Measuring Efficient Light Usage in plants with a Field Spectroradiometer

spectral measurements from a field spectroradiometer

 DARWin SP software includes 19 popular vegetation indices

Lawrence, MA, USA – When used with spectral measurements from a field spectroradiometer such as the PSR+ from Spectral Evolution, the Photochemical Reflectance Vegetation Index (PRI) and Red/Green Vegetation Index (Red/Green) can provide researchers with important data on the ability of vegetation to efficiently use sunlight for photosynthesis.

This data can provide a picture of plant health including an assessment of plant stress.

One of the 19 vegetation indices offered with DARWin SP Data Acquisition software and the PSR+ field spectroradiometer, PRI looks at the carotenoid pigments, especially the xanthophyll pigments absorbed by plants.

The pigments can signify growth rate and biomass production. PRI uses the wavelengths of light from 400 to 700 nanometers and has a measurement range of -1 to 1 with healthy vegetation falling between the values of -0.2 to 0.2 in the PRI index.

In addition to PRI, the PSR+ with DARWin SP includes the Red/Green Index for growth cycle studies, stress detection of canopies, and prediction of potential crop yield.

The Red/Green Index measures the expression of leaf redness caused by anthocyanin to the green caused by chlorophyll. It can be used as an indication of leaf production and/or stress. The means of the bands in the red range are divided by those in the green range.

The typical range for green vegetation is 0.7 to 3.

DARWin provides access to the following Vegetation Indices:

  • GRVI (Green Ratio Vegetation Index)
  • SR (Simple Ratio Vegetation Index)
  • DVI (Difference Vegetation Index)
  • SAVI (Soil Adjusted Vegetation Index)
  • Red/Green (Red Green Ratio)
  • ARVI (Atmospherically Resistant Vegetation Index)
  • Green NDVI (Green Normalized Difference Vegetation Index)
  • EVI (Enhanced Vegetation Index)
  • MSAVI2 (Modified Soil Adjusted Vegetation Index Type II)
  • IPVI (Infrared Percentage Vegetation Index)
  • Sum Green (Summed Green Vegetation Index)
  • PRI (Photochemical Reflectance Index)
  • NDVI 705 (Red Edge Normalized Vegetation Index)
  • WBI (Water Band Index) NDWI (Normalized Difference Water Index)
  • PAR (Photosynthetically Active Radiation)

These vegetation indices can be used with our field units to confirm or correct hyperspectral imagery with ground truthing or as part of a grid approach to mapping and measuring an area, for example, a crop field.

For more information:

Or, to speak with a Technical Specialist:


Established in 2004, SPECTRAL EVOLUTION is a leading manufacturer of laboratory and handheld portable spectrometers, spectroradiometers and spectrophotometers. SPECTRAL EVOLUTION spectrometers are used worldwide for many mission-critical lab and field applications in mining, remote sensing, vegetative studies, ground truthing, environmental and climate studies, developing satellite calibrations, and more, due to their reliable, robust, rugged design and user-friendly one-touch features.

Press contact

Mo Kashdan
Marketing & Sales


1 Canal Street, Unit B1
Lawrence, MA 01840 USA

Endress+Hauser Installs High Pressure Test Rig in Greenwood, Indiana


E+H can now test complete instrument assemblies up to 15,000 psi

Online  —  There’s a new story describing a high pressure test rig that Endress+Hauser installed at its U.S. headquarters in Greenwood, Indiana.

The rig allows E+H to test complete instrument assemblies to customer specifications, and provides a 100% test indicating a specific instrument can withstand the design process pressure, up to 15,000 psi.

This may be the only high pressure test facility operated by an instrument manufacturer in the U.S. Continue reading

ALPhANOV’s PRISM-Award-2017-finalist ‘GoSpectro’

A device that turns smartphones into light spectrometers

Bordeaux, France — ALPhANOV will be present on the Photonics West 2017 (31 January – 2 February 2017 | San Francisco French Pavillion, Booth #1823 C) where you will discover our new products, as our Go Spectro, a Prism Awards finalist!

Go Spectro, makes it easier to inspect and authenticate gems, water quality (pollution detection), food quality (color measurement, allergen detection) and other anti-counterfeit applications. Continue reading

Mahr Federal Air Gaging Improves GR&R and Process Capability on Rotor Shaft & Endplate Bearing Bore Manufacturing


Mahr Federal Air Gaging at Baldor Electric

PROVIDENCE, RI, USA – As part of its continuous improvement process, Baldor Electric Company recently reached out to Mahr Federal to help identify opportunities to improve process capabilities within their machining cells.

