19mm)|
|Independent Linearity||<±0.25% at 20°C|
<±0.1% available on request
|Temperature Coefficient||<±0.01%/°C Gain & <±0.01%FS/°C Offset|
|Output Characteristics||See Graph|
|Operating||-40 to +80°C|
|Storage||-40 to +125°C|
|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|
|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:
Factory set to any length from 0-5mm to 0-50mm in increments of 1mm. For example, if your application requires 3/4" (19mm) measurement, then Positek will manufacture the sensor specifically for this length. The mechanical length and calibration will be set up for 19mm.
|Connector - Axial IP67, M12 - 4 pin||J|
|Connector - Radial IP67, M12 - 4 pin||K|
|Cable with PG9 gland Axial, IP67||L (3 core cable)|
LQ (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 e.g. L200 for 200cm 3 core cable from axial cable gland|
|<+/-0.1% FSO Linearity error (≥10mm stroke length)||Option Code|