G125  Rugged IP68 350bar Submersible Stand Alone Linear Position Sensor

CSA approved intrinsically safe underwater sensor for hazardous gas atmospheres

Underwater

This sensor at a glance

Available in any measurement range from 0-5mm to 0-800mm

Longer operating life than a potentiometer

Fast delivery options available

Body Diameter: 40mm

Sensor Mounting: M8 rod eyes, body clamps or M8 threads

Spring loaded pushrod option available

Sealed to IP68 350bar, 3500msw, 5000psi

Independent Linearity:
< ±0.25% up to 450mm
< ±0.5% over 450mm
< ±0.1 % option available

Resolution: Infinite

Temperature range: -4 to +50°C

Intrinsically Safe 350bar G125 is CSA approved for use in potentially explosive gas/vapour atmospheres. With a strong 12.6mm push rod it is recommended for applications where high pressure sealing is required or where vibration is an issue or there is a need for longer travel sensors are to be mounted horizontally between rod eyes. It remains an affordable, durable, high-accuracy position sensor designed for applications where the sensor requires IP68 Sealing. The unit is highly compact and space-efficient, being responsive along almost its entire length. Like all Positek® sensors, the G125 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 0-800mm and with full EMC protection built in.

The sensor is very robust, the body and push rod being made of stainless steel for long service life and environmental resistance.

Overall performance, repeatability and stability are outstanding over a wide temperature range. The sensor is easy to install with mounting options including stainless steel M8 rod eye bearings and body clamps. The push rod can be supplied free or captive, with M8 thread, or an M8 stainless steel rod eye. The G125 also offers a selection of mechanical and electrical options, environmental sealing is to IP68 350 Bar (5000psi, 3500m).

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.

Intrinsic Safety

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 options.

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.


Dimensions

Body Diameter
40mm end cap, 35mm body tube
Body Length
Click for PDF
Push Rod Extension
Measurement length + 7mm
Push Rod Outside Diameter
12.6mm
Travel
Any stroke from 0-5mm to 0-800mm (e.g. 305mm)
Independent Linearity
<±0.25% up to 450mm
<±0.50% over 450mm at 20°C
<±0.1% available on request
Temperature Coefficient
<±0.01%/°C Gain & <±0.01%FS/°C Offset
Resolution
Infinite
Noise

<0.02% FSO

Frequency Response

>10KHz (-3dB)


Temperature Limits

Operating
-4 to +50°C
Storage
-4 to +50°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
Sealing
IP68 350bar, 5000psi, 3500m submersion
Electrical Connections
Screened cable

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 0-5mm to 0-800mm in increments of 1mm. For example, if your application requires 10" (254 mm) measurement, then Positek will manufacture the sensor specifically for this length. The mechanical length and calibration will be set up for 254 mm.


Connector/Cable Options

Option
Option Code
Axial micro wet mate bulkhead and mating connector with 50cm flying lead (standard fit).
Mating connector with longer cable available as special
J50
Radial micro wet mate bulkhead and mating connector with 50cm flying lead (standard fit).
Mating connector with longer cable available as special
K50


Mounting Thread Size Options

Option
Option Code
M8 rod eye on body (only with option "K")
N
Body clamps, 1 pair (see drawing)
P
Body clamps, 2 pair (see drawing)
P2
M8 rod eye on push rod
U


Push Rod Options

Option
Option Code
Spring loaded (extended) (up to 300mm stroke - for longer strokes please contact Positek)
R
Spring loaded (retracted) (up to 300mm stroke - for longer strokes please contact Positek)
S
Dome end on push rod (only with option "R")
T
Non-captive push rod
V


<+/-0.1% FSO Linearity error (≥10mm and ≤400mm stroke length) 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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