SRS-NDVI measuring instrumentLong term positioning monitoring of normalized vegetation index (NDVI) of the canopy can be carried out near the ground. NDVI is sensitive to the response of green vegetation and is often used to study the growth status of vegetation. The SRS-NDVI measuring instrument sensor has exquisite manufacturing technology, is sturdy and durable, and can work normally under various harsh weather conditions; It is compact in size and easy to install; High cost-effectiveness, can be deployed in multiple locations.

working principle

NDVI is calculated by adding the difference between the reflectance of the canopy at near-infrared wavelength (810nm) and the reflectance of red wavelength (650nm). Therefore, both upward and downward sensors need to be installed simultaneously to monitor the reflectance of the canopy at these two wavelengths.

The upward SRS-NDVI sensor detects light intensities at 810nm and 650nm. The measurement results represent the intensity of incident light from the sky. The sensor has undergone cosine correction and has a hemispherical field of view. During installation, it is necessary to ensure that there is only the sky within the field of view, without any canopy or other features.

The downward SRS-NDVI sensor also detects light intensities at 810nm and 650nm. The measurement results represent the intensity of reflected light from the canopy. The field of view of the sensor is limited to within 36 °, which allows the sensor to accurately face the measured canopy.

Product Features

• Low power consumption

• cost-effective

• Supports SDI-12 or DDI serial communication protocol

• Automatic measurement and data collection

• Marine grade epoxy resin sealing process, suitable for long-term use in humid and hot environments

• If ZL6 data collector is used, remote data viewing and downloading can be realized through Internet terminal

Application field

• Dynamic Monitoring of Normalized Difference Vegetation Index (NDVI) for Single Plant or Community Canopy

• Monitoring vegetation greening, aging, and stress status

• Canopy effective radiation interception

• Phenological monitoring of canopy growth

• Canopy Leaf Area Index

• Accumulation of canopy biomass

Technical Specifications

Ordering Guide

sensorSRS-NDVI upward hemisphere field of view sensor, SRS-NDVI downward field of view aperture sensor

data acquisitionZL6 data collector.

Optional accessories

Extension arm1m long aluminum tube, can assist in fixing sensors to infrastructure, can connect most square or circular positions and pipes with a diameter of 2 inches or less

Multi sensor fixed bracketMultiple sensors can be fixed on a bracket. It is recommended to have one upward sensor and no more than three downward sensors, with the downward sensor installed at a 90 ° angle

There are also options available for purchase.


Origin and Manufacturer:the United StatesMETERCompany_{(Former Decagon)}