METER APOGEE SU-221, Manual

2

USING APOGEE UV SENSORS WITH ZENTRA SYSTEM

1.  INTRODUCTION

Apogee Instruments SU-221 Ultraviolet (UV) Radiation sensors are designed for continuous 
UV radiation measurement in either indoor or outdoor environments. The Apogee UV sensor 
detects UV radiation from 300 to 400 nm, which lies primarily in the UV-A portion of the UV 
spectrum (315 to 400 nm).

The information in this document explains how to install the required hardware to mount 
Apogee UV sensors that have been preconfigured by METER Group to work seamlessly with 
METER ZENTRA series data loggers. Details of how the ZENTRA system handles the data are 
also included. Please read this document carefully in its entirety before going out to the field. 

For more information on Apogee sensors, please review the 

Ultraviolet-A Radiation Sensor 

User Manual

 or visit the 

Apogee UV sensor product page

 (apogeeinstruments.com/uv).

2.  INSTALLATION

Follow the steps listed in 

Table 1

 to install Apogee sensors in the field. A cable, mounting 

bracket, leveling plate, and screws are included with the sensor. Other tools will need to 
be provided. 

Table 1  Installation

Tools Needed

Wrench  13 mm (0.5 in) 

Flathead screwdriver

Mounting post  33.0 to 53.3 mm (1.3 to 2.1 in) diameter post, pole, tripod, 
tower, or other similar infrastructure that extends above the canopy

Mounting b leveling plate  Model AL-120 (included).

Nylon screw  #10-32 x 3/8 in (included)

METER ZENTRA series data logger  ZL6 or EM60

METER ZSC Bluetooth

®

 Sensor Interface (optional)

METER ZENTRA software  ZENTRA Utility, ZENTRA Utility Mobile, or 

ZENTRA Cloud