CSA Approved Intrinsically Safe Sensors

Intrinsically Safe systems provide a safe operating environment for personnel and
equipment. Intrinsic Safety (IS) is based on the principle of restricting the
electrical energy transmitted into a hazardous area, thereby ensuring that any
sparks or heated surfaces that may occur as a result of electrical failures are
insufficient to cause ignition. The threat of an explosion is eliminated.

Positek CSA approved Intrinsically Safe sensors can be used in hazardous environments when connected to our approved galvanically isolated amplifier. Positek offers CSA approved Intrinsically Safe sensors for the following two hazard classifications:
'G' Series Sensors Position Sensors for use in potentially explosive
gas/vapour atmospheres.
'H' Series Sensors Position Sensors for use in potentially explosive
gas/vapour and dust atmospheres.

Positek sensors are now available in the EX06 versions which are CSA approved

to Intrinsic Safety Specification:
Class I, Zone 0
Ex ia IIC T4 (Ta = -40°C to +80°C)
AEx ia IIC T4 (Ta = -40°C to +80°C)
AEx iaD IIIC T93°C(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.

The sensors must be used with a galvanically isolated three port amplifier
designed to supply the sensor with a nominal 5V and to transmit the buffered
output to a safe area.



The Positek G005 Galvanic Isolation Amplifier designed specifically for use with Positek Intrinsically safe sensor range is available in the following output options:

0.5 to 9.5V

- G005-545
9.5 to 0.5V - G005-546
4 to 20mA - G005-425
20 to 4mA - G005-426



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  Positek Limited

L6 The Link   Andoversford Industrial Estate   Cheltenham   Glos GL54 4LB   UK
Tel: +44 (0) 1242820027   Fax: +44 (0)1242 820615   Email: Sales@Positek.com

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