One of the goals of the project was to reduce failure costs on several components.

Founded in 1920 and headquartered in Fort Smith, AR, Baldor is a leading manufacturer of industrial electric motors and mechanical power transmission products sold to distributors and original equipment manufacturers in more than 70 countries. Continue reading

Digital Calipers and Indicators with Integrated Wireless Data Transmission

Eliminates cumbersome cables & external transmitters

Mahr_wirelessPROVIDENCE, RI, USA – Mahr Federal wireless data transmission capability is now integrated within its families of MarCal digital calipers and MarCator digital indicators using proven wireless technology.

Both MarCal digital calipers and MarCator digital indicators send data to a small i-stick receiver, resembling a common USB flash drive.

MarCom software makes data acquisition simple: just take a measurement and transmit measuring data directly into MS Excel or via a keyboard code into any Windows program without the need for external transmitters or cumbersome cables. Continue reading

New MarShaft™ SCOPE 250 plus At Metrology Solutions Expo

The First Metrology Solutions Expo


MarShaft SCOPE 250 plus


PROVIDENCE, RI, USA – Mahr Federal will feature the MarShaft™ SCOPE 250 plus, along with the MarVision MM 320, the MarVision QM 300, and MarCal digital calipers and MarCator digital indicators at the first Metrology Solutions Expo, May 4-5, 2016, TD Convention Center in the James H. Woodside Conference Center, Greenville, SC, USA.

The first Metrology Solutions Expo will feature all types of precision measuring tools, gages, fixtures, systems and software used in manufacturing applications, and will include demonstrations of the latest precision metrology equipment from the world’s leading names in the quality business. Continue reading

Next Generation Waterproof Digital Calipers

Introduced by Mahr Federal


MarCal 16 ER Digital Caliper

PROVIDENCE, RI, USA – Mahr Federal has introduced the next generation of waterproof digital calipers with the new MarCal 16 EWR.

Featuring a new ergonomic design with lapped guideways and larger display, the MarCal 16 EWR offers IP 67 protection against dust, coolants and lubricants, extended three-year battery life, and an innovative zero-reference system which automatically stores the zero position for further measurements.

The product is available for next day delivery.

The ergonomic design of the new MarCal 16 EWR digital calipers features a handy non-slip thumb support that ensures trouble-free handling and reliable results even in contaminated working conditions. Continue reading

Accurate Measurement of Microscope Illumination

1.5 nm resolution

LumaSpec800Fulbourn, UK  —  The LumaSpec LS800S from Prior Scientific is a compact visible light spectrophotometer which provides quantitative spectral power data enabling users to characterise and monitor the illumination source of their microscope system.

Operating from 350 nm to 800 nm with 1.5 nm resolution, the LumaSpec LS800S uses an illumination target slide mounted on your microscope to provide accurate and precise information about the illumination in the sample plane, leading to the most relevant information being obtained.

The LumaSpec LS800S is capable of analysing the output from a wide variety of light sources, ranging from the dimmest LED to a powerful mercury burner light. Continue reading

Ultra High-Speed Imaging of Fracture & Crush Tests

 Kirana ultra high speed video camera

Tring, UK  —  Specialised Imaging reports on customer feasibility tests published on YouTube using its Kirana ultra high-speed video camera.

The movies ( show various impact fracture and crush tests performed on ceramic, plexiglass and polycarbonate plates taken at 5, 2 and 1 million frames per second using the Kirana ultra high speed video camera. Continue reading

Kistler’s Signal Conditioning Platform: Now on the Network

Increased Flexibility for High-Speed Combustion Analysis

Signal Conditioning Platform

Signal Conditioning Platform

Winterthur, Switzerland  —   Kistler is launching a new and improved Signal Conditioning Platform (SCP) that ensures process reliability and enables early detection of unsafe operating conditions in fixed or mobile combustion analysis applications.

For over 50 years, Kistler’s innovative solutions for high-precision combustion analysis have ensured the firm’s leading position in the global market.

With new Ethernet options and an improved software interface, Kistler’s new SCP for high-speed combustion analysis centralizes equipment configuration and optimizes usability for maximum flexibility. Continue reading

New Fluke Calibration 50 MHz Wideband Option

5730A Multifunction Calibrator

The new 50 MHz option also allows laboratories to expand their wideband capabilities to allow for calibration of devices such as 50 MHz RF voltmeters. It features improved specifications that will helps increase test uncertainty ratios (TURs) and increase test confidence while reducing the need to guardband. (PRNewsFoto/Fluke Calibration)

The new 50 MHz option also allows laboratories to expand their wideband capabilities to allow for calibration of devices such as 50 MHz RF voltmeters.  (PRNewsFoto/Fluke Calibration)

EVERETT, WA, USA — /PRNewswire/ — Fluke Calibration introduces the new 50 MHz Wideband Option for the 5730A High-Performance Multifunction Calibrator.

