Datasheet

46
Switchable optics 2:
Near field close focus (1
mm, 70 mm distance)
with 2 point laser
sighting
Switchable optics 1:
far field 75:1 (16 mm,
1200 mm distance) with
cross-laser sighting
testo 845 with additional
humidity module for
measuring ambient air
humidity and
determining dew
point difference
Fast documentation
thanks to on-site printout
For the first time, surface
temperatures with smallest
diameters can be measured
accurately at short and long
distances. The switchable optics for
far-field and close focus
measurement make this possible.
Measurements in the far-field are
made with an optical resolution of
75:1. Surface temperatures can
thus be measured accurately even
at greater distances from the object
to be measured. At a distance of
1.2 metres from the object, the
measurement point diameter is only
16 mm. A cross laser marks the
measurement point exactly.
For measurements at a small
distance from the object to be
measured, the close focus optics
provide a measurement point
diameter of only 1 mm at a
distance of 70 mm! Two laser
points mark the measurement
point.
• Switchable optics for far-field
measurements (75:1) and close
focus (1 mm, 70 mm distance)
• Especially bright cross laser
sighting for indicating the actual
measuring point
• Reference accuracy ± 0.75 °C
with super-fast measurement
technololgy (scanning 100 ms)
• Backlit display (3-line) showing
°C, min./max. values, alarm limit
values and degree of emission;
additional display with humidity
module: %RH, °Ctd
• Optical and audible alarm when
limit values are exceeded
• Instrument memory for 90
measurement protocols
• PC software for archiving and
documenting measurement data
(included in delivery)
• Tripod fitting for online
measurement via USB cable
(included in delivery)
testo 845 – Infrared measurement technology for temperature with built-in humidity module