G623 Submersible Large Angle Tilt Sensor

CSA approved intrinsically safe underwater sensor for hazardous gas atmospheres

About the G623 Submersible Large Angle Tilt Sensor

Intrinsically safe 350bar G623 is CSA approved for use in potentially explosive gas/vapour atmospheres. The G603 is designed for industrial and scientific feedback applications and is ideal for OEMs seeking good sensor performance for arduous applications in hazardous areas.

It is sealed to IP68 350bar (5000psi, 3500m depth).

The G623, like all Positek® sensors, is supplied with the output calibrated to the angle required by the customer, between 15 and 160 degrees and with full EMC protection built in. The sensor provides a linear output characteristic with angle of deflection. There is a machined registration mark to identify the calibrated mid point.
Overall performance, repeatability and stability are outstanding over a wide temperature range.

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.


Key features G623

  • Intrinsically safe for Gas to: Class I, Zone 0 Ex ia / AEx ia
  • Non-contacting inductive technology to eliminate wear
  • Angle set to customer’s requirement
  • Compact and self-contained
  • High durability and reliability
  • High accuracy and stability
  • Sealing to IP68 350 Bar


Body Diameter 40 mm, Flange 69 mm | Body Length (to seal face) 81 mm
Power Supply
+5V dc nom. ± 0.5V, 10mA typ 20mA max
Output Signal
0.5-4.5V dc ratiometric, Load: 5kΩ min.
Independent Linearity/Hysteresis
(combined error) < ± 0.25° - up to 100°
Temperature Coefficients
< ± 0.01%/°C Gain & | < ± 0.01%FS/°C Offset
Response Time
250 mS @ 20°C typ.
Damping Ratio
0.2 : 1 (0.6 nom. @ 25°C
< 0.02% FSO
Intrinsic Safety
Class I, Zone 0 | Ex ia IIC T4 (Ta = -40°C to +80°C) | AEx ia IIC T4 (Ta = -40°C to +80°C)
Environmental Temperature Limits
Operating -4°C to +50°C | Storage -4°C to +50°C
IP68 350Bar
EMC Performance
EN 61000-6-2, EN 61000-6-3
IEC 68-2-6: 10 g
IEC 68-2-29: 40 g
350,000 hrs 40°C Gf
Drawing List
G623-11 Sensor Outline
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