The option provides expanded wideband capabilities to self-maintaining laboratories by providing a method to calibrate the 50 MHz input of the 5790B AC Measurement Standard.

This is accomplished by characterizing the 5730A’s 50 MHz output using a precision thermal voltage converter (TVC), thus reducing uncertainties to calibrate the 5790B.

Download the Fluke Calibration whitepaper “Verifying the Wideband Input of an AC Measurement Standard” to learn more about this calibration process. Continue reading

Automation Compatible 3D Cell Culture Scaffolds

Mimetix® 3D Cell Culture


Co-culture of primary keratinocytes and primary dermal fibroblasts in the Mimetix® scaffold after 24 h (fibroblasts in the background, keratinocytes in the foreground). Courtesy of Dr A.J. Bullock, University of Sheffield

Abingdon, UK & Cambridge MA, USA  —  AMSBIO has announced the launch of Mimetix® 3D cell culture scaffolds that offer significant advantages for a range of applications including regenerative medicine, oncology research, drug discovery, and as a unique aligned scaffold for neural growth and investigation**.

There is a definite need for more predictive in vitro efficacy assays to reduce both the number of costly drug failures in clinical trials and the number of animals used in pre-clinical testing.

Performing certain cell-based assays in 3D has proven to improve their relevance as models; however, when choosing support for the cell culture growth, important factors to consider are: Continue reading

Bruker’s NMR FoodScreener™ Laboratory Achieves ISO/IEC 17025 Accreditation

NMR FoodScreener™ laboratory for food authenticity and quality determination – Rheinstetten, Germany

NMR FoodScreener™ laboratory for food authenticity and quality determination

NMR FoodScreener™ laboratory for food authenticity and quality determination

RHEINSTETTEN, Germany –– Bruker announced that its NMR FoodScreener™ laboratory for food authenticity and quality determination, located in Rheinstetten, Germany, has been granted ISO/IEC 17025 accreditation.

The certificate has been awarded for Bruker’s validated methods for the determination of ingredients and measures of authenticity and quality of liquid foods and food extracts by NMR spectroscopy.

Government and private analytical service laboratories offering NMR-based testing for food authenticity and quality with Bruker’s standard operating procedures (SOPs) and validated methods can now more easily get these NMR methods accredited in their lab.

Christian Kost, Managing Director of Winespin-Analytics GmbH, commented: “As a company providing NMR-based analytical wine profiling, the ISO/IEC 17025 accreditation of Bruker BioSpin is of significant importance, allowing us to now offer accredited NMR wine profiling according to international standards to our customers. The accreditation represents a milestone towards NMR becoming a more widely used technique for wine analysis, enabling us to offer this unique, information-rich technique to a broader set of wine industry customers.”

Continue reading

New DAQami Version 2.0 Advanced Data Logging Software

From Measurement Computing

PR-DAQami-V2NORTON, MA, USA –(BUSINESS WIRE)–Measurement Computing Corporation (MCC) has announced the release of DAQami version 2.0.

DAQami is an easy-to-use data logging software application compatible with most DAQ devices from MCC.

DAQami allows users to display and log data, review data, and export data to programs like Microsoft® Excel or MATLAB®. Users can quickly configure acquisition and channel options and choose from a variety of data displays.

New features in DAQami version 2.0 include support for digital and counter inputs, the ability to review acquired data during an acquisition, and support for additional MCC DAQ devices. Continue reading

Making RRH Field Testing Easier, Faster & More Cost-efficient

Anritsu’s new CPRI-based Solution Enables RF Tests at Ground Level

Anritsu Introduces CPRI-based Solution

CTIA Super Mobility 2015

MORGAN HILL, CA, USA — /PRNewswire/ — Anritsu Company introduces a CPRI RF Measurement option for its BTS Master™ handheld base station analyzer family that can significantly reduce the operational expense (OpEx) associated with troubleshooting interference at base stations.

Featuring best-in-class sweep speed and unique test capabilities, the BTS Master-based CPRI RF measurement test set allows field engineers and technicians to conduct accurate RF measurements on Remote Radio Heads (RRHs) while remaining at ground level, eliminating the considerable expense and time associated with calling a tower crew to conduct interference measurements.

With the new option installed, the BTS Master can conduct RF measurements over the fiber optic CPRI link connecting the baseband unit (BBU) and RRH. Continue reading