Outdoor Microphone Preamplifier PRM2103 With Calibration Check
The Larson Davis PRM2103
has been designed to be used with an environmental shroud for portable
or permanent outdoor use in a wide range of weather conditions. The
PRM2103 combines the cost savings of a standard preamplifier with
features for unattended monitoring and an inexpensive shroud to create
a product that is ideal for remote sound level measurement.
New in the PRM2103 is an automatic
calibration check that checks
five different frequencies all at the same time
which enables better detection of any failure. When used with the Model
831 sound level meter, the acoustic response can be selected
as free-field, random or
using a simple setting on the sound level meter. Because of this
flexibility, only one preamplifier is necessary and there is no need to
use different microphones for different fields.
field visits to a remote monitor can be expensive and time consuming,
the PRM2103 has been designed to require no routine maintenance. It
includes a built-in
humidity and temperature sensor and can automatically
turn on an internal heater when there is a risk of condensation. All
this has been accomplished while keeping
power usage low (< 2 mA with heater off) so that
the PRM2103 is an excellent solution for battery powered applications.
Learn more at Larson Davis website....
Protection Shroud EPS2116
is designed to work with almost any combination of ½ inch precision
microphone and preamplifier for outdoor use. Because the EPS2116 is
designed with an integral
rain shield it will keep your microphone dry even in a
EPS2116 with the Larson Davis
PRM2103-FF outdoor microphone and Model 831 sound level meter
to produce an ideal outdoor noise measuring system, without the need
for desiccants and with minimal routine maintenance. When combined with
the PRM2103-FF the
integrated heater eliminates the need for desiccants and
the remote calibration
check minimizes routine maintenance.
the EPS2116 with the Model 831
or SoundExpert LxT
sound level meter, the built in correction filters allow for class 1
response in free field
(0º), random (diffuse), or 90º fields. This is
accomplished with a single microphone, Model 377B02, and a simple
selection on the sound level meter.
Outdoor Microphone 426A12
The Larson Davis 426A12 Outdoor
Microphone has been designed for permanent outdoor use in any
weather condition. It is constructed of stainless
steel to resist corrosion, and its profile minimizes both
wind resistance and acoustic reflections. It includes a rain hat, wind
screen and bird spikes and an electrostatic actuator which
can be controlled remotely for on-site calibration
checks. With the proper choice of microphone, it can provide frequency
response characteristics consistent with precision sound level meter
requirements for free-field measurements. Equipped with A, C and
Z-weighting filters and a 20 dB gain, the 426A12 is ideal for use with
any electronic sound measurement system.
A hydrophobic membrane vent and replaceable
desiccant cartridges prevent moisture from reaching the microphone
through the vent. The saturation status of the desiccant
cartridges can be determined remotely using signals from
internal temperature and humidity sensors, as well as
visually through an observation window.
The Larson Davis Model 831 sound level meter is
the ideal complement to the Model 426A12 Permanent Outdoor Microphone
for Noise Monitoring Systems.