G112 Gauge Head Position Sensor
CSA approved intrinsically safe sensors for hazardous gas atmospheres
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° to +80°
Intrinsically Safe G112 is CSA approved for use in potentially explosive gas/vapour atmospheres. The G112 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 G112, 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 G112 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 (G005) 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.
|CSA Approval||This sensor is CSA approved to:|
Class I, Zone 0
Ex ia IIC T4 (Ta = -40°C to +80°C)
AEx ia IIC T4 (Ta = -40°C to +80°C)
Designates the sensor as belonging to; Class I, Zone 0: suitable for all areas except mining, : can be used in areas with continuous, long or frequent periods of exposure to hazardous gas / vapours. Protection class ia IIC, denotes intrinsically safe for Zones 0, 1 & 2 and IIA, IIB and IIC explosive gases. 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||It
is imperative Positek® intrinsically safe sensors be used in
conjunction with a galvanic barrier to meet the requirements of the
product certification. The Positek G005 Galvanic Isolation Amplifier is
purpose made for Positek IS sensors making it the perfect choice. Refer
to the G005 datasheet for product specification and output configuration
The Positek® G005 Galvanic Isolation Amplifier is available with 0.5 - 9.5V or 4 - 20mA transmission output options or reverse outputs of 9.5 - 0.5 volts or 20 - 4 mA.
|Body Length ||See drawing|
|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° |
<±0.1% available on request
|Temperature Coefficient||<±0.01%/°C Gain & <±0.01%FS/°C Offset |
|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 conductor|
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)
|Cable with boot Radial IP67||I (3 core cable)|
IQ (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 I/IQ e.g. L200 for 200cm 3 core cable from axial cable gland|
|<+/-0.1% FSO Linearity error (≥10mm stroke length)||Option Code|