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SENSOR MODELS

This manual covers SDI-12 output models S2-411 and S2-412 (in bold below). Additional models are covered in

their respective manuals.

Model

S2-111

S2-112

S2-411

S2-412

Signal

Measures red and NIR irradiance (upward-looking) for NDVI

Voltage

Measures red and NIR irradiance (downward- looking ) for NDVI

Voltage

Measures red and NIR irradiance (upward-looking) for NDVI

SDI-12

Measures red and NIR irradiance (downward- looking ) for NDVI

SDI-12

Description

An upward-looking (S2-411) sensor's model number

and serial number are located on the bottom of the

sensor. If you need the manufacturing date of your

sensor, please contact Apogee Instruments with the

serial number of your sensor.

A downward-looking (S2-412) sensor's model

number and serial number are located near the

connector on the sensor cable. If you need the

manufacturing date of your sensor, please contact

Apogee Instruments with the serial number of your

sensor.