First in Full Range PDA Spectrometer, Spectroradiometer and Spectrophotometer Systems
1 Canal Street  ◊  Unit B1
Lawrence, MA 01840  USA
Tel: 978 687-1833  ◊  Fax: 978 945-0372

Copyright © 2012 Spectral Evolution, Inc
The PSR+ is designed for field use in vegetation, forest canopy, species
identification and crop studies. The unit is lightweight and portable with two Li-ion
batteries for a full day in the field, and no moving optical parts to breakdown. High
resolution and unmatched sensitivity (NER specifications) make the PSR+ the
spectroradiometer of choice for critical field work, including ground truthing of
data from satellites.
A portable field spectroradiometer like the PSR+ can be an
important instrument for characterizing many soil properties in a
single scan including soil moisture. Accurate measurement of
moisture content in soil can provide critical information on soil
successful water management through irrigation in agricultural

Proximal soil analysis using a PSR+ agricultural
spectroradiometer can provide information on the health of the
soil and the associated vegetation. The PSR+ allows for rapid
field measurement of moisture in soil by collecting spectral
information related to the main water features at 1450-1460nm
and 1920-1930nm. In addition to providing a measurement of
water content, it also delivers information that can be used to
derive leaf and canopy water content. The PSR+ can be used for
ground truthing data from satellites or flyovers to ensure that it
is accurate and complete.

The PSR+ is a full range (350-2500nm) NIR field portable
spectroradiometer with high resolution and high sensitivity for
clear and accurate spectra. Using the PSR+, spectra are
collected quickly, accurately and without sample preparation.

All data is saved as ASCII files for use with 3rd party analysis
software like R or ENVI. The PSR+ and all Spectral Evolution
spectroradiometers include DARWin SP Data Acquisition
software with 19 vegetation indices, including the Normalized
Difference Water index (NWDI) and Water Band Index (WBI). The
indices are accessed from pull down  menus in DARWin.

Optional EZ-ID sample identification software includes access to
mineral identification libraries - very useful for identifying clays,
as well as a library builder module that allows for the creation of
application specific libraries of known spectra that can then be
used to identify new samples.
DARWin SP Data Acquisition software is included with every spectrometer and
spectroradiometer. DARWin includes a pulldown menu for access to 19
Measuring Moisture in Soil