The S503 humidity calibrator from
Michell Instruments is said to make
field calibration of RH sensors and
humidity prob
Weighing less than 2kg and 24cm
wide, the instrument is portable,
compact and comes with a
convenient carry case.

It provides thermal stability to
better than 0.1°C. In combination
with a Michell Chilled Mirror
Hygrometer, such as the Optidew
Vision, it is possible to create a
complete traceable humidity
calibration system.

The S503 can be used by all staff
as no specialist training or
experience is necessary. The
calibration chamber can calibrate up
to 7 probes at once helping to save
time as well as money.