A5S1DS0 (Ex ia)0 pages

A5S1

Differential-Hall-Effect based Sensors Ex ia for
Detection of Speed in Hazardous Areas Zone 0 or 1
Series A5S1DD0 / A5S1DS0
KEY FEATURES
t Detection of rotational speed
t in Hazardous Areas Zone 0 or 1
t Speed range from 0 Hz up to 25 kHz
t (response time < 20 microseconds)
t Air gap to the target / pole wheel up to
t 2.5 mm (depending on the profile size)
t Temperature range –40…+125 °C
t (–40…+255 °F)
t Differential principle diminishes the
t influence of external magnetic stray t
t fields and of machine vibration
t Sealed stainless steel enclosure
t > 200 bar pressure to sensor tip
t Available for connection via tight plug,
t or with firmly attached cable (PVC
t or Teflon® insulated)
t Powerful square wave output signal
t equally high over the entire speed
trange
A5S1 Overall View

A5S1 sensors – the best choice for demanding applications

t Sensor short circuit proof and
t protected versus polarity error
t Accepting fine and coarse profiles,
t as gear wheels, slots, cams, holes in
t any ferrous material

The correct choice of sensor is always a prerequisite to attaining a successful solution.

BENEFITS

Our A5S1 sensors are based on the proven Differential-Hall-Effect principle. Their low

t Contact-free with a large air gap, so
t the potential for damage is eliminated

end of 0 Hz allows to monitor the machine down to zero speed. They are contact-free,
wear-free, maintenance-free and unsusceptible versus external magnetic stray fields
and machine vibration. These characteristics make the series of A5S1 sensors especially
suited for all applications where high levels of accuracy and reliability are at a premium.
In contrast, other sensors like magnet inductive or static Hall-sensors do not meet
these demands.
Each sensor in the series is available in various lengths and diameters and comes with
a choice of connections. However, functionally all sensors have the same characteristics. The stainless steel sensor housing is sealed at the front and is pressure resistant
(>200bar). A flat shaft is available or with a screw-in thread M12x1, M14x1, M14x1,5,
M16x1, M16x1,5, M18x1, M18x1,5, M22x1, 5/8-18UNF-2A. Customized dimensions
and thread specifications are possible.
To meet the particular requirements of hazardous areas (Ex Zone 0 or 1) we provide

t Wear-free due to its unique design
tprinciple
t Maintenance-free during Lifetime,
t therefore minimized TCO
t Unsusceptible versus external
t magnetic stray fields and machine
tvibration
t Operates down to zero speed
t Can not be damaged by faulty wiring
t Almost every target profile can
t be used
t A5S1 Sensors do not influence
t each other, no mounting distance
t in between is required

these specialized types which are ATEX / IECEx certified, as well as being approved
for other international standards such as UL / CSA and EAC (Russia, Kazakhstan and
Belarus Customs Union). A5S1 sensors in conjunction with our Isolating Barrier D461
provide an intrinsically safe implementation to meet these specialized requirements.
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