SRS-PRI photochemical reflectance index measuring instrumentLong term positioning monitoring of plant canopy photochemical reflectance index (PRI) near the ground is an ideal method for studying the lutein cycle at the plant canopy level. SRS-PRI is made with exquisite craftsmanship, sturdy and durable, and can work normally in various harsh weather conditions; It is compact in size and easy to install; High cost-effectiveness, suitable for multiple locations.

working principle

The photochemical reflectance index (PRI) is calculated by adding the difference between the reflectance of the canopy at 532nm and 570nm to the sum of the two. Therefore, both upward and downward sensors need to be installed simultaneously to calculate the reflectance of the canopy at these two wavelengths.

The upward SRS-PRI sensor detects light intensities at 532nm and 570nm. 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-PRI sensor also detects light intensities at 532nm and 570nm. 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

• Study on the utilization efficiency of light energy in plant canopy

• Estimate the total primary productivity of the ecosystem

• Study the spatial distribution of carbon flux

• Study canopy drought, disease, or other stresses

Technical Specifications

Ordering Guide

sensorSRS-PRI upward hemisphere field of view sensor, SRS-PRI 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)}