YSI IQ SensorNet Barrier Box 1 is a Class I Division II rated sensor module. This module is used in conjunction with the following sensors in hazardous areas:

VARiON Plus 700 IQ H (Ammonium and Nitrate)

SensoLyt 700 IQ H (pH or ORP)

FDO 700/1 IQ H (Dissolved Oxygen)