4
Introduction
We are confident you will find many uses
for your handheld noncontact thermome-
ter. Compact, rugged, and easy to use—
just aim, pull the trigger, and read the
temperature in less than a second. You
can safely measure surface temperatures
of hot, hazardous, or hard-to-reach
objects without contact.
How it Works
Infrared thermometers measure the sur-
face temperature of an object. The unit’s
optics sense emitted, reflected, and trans-
mitted energy, which are collected and
focused onto a detector. The unit’s elec-
tronics translate the information into a
temperature reading which is displayed
on the unit. The laser is used for aiming
purposes only.
Reflected energy
Emitted energy
Transmitted energy
EMISSIVITY
Target
English
1.888.610.7664
Summary of Contents for Raynger ST 20 Pro
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