Campbell Scientific PWS100 Present Weather Sensor - Manual (Page 13)

Section 2. Cautionary Statements
2.1 Sensor Unit Safety
The PWS100 sensor has been checked for safety before leaving the factory and
contains no internally replaceable or modifiable parts.
Do not modify the PWS100 unit. Such modifications
will lead to damage of the unit and could expose users
to dangerous laser light levels and voltages. WARNING
In unusual failure modes and environmental
conditions the sensor hood could become hot. In
normal operation they will be at ambient temperature
or slightly above. WARNING
Ensure that the correct voltage supply is provided to the sensor. CAUTION
2.2 Laser Safety
The PWS100 sensor incorporates a laser diode which is rated as a class 3B
device. This is an embedded laser where the output from the sensor unit,
through the optics, is minimized to class 1M. This classification indicates that
viewing of the beam with the naked eye is safe but looking directly into the
beam with optical instruments, e.g. binoculars can be dangerous.
From the laser head the output has the following characteristics:
Maximum pulse energy: 73 nJ
Pulse duration: 5.2 μs
Wavelength: 830 nm
EN 60825-1:2001
The sensor is marked with the following warning:
INVISIBLE LASER RADIATION
DO NOT VIEW DIRECTLY WITH OPTICAL INSTRUMENTS
CLASS 1M LASER PRODUCT
Opening the laser head unit with the power applied to the PWS100 may expose
the user to hazardous laser radiation. To open the unit requires the use of tools
and should not be carried out except by authorized personnel using appropriate
safety eyewear.
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