The Type 3738 electronic valve
position monitor from Samson
Controls can be used on on/off
valves across a range of applications.

The device is a contactless,
magneto resistive sensor system that
works with a NAMUR signal in
compliance with IEC 60947-5-6 and
is powered by a two-wire supply. As a
result, the valve position monitor can
replace existing solenoid valves and
limit switches without the process of
changing wiring or signal levels. It
includes functions like self-tuning
and diagnostics, which opens up a
range of opportunities for control
and asset management.

The supply air for the actuator is
routed through bores at the bottom
of the housing. This makes it suitable
for integrated attachment, which
facilitates mounting and is also said
to guarantee ruggedness. The
contactless position sensor makes
adjustments as well as moving levers
redundant.