An ER 070 light emitter and receiver create a lightpath across the internal diameter of a stack or duct for an Opsis Continuous Emissions Monitoring system.
Light is generated by a xenon lamp in the emitter and projected to the receiver.
From the receiver, it is passed to the analyzer through a fibre optic cable. This unit is applicable to stacks with diameters of up to five metres. For wider stacks the ER 080 unit is recommended. An ER 070 unit also includes a separated, parallel lightpath for automatic span calibration, using a reference cell in a sealed, cross-stack tube. Automatic calibration requires the calibration unit CU 007.