A5S1DD3-n (Ex nA)0 pages

A5S1-n

Differential-Hall-Effect based Sensors Ex nA
for Detection of Speed and Direction of Rotation
in Hazardous Areas Zone 2
Series A5S1DD3...-n / A5S1DS3...-n
KEY FEATURES
t Detection of rotational speed
t and direction of rotation
t in Hazardous Areas Zone 2
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-n Overall View

A5S1-n sensors – the best choice for demanding applications
The correct choice of sensor is always a prerequisite to attaining a successful solution.
Our A5S1-n sensors are based on the proven Differential-Hall-Effect principle. Their
low end of 0 Hz allows to monitor the machine down to zero speed. They are contactfree, wear-free, maintenance-free and unsusceptible versus external magnetic stray
fields and machine vibration. These characteristics make the series of A5S1-n
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

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

a choice of connections. However, functionally all sensors have the same characteris-

t Operates down to zero speed

tics. The stainless steel sensor housing is sealed at the front and is pressure resistant

t Can not be damaged by faulty wiring

(>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 2) we provide a non-

t Almost every target profile can
t be used
t A5S1-n Sensors do not influence
t each other, no mounting distance
t in between is required

sparking (non-incendive) variation of 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).

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